/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loop-new/count_by_2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 23:45:05,963 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 23:45:05,968 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 23:45:06,028 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 23:45:06,144 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 23:45:06,146 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 23:45:06,147 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 23:45:06,153 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-02 23:45:06,172 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 23:45:06,172 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 23:45:06,175 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 23:45:06,175 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 23:45:06,175 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 23:45:06,175 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 23:45:06,175 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 23:45:06,176 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 23:45:06,176 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 23:45:06,176 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 23:45:06,176 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 23:45:06,176 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 23:45:06,176 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 23:45:06,176 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 23:45:06,177 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 23:45:06,177 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 23:45:06,177 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 23:45:06,177 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 23:45:06,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 23:45:06,177 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 23:45:06,178 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-02 23:45:06,178 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 23:45:06,178 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-02 23:45:06,178 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 23:45:06,610 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 23:45:06,643 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 23:45:06,646 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 23:45:06,648 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 23:45:06,649 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 23:45:06,652 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/count_by_2.i [2021-05-02 23:45:06,753 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b08b406a/5d4d0b0ef2554c42a2487aab234d673a/FLAG56d90830d [2021-05-02 23:45:07,272 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 23:45:07,273 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_2.i [2021-05-02 23:45:07,283 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b08b406a/5d4d0b0ef2554c42a2487aab234d673a/FLAG56d90830d [2021-05-02 23:45:07,631 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b08b406a/5d4d0b0ef2554c42a2487aab234d673a [2021-05-02 23:45:07,635 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 23:45:07,640 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 23:45:07,646 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 23:45:07,647 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 23:45:07,652 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 23:45:07,654 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:45:07" (1/1) ... [2021-05-02 23:45:07,657 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e07ac2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:45:07, skipping insertion in model container [2021-05-02 23:45:07,657 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:45:07" (1/1) ... [2021-05-02 23:45:07,667 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 23:45:07,689 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 23:45:07,874 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_2.i[891,904] [2021-05-02 23:45:07,884 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:45:07,897 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 23:45:07,910 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_2.i[891,904] [2021-05-02 23:45:07,913 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:45:07,931 INFO L208 MainTranslator]: Completed translation [2021-05-02 23:45:07,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:45:07 WrapperNode [2021-05-02 23:45:07,932 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 23:45:07,933 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 23:45:07,933 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 23:45:07,933 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 23:45:07,944 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:45:07" (1/1) ... [2021-05-02 23:45:07,945 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:45:07" (1/1) ... [2021-05-02 23:45:07,953 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:45:07" (1/1) ... [2021-05-02 23:45:07,953 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:45:07" (1/1) ... [2021-05-02 23:45:07,959 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:45:07" (1/1) ... [2021-05-02 23:45:07,964 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:45:07" (1/1) ... [2021-05-02 23:45:07,965 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:45:07" (1/1) ... [2021-05-02 23:45:07,967 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 23:45:07,969 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 23:45:07,969 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 23:45:07,969 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 23:45:07,970 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:45:07" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 23:45:08,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 23:45:08,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 23:45:08,109 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 23:45:08,109 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 23:45:08,109 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 23:45:08,109 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 23:45:08,109 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 23:45:08,109 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 23:45:08,110 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 23:45:08,110 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 23:45:08,110 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 23:45:08,110 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 23:45:08,110 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 23:45:08,110 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 23:45:08,110 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 23:45:08,111 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 23:45:08,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 23:45:08,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 23:45:08,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 23:45:08,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 23:45:08,111 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 23:45:08,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 23:45:08,381 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 23:45:08,382 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 23:45:08,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:45:08 BoogieIcfgContainer [2021-05-02 23:45:08,384 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 23:45:08,402 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 23:45:08,402 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 23:45:08,406 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 23:45:08,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 11:45:07" (1/3) ... [2021-05-02 23:45:08,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16e450cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:45:08, skipping insertion in model container [2021-05-02 23:45:08,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:45:07" (2/3) ... [2021-05-02 23:45:08,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16e450cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:45:08, skipping insertion in model container [2021-05-02 23:45:08,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:45:08" (3/3) ... [2021-05-02 23:45:08,420 INFO L111 eAbstractionObserver]: Analyzing ICFG count_by_2.i [2021-05-02 23:45:08,427 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-02 23:45:08,432 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 23:45:08,467 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 23:45:08,530 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 23:45:08,530 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 23:45:08,530 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-02 23:45:08,530 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 23:45:08,530 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 23:45:08,531 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 23:45:08,531 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 23:45:08,531 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 23:45:08,564 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:45:08,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 23:45:08,572 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:08,573 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:08,573 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:08,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:08,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1305738320, now seen corresponding path program 1 times [2021-05-02 23:45:08,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:08,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1683099507] [2021-05-02 23:45:08,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:08,716 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:45:08,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:08,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:08,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:09,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:09,018 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:09,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1683099507] [2021-05-02 23:45:09,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1683099507] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:09,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:09,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 23:45:09,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401889645] [2021-05-02 23:45:09,034 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 23:45:09,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:09,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 23:45:09,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 23:45:09,050 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 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 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:09,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:09,224 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2021-05-02 23:45:09,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 23:45:09,227 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 23:45:09,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:09,234 INFO L225 Difference]: With dead ends: 34 [2021-05-02 23:45:09,235 INFO L226 Difference]: Without dead ends: 15 [2021-05-02 23:45:09,239 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 103.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 23:45:09,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-05-02 23:45:09,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2021-05-02 23:45:09,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:09,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-05-02 23:45:09,298 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2021-05-02 23:45:09,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:09,299 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-05-02 23:45:09,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:09,301 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-05-02 23:45:09,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-02 23:45:09,303 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:09,304 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:09,304 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 23:45:09,304 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:09,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:09,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1786070446, now seen corresponding path program 1 times [2021-05-02 23:45:09,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:09,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1620976818] [2021-05-02 23:45:09,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:09,371 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_11 1000000) InVars {main_~i~0=v_main_~i~0_11} OutVars{main_~i~0=v_main_~i~0_11} AuxVars[] AssignedVars[] [2021-05-02 23:45:09,396 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:09,433 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:09,469 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:09,517 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:09,598 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:09,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:09,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:09,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:09,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:09,908 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:09,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1620976818] [2021-05-02 23:45:09,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1620976818] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:09,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:09,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 23:45:09,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346330521] [2021-05-02 23:45:09,911 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 23:45:09,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:09,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 23:45:09,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-02 23:45:09,914 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 7 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) [2021-05-02 23:45:10,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:10,048 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2021-05-02 23:45:10,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 23:45:10,048 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.125) internal successors, (9), 7 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 [2021-05-02 23:45:10,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:10,050 INFO L225 Difference]: With dead ends: 22 [2021-05-02 23:45:10,050 INFO L226 Difference]: Without dead ends: 17 [2021-05-02 23:45:10,052 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 131.4ms TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-05-02 23:45:10,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-02 23:45:10,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2021-05-02 23:45:10,061 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) [2021-05-02 23:45:10,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2021-05-02 23:45:10,062 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2021-05-02 23:45:10,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:10,062 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2021-05-02 23:45:10,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.125) internal successors, (9), 7 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) [2021-05-02 23:45:10,062 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2021-05-02 23:45:10,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 23:45:10,063 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:10,063 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:10,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 23:45:10,065 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:10,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:10,067 INFO L82 PathProgramCache]: Analyzing trace with hash -471224436, now seen corresponding path program 2 times [2021-05-02 23:45:10,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:10,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1584680274] [2021-05-02 23:45:10,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:10,086 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_15 1000000) InVars {main_~i~0=v_main_~i~0_15} OutVars{main_~i~0=v_main_~i~0_15} AuxVars[] AssignedVars[] [2021-05-02 23:45:10,095 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:10,106 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:10,114 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:10,130 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:10,151 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:10,155 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_17 999998) InVars {main_~i~0=v_main_~i~0_17} OutVars{main_~i~0=v_main_~i~0_17} AuxVars[] AssignedVars[] [2021-05-02 23:45:10,161 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:10,164 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:10,173 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:10,208 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:10,242 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:10,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:10,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:10,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:10,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:10,489 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:10,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1584680274] [2021-05-02 23:45:10,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1584680274] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:10,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:10,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-02 23:45:10,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699282076] [2021-05-02 23:45:10,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 23:45:10,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:10,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 23:45:10,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 23:45:10,492 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) [2021-05-02 23:45:10,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:10,615 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2021-05-02 23:45:10,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 23:45:10,616 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-05-02 23:45:10,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:10,616 INFO L225 Difference]: With dead ends: 24 [2021-05-02 23:45:10,617 INFO L226 Difference]: Without dead ends: 19 [2021-05-02 23:45:10,617 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 136.2ms TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-05-02 23:45:10,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-02 23:45:10,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-05-02 23:45:10,621 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) [2021-05-02 23:45:10,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2021-05-02 23:45:10,622 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2021-05-02 23:45:10,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:10,622 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2021-05-02 23:45:10,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:10,623 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2021-05-02 23:45:10,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 23:45:10,623 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:10,623 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:10,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 23:45:10,624 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:10,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:10,624 INFO L82 PathProgramCache]: Analyzing trace with hash -773121558, now seen corresponding path program 3 times [2021-05-02 23:45:10,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:10,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1621880579] [2021-05-02 23:45:10,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:10,631 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_22 1000000) InVars {main_~i~0=v_main_~i~0_22} OutVars{main_~i~0=v_main_~i~0_22} AuxVars[] AssignedVars[] [2021-05-02 23:45:10,635 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:10,649 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:10,657 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:10,680 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:10,703 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:10,707 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_24 999998) InVars {main_~i~0=v_main_~i~0_24} OutVars{main_~i~0=v_main_~i~0_24} AuxVars[] AssignedVars[] [2021-05-02 23:45:10,712 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:10,727 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:10,739 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:10,758 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:10,779 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:10,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:10,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:10,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:10,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:11,002 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:11,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1621880579] [2021-05-02 23:45:11,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1621880579] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:11,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:11,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-02 23:45:11,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238264050] [2021-05-02 23:45:11,004 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 23:45:11,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:11,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 23:45:11,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-02 23:45:11,005 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:11,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:11,173 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-05-02 23:45:11,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 23:45:11,202 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-05-02 23:45:11,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:11,203 INFO L225 Difference]: With dead ends: 26 [2021-05-02 23:45:11,203 INFO L226 Difference]: Without dead ends: 21 [2021-05-02 23:45:11,203 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 174.2ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-05-02 23:45:11,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-05-02 23:45:11,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2021-05-02 23:45:11,208 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) [2021-05-02 23:45:11,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2021-05-02 23:45:11,208 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2021-05-02 23:45:11,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:11,209 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2021-05-02 23:45:11,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:11,214 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2021-05-02 23:45:11,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-02 23:45:11,215 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:11,215 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:11,215 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 23:45:11,215 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:11,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:11,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1161520328, now seen corresponding path program 4 times [2021-05-02 23:45:11,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:11,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [398455234] [2021-05-02 23:45:11,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:11,233 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_30 1000000) InVars {main_~i~0=v_main_~i~0_30} OutVars{main_~i~0=v_main_~i~0_30} AuxVars[] AssignedVars[] [2021-05-02 23:45:11,238 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:11,242 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:11,250 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:11,289 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:11,314 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:11,317 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_32 999998) InVars {main_~i~0=v_main_~i~0_32} OutVars{main_~i~0=v_main_~i~0_32} AuxVars[] AssignedVars[] [2021-05-02 23:45:11,329 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:11,341 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:11,361 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:11,386 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:11,406 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:11,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:11,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:11,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:11,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:11,632 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:11,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [398455234] [2021-05-02 23:45:11,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [398455234] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:11,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:11,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-02 23:45:11,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381697197] [2021-05-02 23:45:11,634 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 23:45:11,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:11,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 23:45:11,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:45:11,635 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 10 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) [2021-05-02 23:45:11,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:11,848 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2021-05-02 23:45:11,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 23:45:11,849 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 10 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 [2021-05-02 23:45:11,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:11,852 INFO L225 Difference]: With dead ends: 28 [2021-05-02 23:45:11,852 INFO L226 Difference]: Without dead ends: 23 [2021-05-02 23:45:11,854 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 229.8ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-05-02 23:45:11,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-02 23:45:11,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2021-05-02 23:45:11,859 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) [2021-05-02 23:45:11,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2021-05-02 23:45:11,860 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2021-05-02 23:45:11,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:11,860 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2021-05-02 23:45:11,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 10 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) [2021-05-02 23:45:11,860 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2021-05-02 23:45:11,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-02 23:45:11,861 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:11,861 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:11,861 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-02 23:45:11,861 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:11,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:11,862 INFO L82 PathProgramCache]: Analyzing trace with hash 631533606, now seen corresponding path program 5 times [2021-05-02 23:45:11,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:11,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [326161692] [2021-05-02 23:45:11,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:11,868 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_39 1000000) InVars {main_~i~0=v_main_~i~0_39} OutVars{main_~i~0=v_main_~i~0_39} AuxVars[] AssignedVars[] [2021-05-02 23:45:11,871 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:11,875 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:11,882 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:11,927 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:11,949 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:11,953 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_41 999998) InVars {main_~i~0=v_main_~i~0_41} OutVars{main_~i~0=v_main_~i~0_41} AuxVars[] AssignedVars[] [2021-05-02 23:45:11,958 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:11,964 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:11,976 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:12,006 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:12,025 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:12,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:12,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:12,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:12,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:12,243 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:12,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [326161692] [2021-05-02 23:45:12,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [326161692] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:12,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:12,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-05-02 23:45:12,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188181524] [2021-05-02 23:45:12,245 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 23:45:12,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:12,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 23:45:12,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-02 23:45:12,246 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:12,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:12,454 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2021-05-02 23:45:12,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 23:45:12,455 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-05-02 23:45:12,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:12,456 INFO L225 Difference]: With dead ends: 30 [2021-05-02 23:45:12,456 INFO L226 Difference]: Without dead ends: 25 [2021-05-02 23:45:12,457 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 219.2ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-05-02 23:45:12,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-02 23:45:12,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-05-02 23:45:12,461 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) [2021-05-02 23:45:12,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2021-05-02 23:45:12,462 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2021-05-02 23:45:12,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:12,462 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2021-05-02 23:45:12,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:12,463 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2021-05-02 23:45:12,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 23:45:12,463 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:12,463 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:12,463 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-02 23:45:12,464 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:12,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:12,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1879565308, now seen corresponding path program 6 times [2021-05-02 23:45:12,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:12,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1725594110] [2021-05-02 23:45:12,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:12,472 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_49 1000000) InVars {main_~i~0=v_main_~i~0_49} OutVars{main_~i~0=v_main_~i~0_49} AuxVars[] AssignedVars[] [2021-05-02 23:45:12,475 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:12,486 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:12,493 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:12,512 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:12,528 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:12,533 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_51 999998) InVars {main_~i~0=v_main_~i~0_51} OutVars{main_~i~0=v_main_~i~0_51} AuxVars[] AssignedVars[] [2021-05-02 23:45:12,542 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:12,550 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:12,560 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:12,575 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:12,591 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:12,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:12,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:12,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:12,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:12,797 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:12,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1725594110] [2021-05-02 23:45:12,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1725594110] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:12,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:12,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-05-02 23:45:12,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53866488] [2021-05-02 23:45:12,801 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 23:45:12,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:12,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 23:45:12,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-05-02 23:45:12,803 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:13,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:13,099 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2021-05-02 23:45:13,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 23:45:13,100 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-05-02 23:45:13,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:13,100 INFO L225 Difference]: With dead ends: 32 [2021-05-02 23:45:13,100 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 23:45:13,101 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 261.3ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-05-02 23:45:13,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 23:45:13,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-05-02 23:45:13,106 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) [2021-05-02 23:45:13,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2021-05-02 23:45:13,106 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2021-05-02 23:45:13,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:13,107 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2021-05-02 23:45:13,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:13,107 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2021-05-02 23:45:13,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-02 23:45:13,108 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:13,108 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:13,108 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-02 23:45:13,108 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:13,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:13,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1274001310, now seen corresponding path program 7 times [2021-05-02 23:45:13,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:13,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1402607459] [2021-05-02 23:45:13,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:13,116 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_60 1000000) InVars {main_~i~0=v_main_~i~0_60} OutVars{main_~i~0=v_main_~i~0_60} AuxVars[] AssignedVars[] [2021-05-02 23:45:13,118 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:13,120 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:13,128 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:13,149 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:13,165 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:13,168 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_62 999998) InVars {main_~i~0=v_main_~i~0_62} OutVars{main_~i~0=v_main_~i~0_62} AuxVars[] AssignedVars[] [2021-05-02 23:45:13,172 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:13,186 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:13,192 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:13,208 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:13,222 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:13,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:13,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:13,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:13,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:13,397 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:13,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1402607459] [2021-05-02 23:45:13,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1402607459] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:13,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:13,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-05-02 23:45:13,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597323489] [2021-05-02 23:45:13,399 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 23:45:13,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:13,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 23:45:13,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-02 23:45:13,400 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand has 15 states, 14 states have (on average 1.5) internal successors, (21), 13 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) [2021-05-02 23:45:13,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:13,712 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2021-05-02 23:45:13,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 23:45:13,713 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.5) internal successors, (21), 13 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 [2021-05-02 23:45:13,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:13,714 INFO L225 Difference]: With dead ends: 34 [2021-05-02 23:45:13,714 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 23:45:13,714 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 263.9ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-05-02 23:45:13,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 23:45:13,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-05-02 23:45:13,719 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) [2021-05-02 23:45:13,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2021-05-02 23:45:13,720 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2021-05-02 23:45:13,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:13,720 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2021-05-02 23:45:13,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.5) internal successors, (21), 13 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) [2021-05-02 23:45:13,720 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2021-05-02 23:45:13,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 23:45:13,721 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:13,721 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:13,721 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-02 23:45:13,722 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:13,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:13,722 INFO L82 PathProgramCache]: Analyzing trace with hash 852415808, now seen corresponding path program 8 times [2021-05-02 23:45:13,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:13,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [948558702] [2021-05-02 23:45:13,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:13,729 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_72 1000000) InVars {main_~i~0=v_main_~i~0_72} OutVars{main_~i~0=v_main_~i~0_72} AuxVars[] AssignedVars[] [2021-05-02 23:45:13,732 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:13,733 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:13,744 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:13,771 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:13,790 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:13,792 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_74 999998) InVars {main_~i~0=v_main_~i~0_74} OutVars{main_~i~0=v_main_~i~0_74} AuxVars[] AssignedVars[] [2021-05-02 23:45:13,795 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:13,796 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:13,803 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:13,827 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:13,845 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:13,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:13,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:13,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:13,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:14,047 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:14,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [948558702] [2021-05-02 23:45:14,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [948558702] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:14,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:14,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-02 23:45:14,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076854241] [2021-05-02 23:45:14,048 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 23:45:14,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:14,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 23:45:14,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:45:14,050 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:14,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:14,445 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2021-05-02 23:45:14,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 23:45:14,446 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-05-02 23:45:14,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:14,447 INFO L225 Difference]: With dead ends: 36 [2021-05-02 23:45:14,447 INFO L226 Difference]: Without dead ends: 31 [2021-05-02 23:45:14,448 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 321.5ms TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-05-02 23:45:14,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-02 23:45:14,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2021-05-02 23:45:14,452 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) [2021-05-02 23:45:14,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2021-05-02 23:45:14,453 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2021-05-02 23:45:14,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:14,453 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2021-05-02 23:45:14,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:14,454 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2021-05-02 23:45:14,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 23:45:14,454 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:14,454 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:14,455 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-02 23:45:14,455 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:14,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:14,455 INFO L82 PathProgramCache]: Analyzing trace with hash -65166690, now seen corresponding path program 9 times [2021-05-02 23:45:14,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:14,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [895018293] [2021-05-02 23:45:14,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:14,461 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_85 1000000) InVars {main_~i~0=v_main_~i~0_85} OutVars{main_~i~0=v_main_~i~0_85} AuxVars[] AssignedVars[] [2021-05-02 23:45:14,463 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:14,471 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:14,478 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:14,491 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:14,507 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:14,510 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_87 999998) InVars {main_~i~0=v_main_~i~0_87} OutVars{main_~i~0=v_main_~i~0_87} AuxVars[] AssignedVars[] [2021-05-02 23:45:14,513 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:14,521 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:14,527 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:14,557 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:14,572 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:14,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:14,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:14,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:14,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:14,810 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:14,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [895018293] [2021-05-02 23:45:14,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [895018293] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:14,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:14,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-02 23:45:14,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746820891] [2021-05-02 23:45:14,811 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 23:45:14,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:14,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 23:45:14,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-02 23:45:14,812 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand has 17 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:15,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:15,231 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2021-05-02 23:45:15,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 23:45:15,232 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-05-02 23:45:15,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:15,233 INFO L225 Difference]: With dead ends: 38 [2021-05-02 23:45:15,233 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 23:45:15,233 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 370.5ms TimeCoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2021-05-02 23:45:15,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 23:45:15,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-05-02 23:45:15,239 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) [2021-05-02 23:45:15,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2021-05-02 23:45:15,240 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 29 [2021-05-02 23:45:15,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:15,240 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2021-05-02 23:45:15,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:15,240 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2021-05-02 23:45:15,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 23:45:15,241 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:15,241 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:15,241 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-02 23:45:15,241 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:15,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:15,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1393651588, now seen corresponding path program 10 times [2021-05-02 23:45:15,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:15,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1663036668] [2021-05-02 23:45:15,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:15,250 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_99 1000000) InVars {main_~i~0=v_main_~i~0_99} OutVars{main_~i~0=v_main_~i~0_99} AuxVars[] AssignedVars[] [2021-05-02 23:45:15,252 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:15,268 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:15,275 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:15,288 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:15,304 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:15,308 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_101 999998) InVars {main_~i~0=v_main_~i~0_101} OutVars{main_~i~0=v_main_~i~0_101} AuxVars[] AssignedVars[] [2021-05-02 23:45:15,310 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:15,311 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:15,321 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:15,343 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:15,362 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:15,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:15,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:15,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:15,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:15,644 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:15,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1663036668] [2021-05-02 23:45:15,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1663036668] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:15,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:15,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-02 23:45:15,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478463606] [2021-05-02 23:45:15,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 23:45:15,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:15,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 23:45:15,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-02 23:45:15,646 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand has 18 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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) [2021-05-02 23:45:16,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:16,111 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2021-05-02 23:45:16,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 23:45:16,112 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 [2021-05-02 23:45:16,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:16,112 INFO L225 Difference]: With dead ends: 40 [2021-05-02 23:45:16,113 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 23:45:16,113 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 404.8ms TimeCoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2021-05-02 23:45:16,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 23:45:16,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-05-02 23:45:16,118 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) [2021-05-02 23:45:16,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2021-05-02 23:45:16,118 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 31 [2021-05-02 23:45:16,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:16,119 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2021-05-02 23:45:16,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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) [2021-05-02 23:45:16,119 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2021-05-02 23:45:16,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 23:45:16,119 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:16,119 INFO L523 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:16,120 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-02 23:45:16,120 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:16,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:16,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1832615642, now seen corresponding path program 11 times [2021-05-02 23:45:16,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:16,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [396235522] [2021-05-02 23:45:16,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:16,125 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_114 1000000) InVars {main_~i~0=v_main_~i~0_114} OutVars{main_~i~0=v_main_~i~0_114} AuxVars[] AssignedVars[] [2021-05-02 23:45:16,127 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:16,127 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:16,134 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:16,148 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:16,160 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:16,161 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_116 999998) InVars {main_~i~0=v_main_~i~0_116} OutVars{main_~i~0=v_main_~i~0_116} AuxVars[] AssignedVars[] [2021-05-02 23:45:16,163 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:16,164 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:16,169 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:16,184 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:16,197 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:16,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:16,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:16,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:16,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:16,446 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:16,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [396235522] [2021-05-02 23:45:16,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [396235522] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:16,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:16,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-05-02 23:45:16,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700460492] [2021-05-02 23:45:16,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 23:45:16,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:16,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 23:45:16,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-05-02 23:45:16,448 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:16,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:16,912 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2021-05-02 23:45:16,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 23:45:16,912 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2021-05-02 23:45:16,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:16,913 INFO L225 Difference]: With dead ends: 42 [2021-05-02 23:45:16,913 INFO L226 Difference]: Without dead ends: 37 [2021-05-02 23:45:16,914 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 409.4ms TimeCoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2021-05-02 23:45:16,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-02 23:45:16,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2021-05-02 23:45:16,918 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) [2021-05-02 23:45:16,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2021-05-02 23:45:16,919 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 33 [2021-05-02 23:45:16,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:16,919 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2021-05-02 23:45:16,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:16,919 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2021-05-02 23:45:16,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 23:45:16,920 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:16,920 INFO L523 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:16,920 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-02 23:45:16,920 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:16,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:16,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1309035960, now seen corresponding path program 12 times [2021-05-02 23:45:16,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:16,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1213923931] [2021-05-02 23:45:16,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:16,925 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_130 1000000) InVars {main_~i~0=v_main_~i~0_130} OutVars{main_~i~0=v_main_~i~0_130} AuxVars[] AssignedVars[] [2021-05-02 23:45:16,927 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:16,928 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:16,943 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:16,958 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:16,970 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:16,973 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_132 999998) InVars {main_~i~0=v_main_~i~0_132} OutVars{main_~i~0=v_main_~i~0_132} AuxVars[] AssignedVars[] [2021-05-02 23:45:16,975 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:16,976 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:16,985 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:17,002 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:17,016 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:17,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:17,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:17,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:17,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:17,254 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:17,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1213923931] [2021-05-02 23:45:17,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1213923931] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:17,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:17,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-05-02 23:45:17,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900660304] [2021-05-02 23:45:17,255 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 23:45:17,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:17,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 23:45:17,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:45:17,256 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:17,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:17,767 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2021-05-02 23:45:17,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 23:45:17,767 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-05-02 23:45:17,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:17,768 INFO L225 Difference]: With dead ends: 44 [2021-05-02 23:45:17,768 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 23:45:17,769 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 443.2ms TimeCoverageRelationStatistics Valid=122, Invalid=1000, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 23:45:17,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 23:45:17,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2021-05-02 23:45:17,773 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) [2021-05-02 23:45:17,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2021-05-02 23:45:17,774 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 35 [2021-05-02 23:45:17,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:17,774 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2021-05-02 23:45:17,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:17,774 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2021-05-02 23:45:17,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 23:45:17,775 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:17,775 INFO L523 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:17,775 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-02 23:45:17,775 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:17,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:17,775 INFO L82 PathProgramCache]: Analyzing trace with hash 660135190, now seen corresponding path program 13 times [2021-05-02 23:45:17,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:17,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [183453015] [2021-05-02 23:45:17,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:17,779 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_147 1000000) InVars {main_~i~0=v_main_~i~0_147} OutVars{main_~i~0=v_main_~i~0_147} AuxVars[] AssignedVars[] [2021-05-02 23:45:17,781 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:17,786 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:17,790 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:17,800 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:17,812 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:17,813 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_149 999998) InVars {main_~i~0=v_main_~i~0_149} OutVars{main_~i~0=v_main_~i~0_149} AuxVars[] AssignedVars[] [2021-05-02 23:45:17,815 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:17,820 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:17,825 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:17,833 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:17,845 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:17,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:17,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:17,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:17,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:18,107 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:18,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [183453015] [2021-05-02 23:45:18,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [183453015] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:18,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:18,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-05-02 23:45:18,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635630467] [2021-05-02 23:45:18,108 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 23:45:18,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:18,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 23:45:18,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-05-02 23:45:18,109 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand has 21 states, 20 states have (on average 1.65) internal successors, (33), 19 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) [2021-05-02 23:45:18,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:18,648 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2021-05-02 23:45:18,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 23:45:18,649 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.65) internal successors, (33), 19 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 [2021-05-02 23:45:18,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:18,649 INFO L225 Difference]: With dead ends: 46 [2021-05-02 23:45:18,649 INFO L226 Difference]: Without dead ends: 41 [2021-05-02 23:45:18,650 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 489.6ms TimeCoverageRelationStatistics Valid=130, Invalid=1130, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 23:45:18,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-02 23:45:18,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2021-05-02 23:45:18,655 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) [2021-05-02 23:45:18,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2021-05-02 23:45:18,655 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 37 [2021-05-02 23:45:18,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:18,656 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2021-05-02 23:45:18,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 20 states have (on average 1.65) internal successors, (33), 19 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) [2021-05-02 23:45:18,656 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2021-05-02 23:45:18,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 23:45:18,656 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:18,656 INFO L523 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:18,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-05-02 23:45:18,656 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:18,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:18,657 INFO L82 PathProgramCache]: Analyzing trace with hash -163246860, now seen corresponding path program 14 times [2021-05-02 23:45:18,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:18,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2001582542] [2021-05-02 23:45:18,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:18,669 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_165 1000000) InVars {main_~i~0=v_main_~i~0_165} OutVars{main_~i~0=v_main_~i~0_165} AuxVars[] AssignedVars[] [2021-05-02 23:45:18,671 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:18,672 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:18,676 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:18,690 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:18,702 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:18,703 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_167 999998) InVars {main_~i~0=v_main_~i~0_167} OutVars{main_~i~0=v_main_~i~0_167} AuxVars[] AssignedVars[] [2021-05-02 23:45:18,705 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:18,706 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:18,710 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:18,723 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:18,735 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:18,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:18,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:18,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:18,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:19,006 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:19,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2001582542] [2021-05-02 23:45:19,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2001582542] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:19,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:19,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-02 23:45:19,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72480630] [2021-05-02 23:45:19,006 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 23:45:19,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:19,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 23:45:19,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-05-02 23:45:19,007 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand has 22 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 20 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:19,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:19,642 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2021-05-02 23:45:19,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 23:45:19,642 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 20 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2021-05-02 23:45:19,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:19,643 INFO L225 Difference]: With dead ends: 48 [2021-05-02 23:45:19,643 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 23:45:19,644 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 521.5ms TimeCoverageRelationStatistics Valid=138, Invalid=1268, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 23:45:19,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 23:45:19,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2021-05-02 23:45:19,649 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) [2021-05-02 23:45:19,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2021-05-02 23:45:19,650 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 39 [2021-05-02 23:45:19,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:19,650 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2021-05-02 23:45:19,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 20 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:19,651 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2021-05-02 23:45:19,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 23:45:19,651 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:19,651 INFO L523 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:19,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-02 23:45:19,652 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:19,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:19,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1159414446, now seen corresponding path program 15 times [2021-05-02 23:45:19,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:19,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1837537105] [2021-05-02 23:45:19,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:19,657 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_184 1000000) InVars {main_~i~0=v_main_~i~0_184} OutVars{main_~i~0=v_main_~i~0_184} AuxVars[] AssignedVars[] [2021-05-02 23:45:19,659 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:19,660 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:19,666 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:19,686 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:19,700 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:19,703 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_186 999998) InVars {main_~i~0=v_main_~i~0_186} OutVars{main_~i~0=v_main_~i~0_186} AuxVars[] AssignedVars[] [2021-05-02 23:45:19,706 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:19,707 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:19,714 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:19,736 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:19,755 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:19,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:19,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:19,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:19,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:20,077 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:20,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1837537105] [2021-05-02 23:45:20,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1837537105] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:20,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:20,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-05-02 23:45:20,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407007974] [2021-05-02 23:45:20,078 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 23:45:20,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:20,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 23:45:20,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-05-02 23:45:20,079 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand has 23 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:20,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:20,799 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2021-05-02 23:45:20,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 23:45:20,800 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2021-05-02 23:45:20,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:20,800 INFO L225 Difference]: With dead ends: 50 [2021-05-02 23:45:20,800 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 23:45:20,801 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 636.0ms TimeCoverageRelationStatistics Valid=146, Invalid=1414, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 23:45:20,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 23:45:20,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2021-05-02 23:45:20,807 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) [2021-05-02 23:45:20,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2021-05-02 23:45:20,807 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 41 [2021-05-02 23:45:20,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:20,808 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2021-05-02 23:45:20,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:20,808 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2021-05-02 23:45:20,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 23:45:20,808 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:20,808 INFO L523 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:20,809 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-05-02 23:45:20,809 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:20,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:20,809 INFO L82 PathProgramCache]: Analyzing trace with hash -698757584, now seen corresponding path program 16 times [2021-05-02 23:45:20,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:20,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2020647354] [2021-05-02 23:45:20,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:20,815 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_204 1000000) InVars {main_~i~0=v_main_~i~0_204} OutVars{main_~i~0=v_main_~i~0_204} AuxVars[] AssignedVars[] [2021-05-02 23:45:20,817 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:20,824 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:20,830 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:20,843 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:20,856 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:20,863 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_206 999998) InVars {main_~i~0=v_main_~i~0_206} OutVars{main_~i~0=v_main_~i~0_206} AuxVars[] AssignedVars[] [2021-05-02 23:45:20,865 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:20,867 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:20,873 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:20,897 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:20,911 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:20,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:20,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:20,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:20,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:21,234 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:21,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2020647354] [2021-05-02 23:45:21,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2020647354] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:21,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:21,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-05-02 23:45:21,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149226480] [2021-05-02 23:45:21,237 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 23:45:21,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:21,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 23:45:21,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-05-02 23:45:21,239 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand has 24 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 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) [2021-05-02 23:45:22,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:22,008 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2021-05-02 23:45:22,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 23:45:22,009 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 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 [2021-05-02 23:45:22,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:22,010 INFO L225 Difference]: With dead ends: 52 [2021-05-02 23:45:22,010 INFO L226 Difference]: Without dead ends: 47 [2021-05-02 23:45:22,011 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 653.9ms TimeCoverageRelationStatistics Valid=154, Invalid=1568, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 23:45:22,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-02 23:45:22,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2021-05-02 23:45:22,024 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) [2021-05-02 23:45:22,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2021-05-02 23:45:22,029 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 43 [2021-05-02 23:45:22,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:22,030 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2021-05-02 23:45:22,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 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) [2021-05-02 23:45:22,030 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2021-05-02 23:45:22,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 23:45:22,031 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:22,031 INFO L523 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:22,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-05-02 23:45:22,032 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:22,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:22,033 INFO L82 PathProgramCache]: Analyzing trace with hash -389144690, now seen corresponding path program 17 times [2021-05-02 23:45:22,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:22,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744325227] [2021-05-02 23:45:22,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:22,041 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_225 1000000) InVars {main_~i~0=v_main_~i~0_225} OutVars{main_~i~0=v_main_~i~0_225} AuxVars[] AssignedVars[] [2021-05-02 23:45:22,045 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:22,056 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:22,063 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:22,079 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:22,099 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:22,102 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_227 999998) InVars {main_~i~0=v_main_~i~0_227} OutVars{main_~i~0=v_main_~i~0_227} AuxVars[] AssignedVars[] [2021-05-02 23:45:22,104 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:22,105 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:22,112 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:22,134 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:22,150 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:22,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:22,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:22,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:22,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:22,553 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:22,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744325227] [2021-05-02 23:45:22,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [744325227] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:22,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:22,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-05-02 23:45:22,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904931026] [2021-05-02 23:45:22,554 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 23:45:22,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:22,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 23:45:22,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-05-02 23:45:22,555 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand has 25 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:23,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:23,382 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2021-05-02 23:45:23,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 23:45:23,382 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2021-05-02 23:45:23,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:23,383 INFO L225 Difference]: With dead ends: 54 [2021-05-02 23:45:23,383 INFO L226 Difference]: Without dead ends: 49 [2021-05-02 23:45:23,384 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 739.4ms TimeCoverageRelationStatistics Valid=162, Invalid=1730, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 23:45:23,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-02 23:45:23,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2021-05-02 23:45:23,391 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) [2021-05-02 23:45:23,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2021-05-02 23:45:23,391 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 45 [2021-05-02 23:45:23,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:23,391 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2021-05-02 23:45:23,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:23,392 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2021-05-02 23:45:23,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 23:45:23,392 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:23,392 INFO L523 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:23,392 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-05-02 23:45:23,392 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:23,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:23,393 INFO L82 PathProgramCache]: Analyzing trace with hash 796103020, now seen corresponding path program 18 times [2021-05-02 23:45:23,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:23,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [332327839] [2021-05-02 23:45:23,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:23,398 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_247 1000000) InVars {main_~i~0=v_main_~i~0_247} OutVars{main_~i~0=v_main_~i~0_247} AuxVars[] AssignedVars[] [2021-05-02 23:45:23,401 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:23,408 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:23,414 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:23,427 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:23,440 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:23,442 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_249 999998) InVars {main_~i~0=v_main_~i~0_249} OutVars{main_~i~0=v_main_~i~0_249} AuxVars[] AssignedVars[] [2021-05-02 23:45:23,445 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:23,447 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:23,453 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:23,472 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:23,485 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:23,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:23,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:23,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:23,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:23,870 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:23,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [332327839] [2021-05-02 23:45:23,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [332327839] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:23,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:23,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-05-02 23:45:23,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005364771] [2021-05-02 23:45:23,871 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 23:45:23,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:23,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 23:45:23,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2021-05-02 23:45:23,872 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand has 26 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:24,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:24,767 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2021-05-02 23:45:24,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 23:45:24,768 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2021-05-02 23:45:24,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:24,769 INFO L225 Difference]: With dead ends: 56 [2021-05-02 23:45:24,769 INFO L226 Difference]: Without dead ends: 51 [2021-05-02 23:45:24,770 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 780.8ms TimeCoverageRelationStatistics Valid=170, Invalid=1900, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 23:45:24,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-02 23:45:24,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2021-05-02 23:45:24,777 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) [2021-05-02 23:45:24,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2021-05-02 23:45:24,777 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 47 [2021-05-02 23:45:24,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:24,778 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2021-05-02 23:45:24,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:24,778 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2021-05-02 23:45:24,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 23:45:24,778 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:24,779 INFO L523 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:24,779 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-05-02 23:45:24,779 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:24,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:24,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1652818890, now seen corresponding path program 19 times [2021-05-02 23:45:24,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:24,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [112142695] [2021-05-02 23:45:24,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:24,785 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_270 1000000) InVars {main_~i~0=v_main_~i~0_270} OutVars{main_~i~0=v_main_~i~0_270} AuxVars[] AssignedVars[] [2021-05-02 23:45:24,787 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:24,795 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:24,801 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:24,814 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:24,829 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:24,831 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_272 999998) InVars {main_~i~0=v_main_~i~0_272} OutVars{main_~i~0=v_main_~i~0_272} AuxVars[] AssignedVars[] [2021-05-02 23:45:24,836 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:24,841 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:24,847 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:24,866 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:24,881 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:24,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:24,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:24,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:24,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:25,320 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:25,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [112142695] [2021-05-02 23:45:25,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [112142695] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:25,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:25,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-05-02 23:45:25,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263302720] [2021-05-02 23:45:25,321 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-02 23:45:25,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:25,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-02 23:45:25,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-05-02 23:45:25,322 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand has 27 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 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) [2021-05-02 23:45:26,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:26,175 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2021-05-02 23:45:26,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-02 23:45:26,176 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 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 [2021-05-02 23:45:26,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:26,176 INFO L225 Difference]: With dead ends: 58 [2021-05-02 23:45:26,176 INFO L226 Difference]: Without dead ends: 53 [2021-05-02 23:45:26,177 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 17 SyntacticMatches, 6 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 793.4ms TimeCoverageRelationStatistics Valid=178, Invalid=2078, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 23:45:26,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-02 23:45:26,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2021-05-02 23:45:26,184 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) [2021-05-02 23:45:26,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2021-05-02 23:45:26,184 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 49 [2021-05-02 23:45:26,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:26,184 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2021-05-02 23:45:26,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 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) [2021-05-02 23:45:26,185 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2021-05-02 23:45:26,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 23:45:26,185 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:26,185 INFO L523 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:26,185 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-05-02 23:45:26,186 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:26,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:26,186 INFO L82 PathProgramCache]: Analyzing trace with hash 323049128, now seen corresponding path program 20 times [2021-05-02 23:45:26,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:26,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1318093003] [2021-05-02 23:45:26,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:26,192 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_294 1000000) InVars {main_~i~0=v_main_~i~0_294} OutVars{main_~i~0=v_main_~i~0_294} AuxVars[] AssignedVars[] [2021-05-02 23:45:26,194 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:26,195 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:26,200 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:26,215 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:26,228 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:26,229 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_296 999998) InVars {main_~i~0=v_main_~i~0_296} OutVars{main_~i~0=v_main_~i~0_296} AuxVars[] AssignedVars[] [2021-05-02 23:45:26,231 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:26,236 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:26,241 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:26,250 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:26,263 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:26,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:26,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:26,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:26,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:26,725 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:26,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1318093003] [2021-05-02 23:45:26,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1318093003] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:26,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:26,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-05-02 23:45:26,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477645435] [2021-05-02 23:45:26,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-02 23:45:26,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:26,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-02 23:45:26,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2021-05-02 23:45:26,727 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand has 28 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:27,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:27,651 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2021-05-02 23:45:27,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 23:45:27,652 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-05-02 23:45:27,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:27,652 INFO L225 Difference]: With dead ends: 60 [2021-05-02 23:45:27,652 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 23:45:27,653 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 846.8ms TimeCoverageRelationStatistics Valid=186, Invalid=2264, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 23:45:27,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 23:45:27,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2021-05-02 23:45:27,659 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) [2021-05-02 23:45:27,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2021-05-02 23:45:27,660 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 51 [2021-05-02 23:45:27,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:27,660 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2021-05-02 23:45:27,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:27,660 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2021-05-02 23:45:27,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-02 23:45:27,661 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:27,661 INFO L523 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:27,661 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-05-02 23:45:27,661 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:27,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:27,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1980405242, now seen corresponding path program 21 times [2021-05-02 23:45:27,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:27,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [242312916] [2021-05-02 23:45:27,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:27,666 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_319 1000000) InVars {main_~i~0=v_main_~i~0_319} OutVars{main_~i~0=v_main_~i~0_319} AuxVars[] AssignedVars[] [2021-05-02 23:45:27,667 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:27,668 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:27,673 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:27,686 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:27,697 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:27,698 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_321 999998) InVars {main_~i~0=v_main_~i~0_321} OutVars{main_~i~0=v_main_~i~0_321} AuxVars[] AssignedVars[] [2021-05-02 23:45:27,700 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:27,705 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:27,710 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:27,719 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:27,730 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:27,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:27,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:27,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:27,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:28,161 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:28,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [242312916] [2021-05-02 23:45:28,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [242312916] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:28,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:28,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2021-05-02 23:45:28,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026972839] [2021-05-02 23:45:28,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-02 23:45:28,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:28,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-02 23:45:28,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2021-05-02 23:45:28,163 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand has 29 states, 28 states have (on average 1.75) internal successors, (49), 27 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:29,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:29,135 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2021-05-02 23:45:29,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-02 23:45:29,135 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.75) internal successors, (49), 27 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2021-05-02 23:45:29,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:29,136 INFO L225 Difference]: With dead ends: 62 [2021-05-02 23:45:29,136 INFO L226 Difference]: Without dead ends: 57 [2021-05-02 23:45:29,137 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 6 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 882.4ms TimeCoverageRelationStatistics Valid=194, Invalid=2458, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 23:45:29,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-02 23:45:29,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2021-05-02 23:45:29,143 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) [2021-05-02 23:45:29,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2021-05-02 23:45:29,144 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 53 [2021-05-02 23:45:29,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:29,144 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2021-05-02 23:45:29,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 28 states have (on average 1.75) internal successors, (49), 27 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:29,144 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2021-05-02 23:45:29,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 23:45:29,145 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:29,145 INFO L523 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:29,145 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-05-02 23:45:29,145 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:29,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:29,145 INFO L82 PathProgramCache]: Analyzing trace with hash 603069924, now seen corresponding path program 22 times [2021-05-02 23:45:29,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:29,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2016002840] [2021-05-02 23:45:29,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:29,152 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_345 1000000) InVars {main_~i~0=v_main_~i~0_345} OutVars{main_~i~0=v_main_~i~0_345} AuxVars[] AssignedVars[] [2021-05-02 23:45:29,153 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:29,154 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:29,159 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:29,174 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:29,201 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:29,203 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_347 999998) InVars {main_~i~0=v_main_~i~0_347} OutVars{main_~i~0=v_main_~i~0_347} AuxVars[] AssignedVars[] [2021-05-02 23:45:29,205 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:29,211 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:29,219 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:29,228 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:29,241 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:29,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:29,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:29,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:29,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:29,702 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:29,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2016002840] [2021-05-02 23:45:29,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2016002840] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:29,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:29,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2021-05-02 23:45:29,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392953699] [2021-05-02 23:45:29,703 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 23:45:29,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:29,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 23:45:29,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2021-05-02 23:45:29,704 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand has 30 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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) [2021-05-02 23:45:30,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:30,774 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2021-05-02 23:45:30,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-02 23:45:30,774 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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 [2021-05-02 23:45:30,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:30,775 INFO L225 Difference]: With dead ends: 64 [2021-05-02 23:45:30,775 INFO L226 Difference]: Without dead ends: 59 [2021-05-02 23:45:30,776 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 942.2ms TimeCoverageRelationStatistics Valid=202, Invalid=2660, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 23:45:30,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-02 23:45:30,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2021-05-02 23:45:30,782 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) [2021-05-02 23:45:30,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2021-05-02 23:45:30,783 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 55 [2021-05-02 23:45:30,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:30,783 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2021-05-02 23:45:30,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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) [2021-05-02 23:45:30,783 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2021-05-02 23:45:30,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-02 23:45:30,784 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:30,784 INFO L523 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:30,784 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-05-02 23:45:30,784 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:30,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:30,784 INFO L82 PathProgramCache]: Analyzing trace with hash 831607362, now seen corresponding path program 23 times [2021-05-02 23:45:30,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:30,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1964503490] [2021-05-02 23:45:30,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:30,790 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_372 1000000) InVars {main_~i~0=v_main_~i~0_372} OutVars{main_~i~0=v_main_~i~0_372} AuxVars[] AssignedVars[] [2021-05-02 23:45:30,792 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:30,798 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:30,803 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:30,812 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:30,824 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:30,825 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_374 999998) InVars {main_~i~0=v_main_~i~0_374} OutVars{main_~i~0=v_main_~i~0_374} AuxVars[] AssignedVars[] [2021-05-02 23:45:30,830 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:30,831 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:30,838 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:30,851 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:30,873 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:30,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:30,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:30,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:30,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:31,332 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:31,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1964503490] [2021-05-02 23:45:31,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1964503490] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:31,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:31,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-05-02 23:45:31,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625144398] [2021-05-02 23:45:31,333 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-02 23:45:31,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:31,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-02 23:45:31,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2021-05-02 23:45:31,334 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand has 31 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:32,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:32,640 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2021-05-02 23:45:32,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-02 23:45:32,641 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2021-05-02 23:45:32,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:32,642 INFO L225 Difference]: With dead ends: 66 [2021-05-02 23:45:32,642 INFO L226 Difference]: Without dead ends: 61 [2021-05-02 23:45:32,643 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 1060.7ms TimeCoverageRelationStatistics Valid=210, Invalid=2870, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 23:45:32,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-02 23:45:32,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2021-05-02 23:45:32,651 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) [2021-05-02 23:45:32,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2021-05-02 23:45:32,651 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 57 [2021-05-02 23:45:32,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:32,652 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2021-05-02 23:45:32,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:32,652 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2021-05-02 23:45:32,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-02 23:45:32,652 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:32,652 INFO L523 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:32,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-05-02 23:45:32,652 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:32,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:32,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1412753184, now seen corresponding path program 24 times [2021-05-02 23:45:32,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:32,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1514031831] [2021-05-02 23:45:32,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:32,658 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_400 1000000) InVars {main_~i~0=v_main_~i~0_400} OutVars{main_~i~0=v_main_~i~0_400} AuxVars[] AssignedVars[] [2021-05-02 23:45:32,660 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:32,661 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:32,667 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:32,688 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:32,702 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:32,711 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_402 999998) InVars {main_~i~0=v_main_~i~0_402} OutVars{main_~i~0=v_main_~i~0_402} AuxVars[] AssignedVars[] [2021-05-02 23:45:32,712 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:32,720 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:32,727 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:32,740 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:32,757 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:32,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:32,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:32,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:32,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:33,329 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:33,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1514031831] [2021-05-02 23:45:33,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1514031831] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:33,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:33,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2021-05-02 23:45:33,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045290723] [2021-05-02 23:45:33,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 23:45:33,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:33,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 23:45:33,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 23:45:33,331 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand has 32 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:34,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:34,699 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2021-05-02 23:45:34,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-02 23:45:34,699 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2021-05-02 23:45:34,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:34,700 INFO L225 Difference]: With dead ends: 68 [2021-05-02 23:45:34,700 INFO L226 Difference]: Without dead ends: 63 [2021-05-02 23:45:34,702 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 1185.0ms TimeCoverageRelationStatistics Valid=218, Invalid=3088, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 23:45:34,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-02 23:45:34,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2021-05-02 23:45:34,710 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) [2021-05-02 23:45:34,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2021-05-02 23:45:34,711 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 59 [2021-05-02 23:45:34,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:34,711 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2021-05-02 23:45:34,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:34,711 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2021-05-02 23:45:34,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 23:45:34,711 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:34,712 INFO L523 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:34,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-05-02 23:45:34,712 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:34,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:34,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1548139646, now seen corresponding path program 25 times [2021-05-02 23:45:34,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:34,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1366876056] [2021-05-02 23:45:34,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:34,734 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_429 1000000) InVars {main_~i~0=v_main_~i~0_429} OutVars{main_~i~0=v_main_~i~0_429} AuxVars[] AssignedVars[] [2021-05-02 23:45:34,735 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:34,744 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:34,751 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:34,766 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:34,782 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:34,784 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_431 999998) InVars {main_~i~0=v_main_~i~0_431} OutVars{main_~i~0=v_main_~i~0_431} AuxVars[] AssignedVars[] [2021-05-02 23:45:34,786 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:34,788 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:34,795 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:34,816 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:34,833 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:34,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:34,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:34,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:34,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:35,441 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:35,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1366876056] [2021-05-02 23:45:35,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1366876056] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:35,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:35,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2021-05-02 23:45:35,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301248935] [2021-05-02 23:45:35,442 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-02 23:45:35,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:35,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-02 23:45:35,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 23:45:35,445 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand has 33 states, 32 states have (on average 1.78125) internal successors, (57), 31 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) [2021-05-02 23:45:36,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:36,885 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2021-05-02 23:45:36,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-02 23:45:36,886 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.78125) internal successors, (57), 31 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 [2021-05-02 23:45:36,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:36,886 INFO L225 Difference]: With dead ends: 70 [2021-05-02 23:45:36,887 INFO L226 Difference]: Without dead ends: 65 [2021-05-02 23:45:36,888 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 1242.0ms TimeCoverageRelationStatistics Valid=226, Invalid=3314, Unknown=0, NotChecked=0, Total=3540 [2021-05-02 23:45:36,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-02 23:45:36,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2021-05-02 23:45:36,896 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) [2021-05-02 23:45:36,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2021-05-02 23:45:36,896 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 61 [2021-05-02 23:45:36,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:36,897 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2021-05-02 23:45:36,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 32 states have (on average 1.78125) internal successors, (57), 31 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) [2021-05-02 23:45:36,897 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2021-05-02 23:45:36,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-02 23:45:36,897 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:36,897 INFO L523 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:36,898 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-05-02 23:45:36,898 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:36,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:36,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1489456548, now seen corresponding path program 26 times [2021-05-02 23:45:36,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:36,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [737489529] [2021-05-02 23:45:36,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:36,904 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_459 1000000) InVars {main_~i~0=v_main_~i~0_459} OutVars{main_~i~0=v_main_~i~0_459} AuxVars[] AssignedVars[] [2021-05-02 23:45:36,906 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:36,913 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:36,919 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:36,933 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:36,948 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:36,950 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_461 999998) InVars {main_~i~0=v_main_~i~0_461} OutVars{main_~i~0=v_main_~i~0_461} AuxVars[] AssignedVars[] [2021-05-02 23:45:36,952 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:36,953 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:36,959 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:36,982 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:36,999 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:37,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:37,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:37,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:37,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:37,736 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:37,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [737489529] [2021-05-02 23:45:37,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [737489529] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:37,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:37,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2021-05-02 23:45:37,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781477536] [2021-05-02 23:45:37,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-02 23:45:37,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:37,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-02 23:45:37,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 23:45:37,738 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand has 34 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:39,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:39,231 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2021-05-02 23:45:39,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-02 23:45:39,232 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2021-05-02 23:45:39,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:39,233 INFO L225 Difference]: With dead ends: 72 [2021-05-02 23:45:39,233 INFO L226 Difference]: Without dead ends: 67 [2021-05-02 23:45:39,234 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 24 SyntacticMatches, 6 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 1399.3ms TimeCoverageRelationStatistics Valid=234, Invalid=3548, Unknown=0, NotChecked=0, Total=3782 [2021-05-02 23:45:39,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-05-02 23:45:39,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2021-05-02 23:45:39,244 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) [2021-05-02 23:45:39,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2021-05-02 23:45:39,245 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 63 [2021-05-02 23:45:39,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:39,245 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2021-05-02 23:45:39,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:39,245 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2021-05-02 23:45:39,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-02 23:45:39,246 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:39,246 INFO L523 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:39,246 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-05-02 23:45:39,246 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:39,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:39,246 INFO L82 PathProgramCache]: Analyzing trace with hash -41637702, now seen corresponding path program 27 times [2021-05-02 23:45:39,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:39,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [442313240] [2021-05-02 23:45:39,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:39,252 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_490 1000000) InVars {main_~i~0=v_main_~i~0_490} OutVars{main_~i~0=v_main_~i~0_490} AuxVars[] AssignedVars[] [2021-05-02 23:45:39,255 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:39,271 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:39,278 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:39,291 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:39,307 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:39,309 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_492 999998) InVars {main_~i~0=v_main_~i~0_492} OutVars{main_~i~0=v_main_~i~0_492} AuxVars[] AssignedVars[] [2021-05-02 23:45:39,311 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:39,318 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:39,324 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:39,336 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:39,350 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:39,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:39,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:39,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:39,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:40,045 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:40,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [442313240] [2021-05-02 23:45:40,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [442313240] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:40,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:40,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2021-05-02 23:45:40,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178710697] [2021-05-02 23:45:40,046 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-02 23:45:40,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:40,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-02 23:45:40,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1159, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 23:45:40,047 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand has 35 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:41,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:41,482 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2021-05-02 23:45:41,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-02 23:45:41,484 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2021-05-02 23:45:41,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:41,484 INFO L225 Difference]: With dead ends: 74 [2021-05-02 23:45:41,484 INFO L226 Difference]: Without dead ends: 69 [2021-05-02 23:45:41,485 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 24 SyntacticMatches, 7 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 1330.2ms TimeCoverageRelationStatistics Valid=242, Invalid=3790, Unknown=0, NotChecked=0, Total=4032 [2021-05-02 23:45:41,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-02 23:45:41,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2021-05-02 23:45:41,493 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) [2021-05-02 23:45:41,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2021-05-02 23:45:41,494 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 65 [2021-05-02 23:45:41,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:41,494 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2021-05-02 23:45:41,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:41,494 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2021-05-02 23:45:41,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-02 23:45:41,495 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:41,495 INFO L523 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:41,495 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-05-02 23:45:41,495 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:41,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:41,495 INFO L82 PathProgramCache]: Analyzing trace with hash -257130600, now seen corresponding path program 28 times [2021-05-02 23:45:41,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:41,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [104917300] [2021-05-02 23:45:41,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:41,500 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_522 1000000) InVars {main_~i~0=v_main_~i~0_522} OutVars{main_~i~0=v_main_~i~0_522} AuxVars[] AssignedVars[] [2021-05-02 23:45:41,503 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:41,508 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:41,513 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:41,522 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:41,535 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:41,537 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_524 999998) InVars {main_~i~0=v_main_~i~0_524} OutVars{main_~i~0=v_main_~i~0_524} AuxVars[] AssignedVars[] [2021-05-02 23:45:41,538 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:41,539 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:41,544 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:41,561 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:41,573 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:41,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:41,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:41,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:41,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:42,205 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:42,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [104917300] [2021-05-02 23:45:42,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [104917300] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:42,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:42,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2021-05-02 23:45:42,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989628340] [2021-05-02 23:45:42,206 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-02 23:45:42,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:42,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-02 23:45:42,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 23:45:42,207 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand has 36 states, 35 states have (on average 1.8) internal successors, (63), 34 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) [2021-05-02 23:45:43,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:43,897 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2021-05-02 23:45:43,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-02 23:45:43,898 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.8) internal successors, (63), 34 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 [2021-05-02 23:45:43,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:43,899 INFO L225 Difference]: With dead ends: 76 [2021-05-02 23:45:43,899 INFO L226 Difference]: Without dead ends: 71 [2021-05-02 23:45:43,900 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 1387.5ms TimeCoverageRelationStatistics Valid=250, Invalid=4040, Unknown=0, NotChecked=0, Total=4290 [2021-05-02 23:45:43,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-05-02 23:45:43,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2021-05-02 23:45:43,910 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) [2021-05-02 23:45:43,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2021-05-02 23:45:43,910 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 67 [2021-05-02 23:45:43,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:43,911 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2021-05-02 23:45:43,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 35 states have (on average 1.8) internal successors, (63), 34 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) [2021-05-02 23:45:43,911 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2021-05-02 23:45:43,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 23:45:43,911 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:43,911 INFO L523 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:43,912 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-05-02 23:45:43,912 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:43,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:43,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1187375370, now seen corresponding path program 29 times [2021-05-02 23:45:43,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:43,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [204079137] [2021-05-02 23:45:43,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:43,917 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_555 1000000) InVars {main_~i~0=v_main_~i~0_555} OutVars{main_~i~0=v_main_~i~0_555} AuxVars[] AssignedVars[] [2021-05-02 23:45:43,919 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:43,920 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:43,927 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:43,948 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:43,963 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:43,965 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_557 999998) InVars {main_~i~0=v_main_~i~0_557} OutVars{main_~i~0=v_main_~i~0_557} AuxVars[] AssignedVars[] [2021-05-02 23:45:43,966 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:43,975 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:43,982 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:43,996 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:44,013 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:44,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:44,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:44,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:44,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:44,720 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:44,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [204079137] [2021-05-02 23:45:44,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [204079137] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:44,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:44,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2021-05-02 23:45:44,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157649955] [2021-05-02 23:45:44,721 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-02 23:45:44,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:44,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-02 23:45:44,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1299, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 23:45:44,722 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand has 37 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 35 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:46,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:46,504 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2021-05-02 23:45:46,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-02 23:45:46,504 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 35 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2021-05-02 23:45:46,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:46,505 INFO L225 Difference]: With dead ends: 78 [2021-05-02 23:45:46,505 INFO L226 Difference]: Without dead ends: 73 [2021-05-02 23:45:46,506 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 1515.5ms TimeCoverageRelationStatistics Valid=258, Invalid=4298, Unknown=0, NotChecked=0, Total=4556 [2021-05-02 23:45:46,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-02 23:45:46,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2021-05-02 23:45:46,516 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) [2021-05-02 23:45:46,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2021-05-02 23:45:46,517 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 69 [2021-05-02 23:45:46,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:46,517 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2021-05-02 23:45:46,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 35 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:46,517 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2021-05-02 23:45:46,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-02 23:45:46,518 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:46,518 INFO L523 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:46,518 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-05-02 23:45:46,518 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:46,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:46,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1799401772, now seen corresponding path program 30 times [2021-05-02 23:45:46,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:46,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674629460] [2021-05-02 23:45:46,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:46,524 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_589 1000000) InVars {main_~i~0=v_main_~i~0_589} OutVars{main_~i~0=v_main_~i~0_589} AuxVars[] AssignedVars[] [2021-05-02 23:45:46,526 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:46,527 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:46,533 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:46,555 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:46,569 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:46,571 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_591 999998) InVars {main_~i~0=v_main_~i~0_591} OutVars{main_~i~0=v_main_~i~0_591} AuxVars[] AssignedVars[] [2021-05-02 23:45:46,573 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:46,580 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:46,587 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:46,607 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:46,622 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:46,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:46,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:46,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:46,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:47,382 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:47,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674629460] [2021-05-02 23:45:47,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1674629460] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:47,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:47,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2021-05-02 23:45:47,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648923217] [2021-05-02 23:45:47,383 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-02 23:45:47,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:47,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-02 23:45:47,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 23:45:47,384 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:49,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:49,299 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2021-05-02 23:45:49,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-02 23:45:49,300 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2021-05-02 23:45:49,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:49,301 INFO L225 Difference]: With dead ends: 80 [2021-05-02 23:45:49,301 INFO L226 Difference]: Without dead ends: 75 [2021-05-02 23:45:49,301 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 1606.8ms TimeCoverageRelationStatistics Valid=266, Invalid=4564, Unknown=0, NotChecked=0, Total=4830 [2021-05-02 23:45:49,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-02 23:45:49,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2021-05-02 23:45:49,312 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) [2021-05-02 23:45:49,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2021-05-02 23:45:49,313 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 71 [2021-05-02 23:45:49,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:49,313 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2021-05-02 23:45:49,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:49,313 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2021-05-02 23:45:49,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-02 23:45:49,314 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:49,314 INFO L523 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:49,314 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-05-02 23:45:49,314 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:49,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:49,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1546254542, now seen corresponding path program 31 times [2021-05-02 23:45:49,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:49,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [412962169] [2021-05-02 23:45:49,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:49,321 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_624 1000000) InVars {main_~i~0=v_main_~i~0_624} OutVars{main_~i~0=v_main_~i~0_624} AuxVars[] AssignedVars[] [2021-05-02 23:45:49,323 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:49,324 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:49,332 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:49,355 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:49,369 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:49,371 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_626 999998) InVars {main_~i~0=v_main_~i~0_626} OutVars{main_~i~0=v_main_~i~0_626} AuxVars[] AssignedVars[] [2021-05-02 23:45:49,373 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:49,380 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:49,387 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:49,400 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:49,415 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:49,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:49,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:49,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:49,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:50,239 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:50,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [412962169] [2021-05-02 23:45:50,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [412962169] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:50,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:50,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2021-05-02 23:45:50,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136162760] [2021-05-02 23:45:50,240 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-02 23:45:50,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:50,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-02 23:45:50,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1447, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 23:45:50,241 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand has 39 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 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) [2021-05-02 23:45:52,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:52,227 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2021-05-02 23:45:52,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-02 23:45:52,228 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 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 [2021-05-02 23:45:52,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:52,228 INFO L225 Difference]: With dead ends: 82 [2021-05-02 23:45:52,229 INFO L226 Difference]: Without dead ends: 77 [2021-05-02 23:45:52,229 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 27 SyntacticMatches, 8 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 1687.3ms TimeCoverageRelationStatistics Valid=274, Invalid=4838, Unknown=0, NotChecked=0, Total=5112 [2021-05-02 23:45:52,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-02 23:45:52,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2021-05-02 23:45:52,240 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) [2021-05-02 23:45:52,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2021-05-02 23:45:52,241 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 73 [2021-05-02 23:45:52,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:52,242 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2021-05-02 23:45:52,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 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) [2021-05-02 23:45:52,242 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2021-05-02 23:45:52,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 23:45:52,242 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:52,243 INFO L523 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:52,243 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-05-02 23:45:52,243 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:52,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:52,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1210064912, now seen corresponding path program 32 times [2021-05-02 23:45:52,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:52,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988827001] [2021-05-02 23:45:52,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:52,249 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_660 1000000) InVars {main_~i~0=v_main_~i~0_660} OutVars{main_~i~0=v_main_~i~0_660} AuxVars[] AssignedVars[] [2021-05-02 23:45:52,251 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:52,253 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:52,259 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:52,280 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:52,294 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:52,296 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_662 999998) InVars {main_~i~0=v_main_~i~0_662} OutVars{main_~i~0=v_main_~i~0_662} AuxVars[] AssignedVars[] [2021-05-02 23:45:52,298 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:52,299 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:52,305 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:52,329 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:52,345 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:52,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:52,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:52,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:52,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:53,243 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:53,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988827001] [2021-05-02 23:45:53,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1988827001] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:53,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:53,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2021-05-02 23:45:53,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835497003] [2021-05-02 23:45:53,245 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-02 23:45:53,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:53,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-02 23:45:53,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1524, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 23:45:53,246 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand has 40 states, 39 states have (on average 1.8205128205128205) internal successors, (71), 38 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:55,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:55,388 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2021-05-02 23:45:55,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-02 23:45:55,388 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.8205128205128205) internal successors, (71), 38 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2021-05-02 23:45:55,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:55,389 INFO L225 Difference]: With dead ends: 84 [2021-05-02 23:45:55,389 INFO L226 Difference]: Without dead ends: 79 [2021-05-02 23:45:55,390 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 27 SyntacticMatches, 9 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 1867.4ms TimeCoverageRelationStatistics Valid=282, Invalid=5120, Unknown=0, NotChecked=0, Total=5402 [2021-05-02 23:45:55,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-02 23:45:55,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2021-05-02 23:45:55,401 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) [2021-05-02 23:45:55,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2021-05-02 23:45:55,402 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 75 [2021-05-02 23:45:55,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:55,402 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2021-05-02 23:45:55,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 39 states have (on average 1.8205128205128205) internal successors, (71), 38 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:55,402 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2021-05-02 23:45:55,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-02 23:45:55,403 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:55,403 INFO L523 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:55,403 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-05-02 23:45:55,403 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:55,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:55,404 INFO L82 PathProgramCache]: Analyzing trace with hash 38238574, now seen corresponding path program 33 times [2021-05-02 23:45:55,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:55,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1859314174] [2021-05-02 23:45:55,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:55,411 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_697 1000000) InVars {main_~i~0=v_main_~i~0_697} OutVars{main_~i~0=v_main_~i~0_697} AuxVars[] AssignedVars[] [2021-05-02 23:45:55,415 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:55,422 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:55,432 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:55,452 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:55,471 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:55,480 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_699 999998) InVars {main_~i~0=v_main_~i~0_699} OutVars{main_~i~0=v_main_~i~0_699} AuxVars[] AssignedVars[] [2021-05-02 23:45:55,486 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:55,494 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:55,501 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:55,515 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:55,546 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:55,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:55,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:55,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:55,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:56,402 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:56,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1859314174] [2021-05-02 23:45:56,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1859314174] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:56,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:56,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2021-05-02 23:45:56,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967835723] [2021-05-02 23:45:56,403 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-02 23:45:56,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:56,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-02 23:45:56,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1603, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 23:45:56,404 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand has 41 states, 40 states have (on average 1.825) internal successors, (73), 39 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:58,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:58,637 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2021-05-02 23:45:58,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-02 23:45:58,638 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.825) internal successors, (73), 39 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2021-05-02 23:45:58,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:58,639 INFO L225 Difference]: With dead ends: 86 [2021-05-02 23:45:58,639 INFO L226 Difference]: Without dead ends: 81 [2021-05-02 23:45:58,640 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 1835.1ms TimeCoverageRelationStatistics Valid=290, Invalid=5410, Unknown=0, NotChecked=0, Total=5700 [2021-05-02 23:45:58,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-02 23:45:58,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2021-05-02 23:45:58,651 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) [2021-05-02 23:45:58,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2021-05-02 23:45:58,652 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 77 [2021-05-02 23:45:58,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:58,652 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2021-05-02 23:45:58,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 40 states have (on average 1.825) internal successors, (73), 39 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:58,652 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2021-05-02 23:45:58,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-02 23:45:58,653 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:58,653 INFO L523 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:58,653 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-05-02 23:45:58,653 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:58,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:58,653 INFO L82 PathProgramCache]: Analyzing trace with hash -805440692, now seen corresponding path program 34 times [2021-05-02 23:45:58,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:58,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2113141615] [2021-05-02 23:45:58,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:58,659 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_735 1000000) InVars {main_~i~0=v_main_~i~0_735} OutVars{main_~i~0=v_main_~i~0_735} AuxVars[] AssignedVars[] [2021-05-02 23:45:58,660 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:58,662 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:58,668 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:58,687 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:58,700 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:58,702 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_737 999998) InVars {main_~i~0=v_main_~i~0_737} OutVars{main_~i~0=v_main_~i~0_737} AuxVars[] AssignedVars[] [2021-05-02 23:45:58,704 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:45:58,711 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:58,718 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:45:58,731 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:45:58,746 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:58,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:58,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:58,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:58,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:59,706 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:59,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2113141615] [2021-05-02 23:45:59,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2113141615] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:59,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:59,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2021-05-02 23:45:59,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635112718] [2021-05-02 23:45:59,707 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-02 23:45:59,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:59,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-02 23:45:59,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1684, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 23:45:59,708 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand has 42 states, 41 states have (on average 1.829268292682927) internal successors, (75), 40 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) [2021-05-02 23:46:02,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:46:02,045 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2021-05-02 23:46:02,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-02 23:46:02,046 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 1.829268292682927) internal successors, (75), 40 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 [2021-05-02 23:46:02,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:46:02,047 INFO L225 Difference]: With dead ends: 88 [2021-05-02 23:46:02,047 INFO L226 Difference]: Without dead ends: 83 [2021-05-02 23:46:02,048 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 29 SyntacticMatches, 9 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 2010.8ms TimeCoverageRelationStatistics Valid=298, Invalid=5708, Unknown=0, NotChecked=0, Total=6006 [2021-05-02 23:46:02,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-05-02 23:46:02,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2021-05-02 23:46:02,060 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) [2021-05-02 23:46:02,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2021-05-02 23:46:02,060 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 79 [2021-05-02 23:46:02,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:46:02,061 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2021-05-02 23:46:02,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 41 states have (on average 1.829268292682927) internal successors, (75), 40 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) [2021-05-02 23:46:02,061 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2021-05-02 23:46:02,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-05-02 23:46:02,061 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:46:02,061 INFO L523 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:46:02,062 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-05-02 23:46:02,062 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:46:02,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:46:02,062 INFO L82 PathProgramCache]: Analyzing trace with hash 167603626, now seen corresponding path program 35 times [2021-05-02 23:46:02,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:46:02,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493821485] [2021-05-02 23:46:02,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:46:02,067 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_774 1000000) InVars {main_~i~0=v_main_~i~0_774} OutVars{main_~i~0=v_main_~i~0_774} AuxVars[] AssignedVars[] [2021-05-02 23:46:02,069 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:46:02,076 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:02,082 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:46:02,096 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:46:02,112 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:46:02,114 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_776 999998) InVars {main_~i~0=v_main_~i~0_776} OutVars{main_~i~0=v_main_~i~0_776} AuxVars[] AssignedVars[] [2021-05-02 23:46:02,116 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:46:02,118 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:02,127 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:46:02,150 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:46:02,166 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:46:02,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:02,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:46:02,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:02,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:46:03,162 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:46:03,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [493821485] [2021-05-02 23:46:03,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [493821485] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:46:03,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:46:03,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2021-05-02 23:46:03,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672255565] [2021-05-02 23:46:03,163 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-02 23:46:03,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:46:03,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-02 23:46:03,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1767, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 23:46:03,164 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand has 43 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:05,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:46:05,564 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2021-05-02 23:46:05,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-02 23:46:05,565 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2021-05-02 23:46:05,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:46:05,566 INFO L225 Difference]: With dead ends: 90 [2021-05-02 23:46:05,566 INFO L226 Difference]: Without dead ends: 85 [2021-05-02 23:46:05,567 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 30 SyntacticMatches, 9 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 2097.5ms TimeCoverageRelationStatistics Valid=306, Invalid=6014, Unknown=0, NotChecked=0, Total=6320 [2021-05-02 23:46:05,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-02 23:46:05,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2021-05-02 23:46:05,580 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) [2021-05-02 23:46:05,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2021-05-02 23:46:05,581 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 81 [2021-05-02 23:46:05,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:46:05,581 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2021-05-02 23:46:05,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:05,581 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2021-05-02 23:46:05,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-05-02 23:46:05,582 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:46:05,582 INFO L523 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:46:05,582 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-05-02 23:46:05,582 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:46:05,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:46:05,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1039677304, now seen corresponding path program 36 times [2021-05-02 23:46:05,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:46:05,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1357713851] [2021-05-02 23:46:05,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:46:05,595 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_814 1000000) InVars {main_~i~0=v_main_~i~0_814} OutVars{main_~i~0=v_main_~i~0_814} AuxVars[] AssignedVars[] [2021-05-02 23:46:05,597 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:46:05,598 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:05,604 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:46:05,626 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:46:05,643 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:46:05,645 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_816 999998) InVars {main_~i~0=v_main_~i~0_816} OutVars{main_~i~0=v_main_~i~0_816} AuxVars[] AssignedVars[] [2021-05-02 23:46:05,647 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:46:05,667 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:05,674 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:46:05,688 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:46:05,703 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:46:05,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:05,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:46:05,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:05,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:46:06,787 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:46:06,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1357713851] [2021-05-02 23:46:06,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1357713851] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:46:06,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:46:06,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2021-05-02 23:46:06,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740903957] [2021-05-02 23:46:06,788 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-02 23:46:06,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:46:06,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-02 23:46:06,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1852, Unknown=0, NotChecked=0, Total=1980 [2021-05-02 23:46:06,789 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand has 44 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 42 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:09,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:46:09,344 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2021-05-02 23:46:09,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-02 23:46:09,345 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 42 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2021-05-02 23:46:09,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:46:09,346 INFO L225 Difference]: With dead ends: 92 [2021-05-02 23:46:09,346 INFO L226 Difference]: Without dead ends: 87 [2021-05-02 23:46:09,347 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 32 SyntacticMatches, 8 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 2204.1ms TimeCoverageRelationStatistics Valid=314, Invalid=6328, Unknown=0, NotChecked=0, Total=6642 [2021-05-02 23:46:09,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-05-02 23:46:09,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2021-05-02 23:46:09,370 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) [2021-05-02 23:46:09,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2021-05-02 23:46:09,370 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 83 [2021-05-02 23:46:09,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:46:09,371 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2021-05-02 23:46:09,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 42 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:09,371 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2021-05-02 23:46:09,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-02 23:46:09,371 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:46:09,372 INFO L523 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:46:09,372 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-05-02 23:46:09,372 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:46:09,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:46:09,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1595481114, now seen corresponding path program 37 times [2021-05-02 23:46:09,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:46:09,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1893042403] [2021-05-02 23:46:09,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:46:09,378 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_855 1000000) InVars {main_~i~0=v_main_~i~0_855} OutVars{main_~i~0=v_main_~i~0_855} AuxVars[] AssignedVars[] [2021-05-02 23:46:09,380 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:46:09,382 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:09,387 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:46:09,412 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:46:09,428 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:46:09,430 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_857 999998) InVars {main_~i~0=v_main_~i~0_857} OutVars{main_~i~0=v_main_~i~0_857} AuxVars[] AssignedVars[] [2021-05-02 23:46:09,432 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:46:09,441 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:09,449 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:46:09,464 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:46:09,481 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:46:09,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:09,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:46:09,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:09,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:46:10,732 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:46:10,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1893042403] [2021-05-02 23:46:10,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1893042403] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:46:10,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:46:10,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2021-05-02 23:46:10,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935554668] [2021-05-02 23:46:10,733 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-05-02 23:46:10,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:46:10,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-05-02 23:46:10,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1939, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 23:46:10,734 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand has 45 states, 44 states have (on average 1.8409090909090908) internal successors, (81), 43 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) [2021-05-02 23:46:13,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:46:13,452 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2021-05-02 23:46:13,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-02 23:46:13,453 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 1.8409090909090908) internal successors, (81), 43 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 [2021-05-02 23:46:13,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:46:13,453 INFO L225 Difference]: With dead ends: 94 [2021-05-02 23:46:13,453 INFO L226 Difference]: Without dead ends: 89 [2021-05-02 23:46:13,454 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 28 SyntacticMatches, 13 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 2462.4ms TimeCoverageRelationStatistics Valid=322, Invalid=6650, Unknown=0, NotChecked=0, Total=6972 [2021-05-02 23:46:13,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-02 23:46:13,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2021-05-02 23:46:13,467 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) [2021-05-02 23:46:13,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2021-05-02 23:46:13,468 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 85 [2021-05-02 23:46:13,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:46:13,468 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2021-05-02 23:46:13,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 45 states, 44 states have (on average 1.8409090909090908) internal successors, (81), 43 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) [2021-05-02 23:46:13,468 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2021-05-02 23:46:13,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 23:46:13,469 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:46:13,469 INFO L523 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:46:13,469 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-05-02 23:46:13,469 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:46:13,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:46:13,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1147969476, now seen corresponding path program 38 times [2021-05-02 23:46:13,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:46:13,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1493977647] [2021-05-02 23:46:13,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:46:13,475 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_897 1000000) InVars {main_~i~0=v_main_~i~0_897} OutVars{main_~i~0=v_main_~i~0_897} AuxVars[] AssignedVars[] [2021-05-02 23:46:13,476 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:46:13,478 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:13,484 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:46:13,506 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:46:13,523 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:46:13,525 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_899 999998) InVars {main_~i~0=v_main_~i~0_899} OutVars{main_~i~0=v_main_~i~0_899} AuxVars[] AssignedVars[] [2021-05-02 23:46:13,527 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:46:13,529 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:13,536 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:46:13,559 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:46:13,575 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:46:13,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:13,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:46:13,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:13,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:46:14,834 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:46:14,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1493977647] [2021-05-02 23:46:14,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1493977647] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:46:14,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:46:14,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2021-05-02 23:46:14,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894295317] [2021-05-02 23:46:14,836 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-02 23:46:14,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:46:14,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-02 23:46:14,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2028, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 23:46:14,837 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand has 46 states, 45 states have (on average 1.8444444444444446) internal successors, (83), 44 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:17,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:46:17,727 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2021-05-02 23:46:17,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-02 23:46:17,728 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 1.8444444444444446) internal successors, (83), 44 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2021-05-02 23:46:17,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:46:17,729 INFO L225 Difference]: With dead ends: 96 [2021-05-02 23:46:17,729 INFO L226 Difference]: Without dead ends: 91 [2021-05-02 23:46:17,730 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 29 SyntacticMatches, 13 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 2553.8ms TimeCoverageRelationStatistics Valid=330, Invalid=6980, Unknown=0, NotChecked=0, Total=7310 [2021-05-02 23:46:17,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-05-02 23:46:17,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2021-05-02 23:46:17,743 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) [2021-05-02 23:46:17,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2021-05-02 23:46:17,744 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 87 [2021-05-02 23:46:17,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:46:17,744 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2021-05-02 23:46:17,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 45 states have (on average 1.8444444444444446) internal successors, (83), 44 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:17,745 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2021-05-02 23:46:17,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-02 23:46:17,745 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:46:17,745 INFO L523 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:46:17,745 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-05-02 23:46:17,746 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:46:17,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:46:17,746 INFO L82 PathProgramCache]: Analyzing trace with hash 494066722, now seen corresponding path program 39 times [2021-05-02 23:46:17,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:46:17,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1624367540] [2021-05-02 23:46:17,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:46:17,752 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_940 1000000) InVars {main_~i~0=v_main_~i~0_940} OutVars{main_~i~0=v_main_~i~0_940} AuxVars[] AssignedVars[] [2021-05-02 23:46:17,754 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:46:17,762 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:17,768 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:46:17,781 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:46:17,796 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:46:17,798 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_942 999998) InVars {main_~i~0=v_main_~i~0_942} OutVars{main_~i~0=v_main_~i~0_942} AuxVars[] AssignedVars[] [2021-05-02 23:46:17,800 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:46:17,801 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:17,807 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:46:17,825 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:46:17,839 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:46:17,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:17,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:46:17,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:17,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:46:19,051 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:46:19,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1624367540] [2021-05-02 23:46:19,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1624367540] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:46:19,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:46:19,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-05-02 23:46:19,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826353002] [2021-05-02 23:46:19,051 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-02 23:46:19,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:46:19,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-02 23:46:19,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2119, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 23:46:19,052 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand has 47 states, 46 states have (on average 1.8478260869565217) internal successors, (85), 45 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:22,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:46:22,053 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2021-05-02 23:46:22,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-02 23:46:22,054 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.8478260869565217) internal successors, (85), 45 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2021-05-02 23:46:22,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:46:22,055 INFO L225 Difference]: With dead ends: 98 [2021-05-02 23:46:22,055 INFO L226 Difference]: Without dead ends: 93 [2021-05-02 23:46:22,056 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 33 SyntacticMatches, 10 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 2568.1ms TimeCoverageRelationStatistics Valid=338, Invalid=7318, Unknown=0, NotChecked=0, Total=7656 [2021-05-02 23:46:22,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-02 23:46:22,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-05-02 23:46:22,069 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) [2021-05-02 23:46:22,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2021-05-02 23:46:22,070 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 89 [2021-05-02 23:46:22,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:46:22,070 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2021-05-02 23:46:22,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 46 states have (on average 1.8478260869565217) internal successors, (85), 45 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:22,070 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2021-05-02 23:46:22,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-02 23:46:22,070 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:46:22,071 INFO L523 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:46:22,071 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-05-02 23:46:22,071 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:46:22,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:46:22,071 INFO L82 PathProgramCache]: Analyzing trace with hash -841254656, now seen corresponding path program 40 times [2021-05-02 23:46:22,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:46:22,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1162831317] [2021-05-02 23:46:22,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:46:22,076 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_984 1000000) InVars {main_~i~0=v_main_~i~0_984} OutVars{main_~i~0=v_main_~i~0_984} AuxVars[] AssignedVars[] [2021-05-02 23:46:22,079 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:46:22,087 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:22,093 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:46:22,107 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:46:22,123 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:46:22,125 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_986 999998) InVars {main_~i~0=v_main_~i~0_986} OutVars{main_~i~0=v_main_~i~0_986} AuxVars[] AssignedVars[] [2021-05-02 23:46:22,127 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:46:22,136 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:22,143 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:46:22,159 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:46:22,175 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:46:22,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:22,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:46:22,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:22,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:46:23,479 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:46:23,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1162831317] [2021-05-02 23:46:23,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1162831317] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:46:23,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:46:23,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2021-05-02 23:46:23,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506750337] [2021-05-02 23:46:23,480 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-02 23:46:23,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:46:23,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-02 23:46:23,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2212, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 23:46:23,481 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand has 48 states, 47 states have (on average 1.851063829787234) internal successors, (87), 46 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) [2021-05-02 23:46:26,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:46:26,667 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2021-05-02 23:46:26,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-02 23:46:26,667 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 1.851063829787234) internal successors, (87), 46 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 [2021-05-02 23:46:26,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:46:26,668 INFO L225 Difference]: With dead ends: 100 [2021-05-02 23:46:26,668 INFO L226 Difference]: Without dead ends: 95 [2021-05-02 23:46:26,669 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 35 SyntacticMatches, 9 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 925 ImplicationChecksByTransitivity, 2744.7ms TimeCoverageRelationStatistics Valid=346, Invalid=7664, Unknown=0, NotChecked=0, Total=8010 [2021-05-02 23:46:26,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-05-02 23:46:26,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2021-05-02 23:46:26,683 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) [2021-05-02 23:46:26,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2021-05-02 23:46:26,683 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 91 [2021-05-02 23:46:26,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:46:26,684 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2021-05-02 23:46:26,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 47 states have (on average 1.851063829787234) internal successors, (87), 46 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) [2021-05-02 23:46:26,684 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2021-05-02 23:46:26,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-05-02 23:46:26,684 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:46:26,684 INFO L523 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:46:26,684 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-05-02 23:46:26,684 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:46:26,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:46:26,685 INFO L82 PathProgramCache]: Analyzing trace with hash 110122590, now seen corresponding path program 41 times [2021-05-02 23:46:26,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:46:26,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1894440823] [2021-05-02 23:46:26,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:46:26,690 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1029 1000000) InVars {main_~i~0=v_main_~i~0_1029} OutVars{main_~i~0=v_main_~i~0_1029} AuxVars[] AssignedVars[] [2021-05-02 23:46:26,705 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:46:26,712 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:26,717 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:46:26,728 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:46:26,744 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:46:26,747 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1031 999998) InVars {main_~i~0=v_main_~i~0_1031} OutVars{main_~i~0=v_main_~i~0_1031} AuxVars[] AssignedVars[] [2021-05-02 23:46:26,749 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:46:26,756 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:26,763 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:46:26,777 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:46:26,794 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:46:26,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:26,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:46:26,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:26,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:46:28,105 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:46:28,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1894440823] [2021-05-02 23:46:28,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1894440823] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:46:28,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:46:28,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2021-05-02 23:46:28,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225010614] [2021-05-02 23:46:28,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-05-02 23:46:28,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:46:28,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-05-02 23:46:28,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2307, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 23:46:28,107 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand has 49 states, 48 states have (on average 1.8541666666666667) internal successors, (89), 47 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:31,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:46:31,571 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2021-05-02 23:46:31,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-02 23:46:31,572 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 1.8541666666666667) internal successors, (89), 47 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2021-05-02 23:46:31,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:46:31,573 INFO L225 Difference]: With dead ends: 102 [2021-05-02 23:46:31,573 INFO L226 Difference]: Without dead ends: 97 [2021-05-02 23:46:31,574 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 37 SyntacticMatches, 8 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 2872.0ms TimeCoverageRelationStatistics Valid=354, Invalid=8018, Unknown=0, NotChecked=0, Total=8372 [2021-05-02 23:46:31,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-05-02 23:46:31,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2021-05-02 23:46:31,588 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) [2021-05-02 23:46:31,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2021-05-02 23:46:31,589 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 93 [2021-05-02 23:46:31,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:46:31,589 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2021-05-02 23:46:31,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 49 states, 48 states have (on average 1.8541666666666667) internal successors, (89), 47 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:31,589 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2021-05-02 23:46:31,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-02 23:46:31,589 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:46:31,590 INFO L523 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:46:31,590 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-05-02 23:46:31,590 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:46:31,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:46:31,590 INFO L82 PathProgramCache]: Analyzing trace with hash -444378052, now seen corresponding path program 42 times [2021-05-02 23:46:31,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:46:31,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1923186704] [2021-05-02 23:46:31,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:46:31,596 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1075 1000000) InVars {main_~i~0=v_main_~i~0_1075} OutVars{main_~i~0=v_main_~i~0_1075} AuxVars[] AssignedVars[] [2021-05-02 23:46:31,603 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:46:31,605 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:31,612 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:46:31,634 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:46:31,650 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:46:31,652 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1077 999998) InVars {main_~i~0=v_main_~i~0_1077} OutVars{main_~i~0=v_main_~i~0_1077} AuxVars[] AssignedVars[] [2021-05-02 23:46:31,654 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:46:31,655 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:31,661 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:46:31,683 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:46:31,699 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:46:31,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:31,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:46:31,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:31,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:46:33,135 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:46:33,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1923186704] [2021-05-02 23:46:33,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1923186704] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:46:33,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:46:33,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2021-05-02 23:46:33,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556411103] [2021-05-02 23:46:33,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-02 23:46:33,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:46:33,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-02 23:46:33,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=2404, Unknown=0, NotChecked=0, Total=2550 [2021-05-02 23:46:33,137 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand has 50 states, 49 states have (on average 1.8571428571428572) internal successors, (91), 48 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:36,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:46:36,699 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2021-05-02 23:46:36,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-02 23:46:36,707 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.8571428571428572) internal successors, (91), 48 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2021-05-02 23:46:36,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:46:36,708 INFO L225 Difference]: With dead ends: 104 [2021-05-02 23:46:36,708 INFO L226 Difference]: Without dead ends: 99 [2021-05-02 23:46:36,709 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 35 SyntacticMatches, 11 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 3039.7ms TimeCoverageRelationStatistics Valid=362, Invalid=8380, Unknown=0, NotChecked=0, Total=8742 [2021-05-02 23:46:36,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-05-02 23:46:36,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2021-05-02 23:46:36,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 93 states have (on average 1.010752688172043) internal successors, (94), 93 states have internal predecessors, (94), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:36,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2021-05-02 23:46:36,727 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 95 [2021-05-02 23:46:36,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:46:36,728 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2021-05-02 23:46:36,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 49 states have (on average 1.8571428571428572) internal successors, (91), 48 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:36,728 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2021-05-02 23:46:36,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-02 23:46:36,728 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:46:36,728 INFO L523 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:46:36,729 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-05-02 23:46:36,729 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:46:36,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:46:36,729 INFO L82 PathProgramCache]: Analyzing trace with hash -743550310, now seen corresponding path program 43 times [2021-05-02 23:46:36,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:46:36,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1644177057] [2021-05-02 23:46:36,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:46:36,743 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1122 1000000) InVars {main_~i~0=v_main_~i~0_1122} OutVars{main_~i~0=v_main_~i~0_1122} AuxVars[] AssignedVars[] [2021-05-02 23:46:36,745 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:46:36,752 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:36,759 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:46:36,772 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:46:36,788 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:46:36,790 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1124 999998) InVars {main_~i~0=v_main_~i~0_1124} OutVars{main_~i~0=v_main_~i~0_1124} AuxVars[] AssignedVars[] [2021-05-02 23:46:36,792 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:46:36,793 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:36,800 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:46:36,823 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:46:36,839 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:46:36,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:36,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:46:36,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:36,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:46:38,235 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:46:38,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1644177057] [2021-05-02 23:46:38,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1644177057] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:46:38,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:46:38,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2021-05-02 23:46:38,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360118644] [2021-05-02 23:46:38,236 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-02 23:46:38,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:46:38,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-02 23:46:38,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2503, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 23:46:38,237 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand has 51 states, 50 states have (on average 1.86) internal successors, (93), 49 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:41,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:46:41,928 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2021-05-02 23:46:41,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-02 23:46:41,929 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 1.86) internal successors, (93), 49 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 97 [2021-05-02 23:46:41,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:46:41,930 INFO L225 Difference]: With dead ends: 106 [2021-05-02 23:46:41,930 INFO L226 Difference]: Without dead ends: 101 [2021-05-02 23:46:41,931 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 3066.5ms TimeCoverageRelationStatistics Valid=370, Invalid=8750, Unknown=0, NotChecked=0, Total=9120 [2021-05-02 23:46:41,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-05-02 23:46:41,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2021-05-02 23:46:41,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.0105263157894737) internal successors, (96), 95 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:41,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2021-05-02 23:46:41,946 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 97 [2021-05-02 23:46:41,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:46:41,946 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2021-05-02 23:46:41,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 51 states, 50 states have (on average 1.86) internal successors, (93), 49 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:41,947 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2021-05-02 23:46:41,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-05-02 23:46:41,947 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:46:41,947 INFO L523 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:46:41,947 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-05-02 23:46:41,947 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:46:41,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:46:41,948 INFO L82 PathProgramCache]: Analyzing trace with hash -485281416, now seen corresponding path program 44 times [2021-05-02 23:46:41,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:46:41,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [221627200] [2021-05-02 23:46:41,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:46:41,957 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1170 1000000) InVars {main_~i~0=v_main_~i~0_1170} OutVars{main_~i~0=v_main_~i~0_1170} AuxVars[] AssignedVars[] [2021-05-02 23:46:41,958 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:46:41,965 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:41,971 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:46:41,984 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:46:42,001 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:46:42,002 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1172 999998) InVars {main_~i~0=v_main_~i~0_1172} OutVars{main_~i~0=v_main_~i~0_1172} AuxVars[] AssignedVars[] [2021-05-02 23:46:42,004 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:46:42,011 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:42,017 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:46:42,031 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:46:42,049 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:46:42,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:42,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:46:42,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:42,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:46:43,595 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:46:43,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [221627200] [2021-05-02 23:46:43,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [221627200] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:46:43,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:46:43,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2021-05-02 23:46:43,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978387092] [2021-05-02 23:46:43,596 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-05-02 23:46:43,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:46:43,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-05-02 23:46:43,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=2604, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 23:46:43,597 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand has 52 states, 51 states have (on average 1.8627450980392157) internal successors, (95), 50 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:47,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:46:47,308 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2021-05-02 23:46:47,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-02 23:46:47,308 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 1.8627450980392157) internal successors, (95), 50 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2021-05-02 23:46:47,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:46:47,309 INFO L225 Difference]: With dead ends: 108 [2021-05-02 23:46:47,309 INFO L226 Difference]: Without dead ends: 103 [2021-05-02 23:46:47,309 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 38 SyntacticMatches, 10 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1105 ImplicationChecksByTransitivity, 3198.9ms TimeCoverageRelationStatistics Valid=378, Invalid=9128, Unknown=0, NotChecked=0, Total=9506 [2021-05-02 23:46:47,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-02 23:46:47,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2021-05-02 23:46:47,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 97 states have (on average 1.0103092783505154) internal successors, (98), 97 states have internal predecessors, (98), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:47,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2021-05-02 23:46:47,325 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 99 [2021-05-02 23:46:47,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:46:47,325 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2021-05-02 23:46:47,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 52 states, 51 states have (on average 1.8627450980392157) internal successors, (95), 50 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:47,325 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2021-05-02 23:46:47,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-05-02 23:46:47,326 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:46:47,326 INFO L523 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:46:47,326 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-05-02 23:46:47,326 INFO L428 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:46:47,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:46:47,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1396977450, now seen corresponding path program 45 times [2021-05-02 23:46:47,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:46:47,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [222594991] [2021-05-02 23:46:47,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:46:47,335 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1219 1000000) InVars {main_~i~0=v_main_~i~0_1219} OutVars{main_~i~0=v_main_~i~0_1219} AuxVars[] AssignedVars[] [2021-05-02 23:46:47,337 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:46:47,337 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:47,342 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:46:47,361 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:46:47,373 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:46:47,375 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1221 999998) InVars {main_~i~0=v_main_~i~0_1221} OutVars{main_~i~0=v_main_~i~0_1221} AuxVars[] AssignedVars[] [2021-05-02 23:46:47,375 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:46:47,381 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:47,385 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:46:47,398 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:46:47,412 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:46:47,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:47,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:46:47,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:47,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:46:48,978 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:46:48,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [222594991] [2021-05-02 23:46:48,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [222594991] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:46:48,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:46:48,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2021-05-02 23:46:48,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132214902] [2021-05-02 23:46:48,979 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-05-02 23:46:48,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:46:48,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-05-02 23:46:48,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=2707, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 23:46:48,980 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand has 53 states, 52 states have (on average 1.8653846153846154) internal successors, (97), 51 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:52,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:46:52,620 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2021-05-02 23:46:52,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-02 23:46:52,621 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.8653846153846154) internal successors, (97), 51 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2021-05-02 23:46:52,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:46:52,621 INFO L225 Difference]: With dead ends: 110 [2021-05-02 23:46:52,621 INFO L226 Difference]: Without dead ends: 105 [2021-05-02 23:46:52,622 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 42 SyntacticMatches, 7 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1146 ImplicationChecksByTransitivity, 3170.3ms TimeCoverageRelationStatistics Valid=386, Invalid=9514, Unknown=0, NotChecked=0, Total=9900 [2021-05-02 23:46:52,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-05-02 23:46:52,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2021-05-02 23:46:52,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 99 states have (on average 1.0101010101010102) internal successors, (100), 99 states have internal predecessors, (100), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:52,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2021-05-02 23:46:52,638 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 101 [2021-05-02 23:46:52,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:46:52,638 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2021-05-02 23:46:52,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 53 states, 52 states have (on average 1.8653846153846154) internal successors, (97), 51 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:52,639 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2021-05-02 23:46:52,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-05-02 23:46:52,639 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:46:52,639 INFO L523 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:46:52,639 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-05-02 23:46:52,639 INFO L428 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:46:52,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:46:52,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1363537740, now seen corresponding path program 46 times [2021-05-02 23:46:52,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:46:52,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1967206475] [2021-05-02 23:46:52,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:46:52,644 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1269 1000000) InVars {main_~i~0=v_main_~i~0_1269} OutVars{main_~i~0=v_main_~i~0_1269} AuxVars[] AssignedVars[] [2021-05-02 23:46:52,645 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:46:52,651 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:52,656 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:46:52,666 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:46:52,679 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:46:52,680 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1271 999998) InVars {main_~i~0=v_main_~i~0_1271} OutVars{main_~i~0=v_main_~i~0_1271} AuxVars[] AssignedVars[] [2021-05-02 23:46:52,683 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:46:52,684 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:52,688 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:46:52,704 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:46:52,718 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:46:52,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:52,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:46:52,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:52,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:46:54,096 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:46:54,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1967206475] [2021-05-02 23:46:54,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1967206475] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:46:54,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:46:54,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2021-05-02 23:46:54,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732527547] [2021-05-02 23:46:54,097 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-05-02 23:46:54,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:46:54,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-05-02 23:46:54,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=2812, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 23:46:54,098 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand has 54 states, 53 states have (on average 1.8679245283018868) internal successors, (99), 52 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:57,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:46:57,662 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2021-05-02 23:46:57,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-02 23:46:57,663 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 1.8679245283018868) internal successors, (99), 52 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 103 [2021-05-02 23:46:57,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:46:57,664 INFO L225 Difference]: With dead ends: 112 [2021-05-02 23:46:57,664 INFO L226 Difference]: Without dead ends: 107 [2021-05-02 23:46:57,664 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 41 SyntacticMatches, 9 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1198 ImplicationChecksByTransitivity, 2988.9ms TimeCoverageRelationStatistics Valid=394, Invalid=9908, Unknown=0, NotChecked=0, Total=10302 [2021-05-02 23:46:57,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-05-02 23:46:57,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2021-05-02 23:46:57,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 101 states have (on average 1.00990099009901) internal successors, (102), 101 states have internal predecessors, (102), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:57,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2021-05-02 23:46:57,684 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 103 [2021-05-02 23:46:57,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:46:57,684 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2021-05-02 23:46:57,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 54 states, 53 states have (on average 1.8679245283018868) internal successors, (99), 52 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:57,684 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2021-05-02 23:46:57,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-02 23:46:57,684 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:46:57,684 INFO L523 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:46:57,684 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-05-02 23:46:57,685 INFO L428 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:46:57,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:46:57,685 INFO L82 PathProgramCache]: Analyzing trace with hash 707252498, now seen corresponding path program 47 times [2021-05-02 23:46:57,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:46:57,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [949919869] [2021-05-02 23:46:57,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:46:57,688 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1320 1000000) InVars {main_~i~0=v_main_~i~0_1320} OutVars{main_~i~0=v_main_~i~0_1320} AuxVars[] AssignedVars[] [2021-05-02 23:46:57,689 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:46:57,694 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:57,699 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:46:57,710 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:46:57,722 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:46:57,724 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1322 999998) InVars {main_~i~0=v_main_~i~0_1322} OutVars{main_~i~0=v_main_~i~0_1322} AuxVars[] AssignedVars[] [2021-05-02 23:46:57,725 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:46:57,730 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:57,734 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:46:57,744 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:46:57,757 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:46:57,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:57,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:46:57,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:57,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:46:59,273 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:46:59,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [949919869] [2021-05-02 23:46:59,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [949919869] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:46:59,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:46:59,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2021-05-02 23:46:59,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913563903] [2021-05-02 23:46:59,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-05-02 23:46:59,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:46:59,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-05-02 23:46:59,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2919, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 23:46:59,275 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand has 55 states, 54 states have (on average 1.8703703703703705) internal successors, (101), 53 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:02,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:47:02,989 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2021-05-02 23:47:02,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-02 23:47:02,990 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 1.8703703703703705) internal successors, (101), 53 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 105 [2021-05-02 23:47:02,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:47:02,990 INFO L225 Difference]: With dead ends: 114 [2021-05-02 23:47:02,990 INFO L226 Difference]: Without dead ends: 109 [2021-05-02 23:47:02,991 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 39 SyntacticMatches, 12 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 3214.8ms TimeCoverageRelationStatistics Valid=402, Invalid=10310, Unknown=0, NotChecked=0, Total=10712 [2021-05-02 23:47:02,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-02 23:47:03,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2021-05-02 23:47:03,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 103 states have (on average 1.0097087378640777) internal successors, (104), 103 states have internal predecessors, (104), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:03,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2021-05-02 23:47:03,007 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 105 [2021-05-02 23:47:03,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:47:03,007 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2021-05-02 23:47:03,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 55 states, 54 states have (on average 1.8703703703703705) internal successors, (101), 53 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:03,007 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2021-05-02 23:47:03,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-05-02 23:47:03,008 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:47:03,008 INFO L523 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:47:03,008 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-05-02 23:47:03,008 INFO L428 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:47:03,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:47:03,008 INFO L82 PathProgramCache]: Analyzing trace with hash -2128154128, now seen corresponding path program 48 times [2021-05-02 23:47:03,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:47:03,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [616603687] [2021-05-02 23:47:03,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:47:03,012 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1372 1000000) InVars {main_~i~0=v_main_~i~0_1372} OutVars{main_~i~0=v_main_~i~0_1372} AuxVars[] AssignedVars[] [2021-05-02 23:47:03,013 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:47:03,014 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:03,018 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:47:03,033 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:47:03,047 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:47:03,048 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1374 999998) InVars {main_~i~0=v_main_~i~0_1374} OutVars{main_~i~0=v_main_~i~0_1374} AuxVars[] AssignedVars[] [2021-05-02 23:47:03,049 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:47:03,050 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:03,055 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:47:03,071 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:47:03,085 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:47:03,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:03,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:47:03,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:03,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:47:04,608 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:47:04,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [616603687] [2021-05-02 23:47:04,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [616603687] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:47:04,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:47:04,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2021-05-02 23:47:04,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348472268] [2021-05-02 23:47:04,608 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-05-02 23:47:04,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:47:04,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-05-02 23:47:04,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=3028, Unknown=0, NotChecked=0, Total=3192 [2021-05-02 23:47:04,609 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand has 56 states, 55 states have (on average 1.8727272727272728) internal successors, (103), 54 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:08,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:47:08,547 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2021-05-02 23:47:08,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-02 23:47:08,547 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.8727272727272728) internal successors, (103), 54 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 107 [2021-05-02 23:47:08,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:47:08,548 INFO L225 Difference]: With dead ends: 116 [2021-05-02 23:47:08,548 INFO L226 Difference]: Without dead ends: 111 [2021-05-02 23:47:08,549 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 42 SyntacticMatches, 10 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1299 ImplicationChecksByTransitivity, 3294.7ms TimeCoverageRelationStatistics Valid=410, Invalid=10720, Unknown=0, NotChecked=0, Total=11130 [2021-05-02 23:47:08,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-02 23:47:08,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2021-05-02 23:47:08,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 105 states have (on average 1.0095238095238095) internal successors, (106), 105 states have internal predecessors, (106), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:08,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2021-05-02 23:47:08,571 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 107 [2021-05-02 23:47:08,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:47:08,572 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2021-05-02 23:47:08,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 56 states, 55 states have (on average 1.8727272727272728) internal successors, (103), 54 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:08,572 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2021-05-02 23:47:08,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-05-02 23:47:08,572 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:47:08,572 INFO L523 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:47:08,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-05-02 23:47:08,572 INFO L428 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:47:08,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:47:08,573 INFO L82 PathProgramCache]: Analyzing trace with hash 350311246, now seen corresponding path program 49 times [2021-05-02 23:47:08,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:47:08,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [282110174] [2021-05-02 23:47:08,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:47:08,577 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1425 1000000) InVars {main_~i~0=v_main_~i~0_1425} OutVars{main_~i~0=v_main_~i~0_1425} AuxVars[] AssignedVars[] [2021-05-02 23:47:08,580 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:47:08,585 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:08,591 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:47:08,601 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:47:08,615 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:47:08,616 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1427 999998) InVars {main_~i~0=v_main_~i~0_1427} OutVars{main_~i~0=v_main_~i~0_1427} AuxVars[] AssignedVars[] [2021-05-02 23:47:08,617 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:47:08,618 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:08,623 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:47:08,639 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:47:08,653 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:47:08,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:08,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:47:08,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:08,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:47:10,318 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:47:10,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [282110174] [2021-05-02 23:47:10,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [282110174] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:47:10,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:47:10,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2021-05-02 23:47:10,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758684215] [2021-05-02 23:47:10,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-05-02 23:47:10,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:47:10,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-05-02 23:47:10,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=3139, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 23:47:10,319 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand has 57 states, 56 states have (on average 1.875) internal successors, (105), 55 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:14,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:47:14,425 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2021-05-02 23:47:14,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-02 23:47:14,425 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 1.875) internal successors, (105), 55 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 109 [2021-05-02 23:47:14,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:47:14,426 INFO L225 Difference]: With dead ends: 118 [2021-05-02 23:47:14,426 INFO L226 Difference]: Without dead ends: 113 [2021-05-02 23:47:14,427 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 42 SyntacticMatches, 11 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1352 ImplicationChecksByTransitivity, 3524.8ms TimeCoverageRelationStatistics Valid=418, Invalid=11138, Unknown=0, NotChecked=0, Total=11556 [2021-05-02 23:47:14,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-05-02 23:47:14,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2021-05-02 23:47:14,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 107 states have (on average 1.0093457943925233) internal successors, (108), 107 states have internal predecessors, (108), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:14,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2021-05-02 23:47:14,445 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 109 [2021-05-02 23:47:14,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:47:14,445 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2021-05-02 23:47:14,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 57 states, 56 states have (on average 1.875) internal successors, (105), 55 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:14,445 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2021-05-02 23:47:14,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-05-02 23:47:14,446 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:47:14,446 INFO L523 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:47:14,446 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-05-02 23:47:14,446 INFO L428 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:47:14,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:47:14,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1551313620, now seen corresponding path program 50 times [2021-05-02 23:47:14,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:47:14,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [486193405] [2021-05-02 23:47:14,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:47:14,450 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1479 1000000) InVars {main_~i~0=v_main_~i~0_1479} OutVars{main_~i~0=v_main_~i~0_1479} AuxVars[] AssignedVars[] [2021-05-02 23:47:14,452 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:47:14,457 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:14,463 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:47:14,473 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:47:14,488 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:47:14,489 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1481 999998) InVars {main_~i~0=v_main_~i~0_1481} OutVars{main_~i~0=v_main_~i~0_1481} AuxVars[] AssignedVars[] [2021-05-02 23:47:14,491 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:47:14,497 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:14,503 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:47:14,514 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:47:14,529 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:47:14,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:14,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:47:14,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:14,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:47:16,307 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:47:16,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [486193405] [2021-05-02 23:47:16,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [486193405] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:47:16,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:47:16,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2021-05-02 23:47:16,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773439242] [2021-05-02 23:47:16,308 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-05-02 23:47:16,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:47:16,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-05-02 23:47:16,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=3252, Unknown=0, NotChecked=0, Total=3422 [2021-05-02 23:47:16,309 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand has 58 states, 57 states have (on average 1.8771929824561404) internal successors, (107), 56 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:20,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:47:20,621 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2021-05-02 23:47:20,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-02 23:47:20,621 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 1.8771929824561404) internal successors, (107), 56 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 111 [2021-05-02 23:47:20,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:47:20,622 INFO L225 Difference]: With dead ends: 120 [2021-05-02 23:47:20,622 INFO L226 Difference]: Without dead ends: 115 [2021-05-02 23:47:20,623 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 40 SyntacticMatches, 14 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1410 ImplicationChecksByTransitivity, 3724.5ms TimeCoverageRelationStatistics Valid=426, Invalid=11564, Unknown=0, NotChecked=0, Total=11990 [2021-05-02 23:47:20,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-05-02 23:47:20,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2021-05-02 23:47:20,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 109 states have (on average 1.0091743119266054) internal successors, (110), 109 states have internal predecessors, (110), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:20,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2021-05-02 23:47:20,642 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 111 [2021-05-02 23:47:20,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:47:20,642 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2021-05-02 23:47:20,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 58 states, 57 states have (on average 1.8771929824561404) internal successors, (107), 56 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:20,642 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2021-05-02 23:47:20,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-05-02 23:47:20,643 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:47:20,643 INFO L523 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:47:20,643 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-05-02 23:47:20,643 INFO L428 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:47:20,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:47:20,643 INFO L82 PathProgramCache]: Analyzing trace with hash 643258250, now seen corresponding path program 51 times [2021-05-02 23:47:20,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:47:20,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1992651792] [2021-05-02 23:47:20,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:47:20,648 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1534 1000000) InVars {main_~i~0=v_main_~i~0_1534} OutVars{main_~i~0=v_main_~i~0_1534} AuxVars[] AssignedVars[] [2021-05-02 23:47:20,650 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:47:20,651 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:20,657 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:47:20,683 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:47:20,700 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:47:20,702 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1536 999998) InVars {main_~i~0=v_main_~i~0_1536} OutVars{main_~i~0=v_main_~i~0_1536} AuxVars[] AssignedVars[] [2021-05-02 23:47:20,704 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:47:20,705 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:20,711 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:47:20,733 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:47:20,749 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:47:20,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:20,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:47:20,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:20,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:47:22,623 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:47:22,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1992651792] [2021-05-02 23:47:22,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1992651792] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:47:22,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:47:22,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2021-05-02 23:47:22,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285597776] [2021-05-02 23:47:22,624 INFO L460 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-05-02 23:47:22,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:47:22,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-05-02 23:47:22,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=3367, Unknown=0, NotChecked=0, Total=3540 [2021-05-02 23:47:22,625 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand has 59 states, 58 states have (on average 1.8793103448275863) internal successors, (109), 57 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:27,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:47:27,088 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2021-05-02 23:47:27,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-02 23:47:27,089 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 1.8793103448275863) internal successors, (109), 57 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 113 [2021-05-02 23:47:27,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:47:27,089 INFO L225 Difference]: With dead ends: 122 [2021-05-02 23:47:27,089 INFO L226 Difference]: Without dead ends: 117 [2021-05-02 23:47:27,090 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 42 SyntacticMatches, 13 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1461 ImplicationChecksByTransitivity, 3893.0ms TimeCoverageRelationStatistics Valid=434, Invalid=11998, Unknown=0, NotChecked=0, Total=12432 [2021-05-02 23:47:27,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-05-02 23:47:27,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2021-05-02 23:47:27,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 111 states have (on average 1.009009009009009) internal successors, (112), 111 states have internal predecessors, (112), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:27,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2021-05-02 23:47:27,109 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 113 [2021-05-02 23:47:27,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:47:27,110 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2021-05-02 23:47:27,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 59 states, 58 states have (on average 1.8793103448275863) internal successors, (109), 57 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:27,110 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2021-05-02 23:47:27,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-05-02 23:47:27,110 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:47:27,110 INFO L523 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:47:27,110 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-05-02 23:47:27,111 INFO L428 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:47:27,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:47:27,111 INFO L82 PathProgramCache]: Analyzing trace with hash 797882984, now seen corresponding path program 52 times [2021-05-02 23:47:27,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:47:27,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1851951416] [2021-05-02 23:47:27,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:47:27,116 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1590 1000000) InVars {main_~i~0=v_main_~i~0_1590} OutVars{main_~i~0=v_main_~i~0_1590} AuxVars[] AssignedVars[] [2021-05-02 23:47:27,117 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:47:27,123 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:27,128 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:47:27,140 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:47:27,155 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:47:27,157 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1592 999998) InVars {main_~i~0=v_main_~i~0_1592} OutVars{main_~i~0=v_main_~i~0_1592} AuxVars[] AssignedVars[] [2021-05-02 23:47:27,159 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:47:27,165 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:27,172 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:47:27,182 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:47:27,196 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:47:27,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:27,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:47:27,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:27,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:47:29,045 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:47:29,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1851951416] [2021-05-02 23:47:29,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1851951416] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:47:29,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:47:29,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2021-05-02 23:47:29,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578429230] [2021-05-02 23:47:29,046 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-05-02 23:47:29,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:47:29,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-05-02 23:47:29,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=3484, Unknown=0, NotChecked=0, Total=3660 [2021-05-02 23:47:29,046 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand has 60 states, 59 states have (on average 1.88135593220339) internal successors, (111), 58 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:33,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:47:33,683 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2021-05-02 23:47:33,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-02 23:47:33,684 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 1.88135593220339) internal successors, (111), 58 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 115 [2021-05-02 23:47:33,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:47:33,685 INFO L225 Difference]: With dead ends: 124 [2021-05-02 23:47:33,685 INFO L226 Difference]: Without dead ends: 119 [2021-05-02 23:47:33,686 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 42 SyntacticMatches, 14 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1517 ImplicationChecksByTransitivity, 3930.2ms TimeCoverageRelationStatistics Valid=442, Invalid=12440, Unknown=0, NotChecked=0, Total=12882 [2021-05-02 23:47:33,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-02 23:47:33,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2021-05-02 23:47:33,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 113 states have (on average 1.008849557522124) internal successors, (114), 113 states have internal predecessors, (114), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:33,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2021-05-02 23:47:33,705 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 115 [2021-05-02 23:47:33,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:47:33,705 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2021-05-02 23:47:33,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 60 states, 59 states have (on average 1.88135593220339) internal successors, (111), 58 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:33,705 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2021-05-02 23:47:33,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-05-02 23:47:33,706 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:47:33,706 INFO L523 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:47:33,706 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-05-02 23:47:33,706 INFO L428 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:47:33,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:47:33,706 INFO L82 PathProgramCache]: Analyzing trace with hash -931603002, now seen corresponding path program 53 times [2021-05-02 23:47:33,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:47:33,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1186346703] [2021-05-02 23:47:33,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:47:33,710 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1647 1000000) InVars {main_~i~0=v_main_~i~0_1647} OutVars{main_~i~0=v_main_~i~0_1647} AuxVars[] AssignedVars[] [2021-05-02 23:47:33,712 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:47:33,713 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:33,718 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:47:33,739 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:47:33,769 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:47:33,771 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1649 999998) InVars {main_~i~0=v_main_~i~0_1649} OutVars{main_~i~0=v_main_~i~0_1649} AuxVars[] AssignedVars[] [2021-05-02 23:47:33,772 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:47:33,779 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:33,785 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:47:33,798 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:47:33,814 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:47:33,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:33,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:47:33,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:33,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:47:36,024 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:47:36,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1186346703] [2021-05-02 23:47:36,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1186346703] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:47:36,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:47:36,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2021-05-02 23:47:36,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451692450] [2021-05-02 23:47:36,024 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-05-02 23:47:36,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:47:36,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-05-02 23:47:36,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=3603, Unknown=0, NotChecked=0, Total=3782 [2021-05-02 23:47:36,025 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand has 61 states, 60 states have (on average 1.8833333333333333) internal successors, (113), 59 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:40,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:47:40,904 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2021-05-02 23:47:40,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-02 23:47:40,904 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 1.8833333333333333) internal successors, (113), 59 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 117 [2021-05-02 23:47:40,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:47:40,905 INFO L225 Difference]: With dead ends: 126 [2021-05-02 23:47:40,905 INFO L226 Difference]: Without dead ends: 121 [2021-05-02 23:47:40,906 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 39 SyntacticMatches, 18 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1580 ImplicationChecksByTransitivity, 4383.7ms TimeCoverageRelationStatistics Valid=450, Invalid=12890, Unknown=0, NotChecked=0, Total=13340 [2021-05-02 23:47:40,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-05-02 23:47:40,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2021-05-02 23:47:40,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 115 states have (on average 1.008695652173913) internal successors, (116), 115 states have internal predecessors, (116), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:40,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2021-05-02 23:47:40,928 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 117 [2021-05-02 23:47:40,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:47:40,929 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2021-05-02 23:47:40,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 61 states, 60 states have (on average 1.8833333333333333) internal successors, (113), 59 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:40,929 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2021-05-02 23:47:40,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-05-02 23:47:40,929 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:47:40,929 INFO L523 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:47:40,929 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-05-02 23:47:40,929 INFO L428 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:47:40,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:47:40,930 INFO L82 PathProgramCache]: Analyzing trace with hash -815291996, now seen corresponding path program 54 times [2021-05-02 23:47:40,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:47:40,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [573119807] [2021-05-02 23:47:40,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:47:40,948 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1705 1000000) InVars {main_~i~0=v_main_~i~0_1705} OutVars{main_~i~0=v_main_~i~0_1705} AuxVars[] AssignedVars[] [2021-05-02 23:47:40,950 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:47:40,956 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:40,965 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:47:40,977 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:47:40,993 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:47:40,994 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1707 999998) InVars {main_~i~0=v_main_~i~0_1707} OutVars{main_~i~0=v_main_~i~0_1707} AuxVars[] AssignedVars[] [2021-05-02 23:47:40,995 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:47:41,002 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:41,008 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:47:41,019 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:47:41,035 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:47:41,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:41,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:47:41,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:41,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:47:42,975 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:47:42,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [573119807] [2021-05-02 23:47:42,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [573119807] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:47:42,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:47:42,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2021-05-02 23:47:42,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15291715] [2021-05-02 23:47:42,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-05-02 23:47:42,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:47:42,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-05-02 23:47:42,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=3724, Unknown=0, NotChecked=0, Total=3906 [2021-05-02 23:47:42,977 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand has 62 states, 61 states have (on average 1.8852459016393444) internal successors, (115), 60 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:47,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:47:47,945 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2021-05-02 23:47:47,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-02 23:47:47,945 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 1.8852459016393444) internal successors, (115), 60 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 119 [2021-05-02 23:47:47,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:47:47,946 INFO L225 Difference]: With dead ends: 128 [2021-05-02 23:47:47,946 INFO L226 Difference]: Without dead ends: 123 [2021-05-02 23:47:47,947 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 46 SyntacticMatches, 12 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 4221.8ms TimeCoverageRelationStatistics Valid=458, Invalid=13348, Unknown=0, NotChecked=0, Total=13806 [2021-05-02 23:47:47,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-05-02 23:47:47,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2021-05-02 23:47:47,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 117 states have (on average 1.0085470085470085) internal successors, (118), 117 states have internal predecessors, (118), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:47,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2021-05-02 23:47:47,968 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 119 [2021-05-02 23:47:47,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:47:47,968 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2021-05-02 23:47:47,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 62 states, 61 states have (on average 1.8852459016393444) internal successors, (115), 60 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:47,968 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2021-05-02 23:47:47,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-05-02 23:47:47,968 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:47:47,969 INFO L523 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:47:47,969 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-05-02 23:47:47,969 INFO L428 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:47:47,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:47:47,969 INFO L82 PathProgramCache]: Analyzing trace with hash -709564926, now seen corresponding path program 55 times [2021-05-02 23:47:47,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:47:47,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821318356] [2021-05-02 23:47:47,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:47:47,973 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1764 1000000) InVars {main_~i~0=v_main_~i~0_1764} OutVars{main_~i~0=v_main_~i~0_1764} AuxVars[] AssignedVars[] [2021-05-02 23:47:47,978 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:47:47,983 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:47,992 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:47:48,016 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:47:48,035 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:47:48,037 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1766 999998) InVars {main_~i~0=v_main_~i~0_1766} OutVars{main_~i~0=v_main_~i~0_1766} AuxVars[] AssignedVars[] [2021-05-02 23:47:48,039 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:47:48,046 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:48,052 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:47:48,068 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:47:48,084 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:47:48,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:48,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:47:48,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:48,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:47:50,089 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:47:50,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821318356] [2021-05-02 23:47:50,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [821318356] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:47:50,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:47:50,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2021-05-02 23:47:50,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195577677] [2021-05-02 23:47:50,090 INFO L460 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-05-02 23:47:50,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:47:50,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-05-02 23:47:50,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=3847, Unknown=0, NotChecked=0, Total=4032 [2021-05-02 23:47:50,091 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand has 63 states, 62 states have (on average 1.8870967741935485) internal successors, (117), 61 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:55,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:47:55,170 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2021-05-02 23:47:55,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-02 23:47:55,171 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 1.8870967741935485) internal successors, (117), 61 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 121 [2021-05-02 23:47:55,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:47:55,172 INFO L225 Difference]: With dead ends: 130 [2021-05-02 23:47:55,172 INFO L226 Difference]: Without dead ends: 125 [2021-05-02 23:47:55,172 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 47 SyntacticMatches, 12 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1681 ImplicationChecksByTransitivity, 4264.9ms TimeCoverageRelationStatistics Valid=466, Invalid=13814, Unknown=0, NotChecked=0, Total=14280 [2021-05-02 23:47:55,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-05-02 23:47:55,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2021-05-02 23:47:55,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 119 states have (on average 1.0084033613445378) internal successors, (120), 119 states have internal predecessors, (120), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:55,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2021-05-02 23:47:55,193 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 121 [2021-05-02 23:47:55,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:47:55,193 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2021-05-02 23:47:55,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 63 states, 62 states have (on average 1.8870967741935485) internal successors, (117), 61 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:55,193 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2021-05-02 23:47:55,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-05-02 23:47:55,194 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:47:55,194 INFO L523 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:47:55,194 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-05-02 23:47:55,194 INFO L428 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:47:55,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:47:55,194 INFO L82 PathProgramCache]: Analyzing trace with hash 2109901536, now seen corresponding path program 56 times [2021-05-02 23:47:55,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:47:55,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1037039622] [2021-05-02 23:47:55,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:47:55,199 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1824 1000000) InVars {main_~i~0=v_main_~i~0_1824} OutVars{main_~i~0=v_main_~i~0_1824} AuxVars[] AssignedVars[] [2021-05-02 23:47:55,200 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:47:55,207 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:55,212 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:47:55,224 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:47:55,239 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:47:55,241 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1826 999998) InVars {main_~i~0=v_main_~i~0_1826} OutVars{main_~i~0=v_main_~i~0_1826} AuxVars[] AssignedVars[] [2021-05-02 23:47:55,245 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:47:55,254 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:55,263 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:47:55,274 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:47:55,290 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:47:55,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:55,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:47:55,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:55,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:47:57,367 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:47:57,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1037039622] [2021-05-02 23:47:57,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1037039622] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:47:57,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:47:57,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2021-05-02 23:47:57,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805299409] [2021-05-02 23:47:57,369 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2021-05-02 23:47:57,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:47:57,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-05-02 23:47:57,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=3972, Unknown=0, NotChecked=0, Total=4160 [2021-05-02 23:47:57,369 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand has 64 states, 63 states have (on average 1.8888888888888888) internal successors, (119), 62 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:48:02,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:48:02,690 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2021-05-02 23:48:02,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-02 23:48:02,691 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 1.8888888888888888) internal successors, (119), 62 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 123 [2021-05-02 23:48:02,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:48:02,691 INFO L225 Difference]: With dead ends: 132 [2021-05-02 23:48:02,691 INFO L226 Difference]: Without dead ends: 127 [2021-05-02 23:48:02,692 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 48 SyntacticMatches, 12 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1739 ImplicationChecksByTransitivity, 4468.9ms TimeCoverageRelationStatistics Valid=474, Invalid=14288, Unknown=0, NotChecked=0, Total=14762 [2021-05-02 23:48:02,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-05-02 23:48:02,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2021-05-02 23:48:02,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 121 states have (on average 1.0082644628099173) internal successors, (122), 121 states have internal predecessors, (122), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:48:02,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2021-05-02 23:48:02,714 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 123 [2021-05-02 23:48:02,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:48:02,714 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2021-05-02 23:48:02,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 64 states, 63 states have (on average 1.8888888888888888) internal successors, (119), 62 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:48:02,714 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2021-05-02 23:48:02,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-05-02 23:48:02,715 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:48:02,715 INFO L523 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:48:02,715 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-05-02 23:48:02,715 INFO L428 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:48:02,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:48:02,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1492807742, now seen corresponding path program 57 times [2021-05-02 23:48:02,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:48:02,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [484540889] [2021-05-02 23:48:02,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:48:02,720 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1885 1000000) InVars {main_~i~0=v_main_~i~0_1885} OutVars{main_~i~0=v_main_~i~0_1885} AuxVars[] AssignedVars[] [2021-05-02 23:48:02,722 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:48:02,728 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:02,734 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:48:02,745 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:48:02,760 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:48:02,761 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1887 999998) InVars {main_~i~0=v_main_~i~0_1887} OutVars{main_~i~0=v_main_~i~0_1887} AuxVars[] AssignedVars[] [2021-05-02 23:48:02,763 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:48:02,764 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:02,769 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:48:02,787 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:48:02,802 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:48:02,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:48:02,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:48:02,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:48:02,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:48:05,066 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:48:05,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [484540889] [2021-05-02 23:48:05,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [484540889] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:48:05,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:48:05,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2021-05-02 23:48:05,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009778498] [2021-05-02 23:48:05,067 INFO L460 AbstractCegarLoop]: Interpolant automaton has 65 states [2021-05-02 23:48:05,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:48:05,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-05-02 23:48:05,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=4099, Unknown=0, NotChecked=0, Total=4290 [2021-05-02 23:48:05,067 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand has 65 states, 64 states have (on average 1.890625) internal successors, (121), 63 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:48:10,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:48:10,573 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2021-05-02 23:48:10,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-02 23:48:10,573 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 1.890625) internal successors, (121), 63 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 125 [2021-05-02 23:48:10,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:48:10,574 INFO L225 Difference]: With dead ends: 134 [2021-05-02 23:48:10,574 INFO L226 Difference]: Without dead ends: 129 [2021-05-02 23:48:10,575 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 44 SyntacticMatches, 17 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1808 ImplicationChecksByTransitivity, 4733.9ms TimeCoverageRelationStatistics Valid=482, Invalid=14770, Unknown=0, NotChecked=0, Total=15252 [2021-05-02 23:48:10,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-02 23:48:10,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2021-05-02 23:48:10,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 123 states have (on average 1.008130081300813) internal successors, (124), 123 states have internal predecessors, (124), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:48:10,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2021-05-02 23:48:10,597 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 125 [2021-05-02 23:48:10,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:48:10,597 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2021-05-02 23:48:10,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 65 states, 64 states have (on average 1.890625) internal successors, (121), 63 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:48:10,597 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2021-05-02 23:48:10,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-05-02 23:48:10,598 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:48:10,598 INFO L523 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:48:10,598 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-05-02 23:48:10,598 INFO L428 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:48:10,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:48:10,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1171158556, now seen corresponding path program 58 times [2021-05-02 23:48:10,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:48:10,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1940326541] [2021-05-02 23:48:10,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:48:10,606 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1947 1000000) InVars {main_~i~0=v_main_~i~0_1947} OutVars{main_~i~0=v_main_~i~0_1947} AuxVars[] AssignedVars[] [2021-05-02 23:48:10,607 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:48:10,614 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:10,619 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:48:10,631 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:48:10,646 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:48:10,648 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1949 999998) InVars {main_~i~0=v_main_~i~0_1949} OutVars{main_~i~0=v_main_~i~0_1949} AuxVars[] AssignedVars[] [2021-05-02 23:48:10,650 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:48:10,656 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:10,662 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:48:10,673 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:48:10,687 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:48:10,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:48:10,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:48:10,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:48:10,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:48:12,821 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:48:12,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1940326541] [2021-05-02 23:48:12,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1940326541] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:48:12,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:48:12,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2021-05-02 23:48:12,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804621685] [2021-05-02 23:48:12,822 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-05-02 23:48:12,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:48:12,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-05-02 23:48:12,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=4228, Unknown=0, NotChecked=0, Total=4422 [2021-05-02 23:48:12,823 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand has 66 states, 65 states have (on average 1.8923076923076922) internal successors, (123), 64 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:48:18,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:48:18,631 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2021-05-02 23:48:18,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-02 23:48:18,631 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 1.8923076923076922) internal successors, (123), 64 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 127 [2021-05-02 23:48:18,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:48:18,632 INFO L225 Difference]: With dead ends: 136 [2021-05-02 23:48:18,632 INFO L226 Difference]: Without dead ends: 131 [2021-05-02 23:48:18,633 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 49 SyntacticMatches, 13 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1860 ImplicationChecksByTransitivity, 4732.4ms TimeCoverageRelationStatistics Valid=490, Invalid=15260, Unknown=0, NotChecked=0, Total=15750 [2021-05-02 23:48:18,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-02 23:48:18,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2021-05-02 23:48:18,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.008) internal successors, (126), 125 states have internal predecessors, (126), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:48:18,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2021-05-02 23:48:18,658 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 127 [2021-05-02 23:48:18,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:48:18,658 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2021-05-02 23:48:18,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 66 states, 65 states have (on average 1.8923076923076922) internal successors, (123), 64 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:48:18,658 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2021-05-02 23:48:18,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-05-02 23:48:18,659 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:48:18,659 INFO L523 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:48:18,659 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-05-02 23:48:18,659 INFO L428 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:48:18,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:48:18,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1303936122, now seen corresponding path program 59 times [2021-05-02 23:48:18,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:48:18,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1971142850] [2021-05-02 23:48:18,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:48:18,666 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2010 1000000) InVars {main_~i~0=v_main_~i~0_2010} OutVars{main_~i~0=v_main_~i~0_2010} AuxVars[] AssignedVars[] [2021-05-02 23:48:18,668 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:48:18,676 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:18,683 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:48:18,698 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:48:18,715 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:48:18,717 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2012 999998) InVars {main_~i~0=v_main_~i~0_2012} OutVars{main_~i~0=v_main_~i~0_2012} AuxVars[] AssignedVars[] [2021-05-02 23:48:18,718 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:48:18,727 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:18,735 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:48:18,749 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:48:18,767 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:48:18,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:48:18,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:48:18,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:48:18,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:48:21,216 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:48:21,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1971142850] [2021-05-02 23:48:21,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1971142850] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:48:21,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:48:21,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2021-05-02 23:48:21,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727039104] [2021-05-02 23:48:21,217 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states [2021-05-02 23:48:21,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:48:21,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-05-02 23:48:21,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=4359, Unknown=0, NotChecked=0, Total=4556 [2021-05-02 23:48:21,218 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand has 67 states, 66 states have (on average 1.893939393939394) internal successors, (125), 65 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:48:27,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:48:27,343 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2021-05-02 23:48:27,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-02 23:48:27,343 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 1.893939393939394) internal successors, (125), 65 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 129 [2021-05-02 23:48:27,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:48:27,344 INFO L225 Difference]: With dead ends: 138 [2021-05-02 23:48:27,344 INFO L226 Difference]: Without dead ends: 133 [2021-05-02 23:48:27,345 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 48 SyntacticMatches, 15 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1925 ImplicationChecksByTransitivity, 5184.5ms TimeCoverageRelationStatistics Valid=498, Invalid=15758, Unknown=0, NotChecked=0, Total=16256 [2021-05-02 23:48:27,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-05-02 23:48:27,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2021-05-02 23:48:27,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 127 states have (on average 1.0078740157480315) internal successors, (128), 127 states have internal predecessors, (128), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:48:27,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2021-05-02 23:48:27,370 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 129 [2021-05-02 23:48:27,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:48:27,370 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2021-05-02 23:48:27,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 67 states, 66 states have (on average 1.893939393939394) internal successors, (125), 65 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:48:27,370 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2021-05-02 23:48:27,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-05-02 23:48:27,370 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:48:27,371 INFO L523 BasicCegarLoop]: trace histogram [60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:48:27,371 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-05-02 23:48:27,371 INFO L428 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:48:27,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:48:27,371 INFO L82 PathProgramCache]: Analyzing trace with hash 54158168, now seen corresponding path program 60 times [2021-05-02 23:48:27,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:48:27,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1886164435] [2021-05-02 23:48:27,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:48:27,385 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2074 1000000) InVars {main_~i~0=v_main_~i~0_2074} OutVars{main_~i~0=v_main_~i~0_2074} AuxVars[] AssignedVars[] [2021-05-02 23:48:27,388 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:48:27,396 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:27,403 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:48:27,416 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:48:27,435 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:48:27,437 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2076 999998) InVars {main_~i~0=v_main_~i~0_2076} OutVars{main_~i~0=v_main_~i~0_2076} AuxVars[] AssignedVars[] [2021-05-02 23:48:27,439 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:48:27,447 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:27,460 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:48:27,474 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:48:27,491 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:48:27,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:48:27,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:48:27,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:48:27,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:48:30,205 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:48:30,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1886164435] [2021-05-02 23:48:30,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1886164435] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:48:30,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:48:30,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2021-05-02 23:48:30,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970184955] [2021-05-02 23:48:30,206 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2021-05-02 23:48:30,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:48:30,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-05-02 23:48:30,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=4492, Unknown=0, NotChecked=0, Total=4692 [2021-05-02 23:48:30,206 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand has 68 states, 67 states have (on average 1.8955223880597014) internal successors, (127), 66 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:48:36,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:48:36,423 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2021-05-02 23:48:36,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-02 23:48:36,424 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 1.8955223880597014) internal successors, (127), 66 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 131 [2021-05-02 23:48:36,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:48:36,424 INFO L225 Difference]: With dead ends: 140 [2021-05-02 23:48:36,424 INFO L226 Difference]: Without dead ends: 135 [2021-05-02 23:48:36,426 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 46 SyntacticMatches, 18 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1993 ImplicationChecksByTransitivity, 5507.8ms TimeCoverageRelationStatistics Valid=506, Invalid=16264, Unknown=0, NotChecked=0, Total=16770 [2021-05-02 23:48:36,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-05-02 23:48:36,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2021-05-02 23:48:36,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 129 states have (on average 1.0077519379844961) internal successors, (130), 129 states have internal predecessors, (130), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:48:36,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2021-05-02 23:48:36,451 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 131 [2021-05-02 23:48:36,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:48:36,451 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2021-05-02 23:48:36,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 68 states, 67 states have (on average 1.8955223880597014) internal successors, (127), 66 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:48:36,451 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2021-05-02 23:48:36,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-05-02 23:48:36,452 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:48:36,452 INFO L523 BasicCegarLoop]: trace histogram [61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:48:36,452 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-05-02 23:48:36,452 INFO L428 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:48:36,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:48:36,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1608387254, now seen corresponding path program 61 times [2021-05-02 23:48:36,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:48:36,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1661254331] [2021-05-02 23:48:36,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:48:36,461 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2139 1000000) InVars {main_~i~0=v_main_~i~0_2139} OutVars{main_~i~0=v_main_~i~0_2139} AuxVars[] AssignedVars[] [2021-05-02 23:48:36,463 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:48:36,464 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:36,470 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:48:36,488 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:48:36,503 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:48:36,504 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2141 999998) InVars {main_~i~0=v_main_~i~0_2141} OutVars{main_~i~0=v_main_~i~0_2141} AuxVars[] AssignedVars[] [2021-05-02 23:48:36,505 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:48:36,511 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:36,517 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:48:36,530 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:48:36,546 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:48:36,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:48:36,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:48:36,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:48:36,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:48:39,211 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:48:39,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1661254331] [2021-05-02 23:48:39,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1661254331] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:48:39,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:48:39,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2021-05-02 23:48:39,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508909794] [2021-05-02 23:48:39,212 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-05-02 23:48:39,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:48:39,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-05-02 23:48:39,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=4627, Unknown=0, NotChecked=0, Total=4830 [2021-05-02 23:48:39,213 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand has 69 states, 68 states have (on average 1.8970588235294117) internal successors, (129), 67 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:48:45,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:48:45,553 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2021-05-02 23:48:45,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-02 23:48:45,553 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 1.8970588235294117) internal successors, (129), 67 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 133 [2021-05-02 23:48:45,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:48:45,554 INFO L225 Difference]: With dead ends: 142 [2021-05-02 23:48:45,554 INFO L226 Difference]: Without dead ends: 137 [2021-05-02 23:48:45,555 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 47 SyntacticMatches, 18 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2056 ImplicationChecksByTransitivity, 5501.2ms TimeCoverageRelationStatistics Valid=514, Invalid=16778, Unknown=0, NotChecked=0, Total=17292 [2021-05-02 23:48:45,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-05-02 23:48:45,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2021-05-02 23:48:45,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 131 states have (on average 1.0076335877862594) internal successors, (132), 131 states have internal predecessors, (132), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:48:45,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2021-05-02 23:48:45,580 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 133 [2021-05-02 23:48:45,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:48:45,580 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2021-05-02 23:48:45,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 69 states, 68 states have (on average 1.8970588235294117) internal successors, (129), 67 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:48:45,580 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2021-05-02 23:48:45,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-05-02 23:48:45,580 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:48:45,581 INFO L523 BasicCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:48:45,581 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-05-02 23:48:45,581 INFO L428 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:48:45,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:48:45,581 INFO L82 PathProgramCache]: Analyzing trace with hash 573919892, now seen corresponding path program 62 times [2021-05-02 23:48:45,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:48:45,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2133368140] [2021-05-02 23:48:45,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:48:45,591 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2205 1000000) InVars {main_~i~0=v_main_~i~0_2205} OutVars{main_~i~0=v_main_~i~0_2205} AuxVars[] AssignedVars[] [2021-05-02 23:48:45,593 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:48:45,594 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:45,599 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:48:45,635 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:48:45,653 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:48:45,654 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2207 999998) InVars {main_~i~0=v_main_~i~0_2207} OutVars{main_~i~0=v_main_~i~0_2207} AuxVars[] AssignedVars[] [2021-05-02 23:48:45,655 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:48:45,662 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:45,668 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:48:45,679 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:48:45,696 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:48:45,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:48:45,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:48:45,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:48:45,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:48:48,421 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:48:48,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2133368140] [2021-05-02 23:48:48,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2133368140] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:48:48,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:48:48,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2021-05-02 23:48:48,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30099347] [2021-05-02 23:48:48,422 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-05-02 23:48:48,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:48:48,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-05-02 23:48:48,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=4764, Unknown=0, NotChecked=0, Total=4970 [2021-05-02 23:48:48,423 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand has 70 states, 69 states have (on average 1.8985507246376812) internal successors, (131), 68 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:48:55,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:48:55,187 INFO L93 Difference]: Finished difference Result 144 states and 144 transitions. [2021-05-02 23:48:55,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-02 23:48:55,188 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 1.8985507246376812) internal successors, (131), 68 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 135 [2021-05-02 23:48:55,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:48:55,189 INFO L225 Difference]: With dead ends: 144 [2021-05-02 23:48:55,189 INFO L226 Difference]: Without dead ends: 139 [2021-05-02 23:48:55,189 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 46 SyntacticMatches, 20 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2124 ImplicationChecksByTransitivity, 5728.1ms TimeCoverageRelationStatistics Valid=522, Invalid=17300, Unknown=0, NotChecked=0, Total=17822 [2021-05-02 23:48:55,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-05-02 23:48:55,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2021-05-02 23:48:55,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 133 states have (on average 1.0075187969924813) internal successors, (134), 133 states have internal predecessors, (134), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:48:55,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2021-05-02 23:48:55,215 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 135 [2021-05-02 23:48:55,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:48:55,215 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2021-05-02 23:48:55,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 70 states, 69 states have (on average 1.8985507246376812) internal successors, (131), 68 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:48:55,216 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2021-05-02 23:48:55,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-05-02 23:48:55,216 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:48:55,216 INFO L523 BasicCegarLoop]: trace histogram [63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:48:55,216 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-05-02 23:48:55,216 INFO L428 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:48:55,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:48:55,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1411769614, now seen corresponding path program 63 times [2021-05-02 23:48:55,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:48:55,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [914411076] [2021-05-02 23:48:55,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:48:55,222 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2272 1000000) InVars {main_~i~0=v_main_~i~0_2272} OutVars{main_~i~0=v_main_~i~0_2272} AuxVars[] AssignedVars[] [2021-05-02 23:48:55,224 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:48:55,231 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:55,237 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:48:55,250 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:48:55,266 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:48:55,267 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2274 999998) InVars {main_~i~0=v_main_~i~0_2274} OutVars{main_~i~0=v_main_~i~0_2274} AuxVars[] AssignedVars[] [2021-05-02 23:48:55,268 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:48:55,269 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:55,274 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:48:55,293 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:48:55,308 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:48:55,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:48:55,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:48:55,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:48:55,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:48:57,884 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:48:57,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [914411076] [2021-05-02 23:48:57,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [914411076] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:48:57,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:48:57,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2021-05-02 23:48:57,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010414995] [2021-05-02 23:48:57,885 INFO L460 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-05-02 23:48:57,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:48:57,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-05-02 23:48:57,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=4903, Unknown=0, NotChecked=0, Total=5112 [2021-05-02 23:48:57,886 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand has 71 states, 70 states have (on average 1.9) internal successors, (133), 69 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:04,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:49:04,935 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2021-05-02 23:49:04,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-02 23:49:04,936 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 1.9) internal successors, (133), 69 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 137 [2021-05-02 23:49:04,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:49:04,936 INFO L225 Difference]: With dead ends: 146 [2021-05-02 23:49:04,936 INFO L226 Difference]: Without dead ends: 141 [2021-05-02 23:49:04,937 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 57 SyntacticMatches, 10 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2169 ImplicationChecksByTransitivity, 5716.1ms TimeCoverageRelationStatistics Valid=530, Invalid=17830, Unknown=0, NotChecked=0, Total=18360 [2021-05-02 23:49:04,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-05-02 23:49:04,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2021-05-02 23:49:04,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 135 states have (on average 1.0074074074074073) internal successors, (136), 135 states have internal predecessors, (136), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:04,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2021-05-02 23:49:04,964 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 137 [2021-05-02 23:49:04,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:49:04,964 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2021-05-02 23:49:04,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 71 states, 70 states have (on average 1.9) internal successors, (133), 69 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:04,965 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2021-05-02 23:49:04,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-05-02 23:49:04,965 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:49:04,965 INFO L523 BasicCegarLoop]: trace histogram [64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:49:04,965 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-05-02 23:49:04,965 INFO L428 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:49:04,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:49:04,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1601061840, now seen corresponding path program 64 times [2021-05-02 23:49:04,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:49:04,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1155155306] [2021-05-02 23:49:04,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:49:04,974 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2340 1000000) InVars {main_~i~0=v_main_~i~0_2340} OutVars{main_~i~0=v_main_~i~0_2340} AuxVars[] AssignedVars[] [2021-05-02 23:49:04,975 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:49:04,982 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:04,988 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:49:05,000 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:49:05,016 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:49:05,018 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2342 999998) InVars {main_~i~0=v_main_~i~0_2342} OutVars{main_~i~0=v_main_~i~0_2342} AuxVars[] AssignedVars[] [2021-05-02 23:49:05,019 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:49:05,020 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:05,025 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:49:05,042 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:49:05,057 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:49:05,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:05,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:49:05,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:05,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:49:07,874 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:49:07,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1155155306] [2021-05-02 23:49:07,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1155155306] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:49:07,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:49:07,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2021-05-02 23:49:07,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449309020] [2021-05-02 23:49:07,875 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-05-02 23:49:07,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:49:07,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-05-02 23:49:07,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=5044, Unknown=0, NotChecked=0, Total=5256 [2021-05-02 23:49:07,876 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand has 72 states, 71 states have (on average 1.9014084507042253) internal successors, (135), 70 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:15,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:49:15,523 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2021-05-02 23:49:15,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-02 23:49:15,524 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 1.9014084507042253) internal successors, (135), 70 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 139 [2021-05-02 23:49:15,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:49:15,525 INFO L225 Difference]: With dead ends: 148 [2021-05-02 23:49:15,525 INFO L226 Difference]: Without dead ends: 143 [2021-05-02 23:49:15,526 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 53 SyntacticMatches, 15 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2245 ImplicationChecksByTransitivity, 6215.1ms TimeCoverageRelationStatistics Valid=538, Invalid=18368, Unknown=0, NotChecked=0, Total=18906 [2021-05-02 23:49:15,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-05-02 23:49:15,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2021-05-02 23:49:15,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 137 states have (on average 1.0072992700729928) internal successors, (138), 137 states have internal predecessors, (138), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:15,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2021-05-02 23:49:15,556 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 139 [2021-05-02 23:49:15,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:49:15,556 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2021-05-02 23:49:15,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 72 states, 71 states have (on average 1.9014084507042253) internal successors, (135), 70 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:15,556 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2021-05-02 23:49:15,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-05-02 23:49:15,557 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:49:15,557 INFO L523 BasicCegarLoop]: trace histogram [65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:49:15,557 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-05-02 23:49:15,557 INFO L428 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:49:15,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:49:15,558 INFO L82 PathProgramCache]: Analyzing trace with hash 2124131630, now seen corresponding path program 65 times [2021-05-02 23:49:15,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:49:15,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [16462206] [2021-05-02 23:49:15,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:49:15,566 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2409 1000000) InVars {main_~i~0=v_main_~i~0_2409} OutVars{main_~i~0=v_main_~i~0_2409} AuxVars[] AssignedVars[] [2021-05-02 23:49:15,569 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:49:15,577 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:15,583 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:49:15,602 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:49:15,622 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:49:15,624 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2411 999998) InVars {main_~i~0=v_main_~i~0_2411} OutVars{main_~i~0=v_main_~i~0_2411} AuxVars[] AssignedVars[] [2021-05-02 23:49:15,627 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:49:15,628 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:15,635 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:49:15,666 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:49:15,691 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:49:15,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:15,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:49:15,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:15,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:49:18,986 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:49:18,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [16462206] [2021-05-02 23:49:18,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [16462206] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:49:18,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:49:18,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2021-05-02 23:49:18,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138225827] [2021-05-02 23:49:18,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states [2021-05-02 23:49:18,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:49:18,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-05-02 23:49:18,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=5187, Unknown=0, NotChecked=0, Total=5402 [2021-05-02 23:49:18,988 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand has 73 states, 72 states have (on average 1.9027777777777777) internal successors, (137), 71 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:27,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:49:27,498 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2021-05-02 23:49:27,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-02 23:49:27,499 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 1.9027777777777777) internal successors, (137), 71 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 141 [2021-05-02 23:49:27,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:49:27,500 INFO L225 Difference]: With dead ends: 150 [2021-05-02 23:49:27,500 INFO L226 Difference]: Without dead ends: 145 [2021-05-02 23:49:27,502 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 50 SyntacticMatches, 19 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2320 ImplicationChecksByTransitivity, 7056.8ms TimeCoverageRelationStatistics Valid=546, Invalid=18914, Unknown=0, NotChecked=0, Total=19460 [2021-05-02 23:49:27,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-05-02 23:49:27,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2021-05-02 23:49:27,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 139 states have (on average 1.0071942446043165) internal successors, (140), 139 states have internal predecessors, (140), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:27,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 144 transitions. [2021-05-02 23:49:27,532 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 144 transitions. Word has length 141 [2021-05-02 23:49:27,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:49:27,533 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 144 transitions. [2021-05-02 23:49:27,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 73 states, 72 states have (on average 1.9027777777777777) internal successors, (137), 71 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:27,533 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 144 transitions. [2021-05-02 23:49:27,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-05-02 23:49:27,533 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:49:27,533 INFO L523 BasicCegarLoop]: trace histogram [66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:49:27,533 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-05-02 23:49:27,534 INFO L428 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:49:27,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:49:27,534 INFO L82 PathProgramCache]: Analyzing trace with hash -2011941108, now seen corresponding path program 66 times [2021-05-02 23:49:27,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:49:27,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [676049857] [2021-05-02 23:49:27,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:49:27,542 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2479 1000000) InVars {main_~i~0=v_main_~i~0_2479} OutVars{main_~i~0=v_main_~i~0_2479} AuxVars[] AssignedVars[] [2021-05-02 23:49:27,544 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:49:27,552 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:27,559 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:49:27,573 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:49:27,591 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:49:27,593 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2481 999998) InVars {main_~i~0=v_main_~i~0_2481} OutVars{main_~i~0=v_main_~i~0_2481} AuxVars[] AssignedVars[] [2021-05-02 23:49:27,596 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:49:27,598 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:27,605 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:49:27,626 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:49:27,643 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:49:27,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:27,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:49:27,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:27,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:49:30,897 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:49:30,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [676049857] [2021-05-02 23:49:30,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [676049857] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:49:30,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:49:30,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2021-05-02 23:49:30,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538172349] [2021-05-02 23:49:30,898 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2021-05-02 23:49:30,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:49:30,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-05-02 23:49:30,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=5332, Unknown=0, NotChecked=0, Total=5550 [2021-05-02 23:49:30,899 INFO L87 Difference]: Start difference. First operand 144 states and 144 transitions. Second operand has 74 states, 73 states have (on average 1.904109589041096) internal successors, (139), 72 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:39,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:49:39,705 INFO L93 Difference]: Finished difference Result 152 states and 152 transitions. [2021-05-02 23:49:39,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-05-02 23:49:39,708 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 73 states have (on average 1.904109589041096) internal successors, (139), 72 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2021-05-02 23:49:39,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:49:39,709 INFO L225 Difference]: With dead ends: 152 [2021-05-02 23:49:39,709 INFO L226 Difference]: Without dead ends: 147 [2021-05-02 23:49:39,710 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 55 SyntacticMatches, 15 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2380 ImplicationChecksByTransitivity, 7127.6ms TimeCoverageRelationStatistics Valid=554, Invalid=19468, Unknown=0, NotChecked=0, Total=20022 [2021-05-02 23:49:39,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-05-02 23:49:39,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2021-05-02 23:49:39,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 141 states have (on average 1.0070921985815602) internal successors, (142), 141 states have internal predecessors, (142), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:39,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2021-05-02 23:49:39,742 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 143 [2021-05-02 23:49:39,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:49:39,743 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2021-05-02 23:49:39,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 74 states, 73 states have (on average 1.904109589041096) internal successors, (139), 72 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:39,743 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2021-05-02 23:49:39,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-05-02 23:49:39,744 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:49:39,744 INFO L523 BasicCegarLoop]: trace histogram [67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:49:39,744 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-05-02 23:49:39,744 INFO L428 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:49:39,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:49:39,744 INFO L82 PathProgramCache]: Analyzing trace with hash 361873770, now seen corresponding path program 67 times [2021-05-02 23:49:39,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:49:39,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [401172206] [2021-05-02 23:49:39,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:49:39,751 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2550 1000000) InVars {main_~i~0=v_main_~i~0_2550} OutVars{main_~i~0=v_main_~i~0_2550} AuxVars[] AssignedVars[] [2021-05-02 23:49:39,753 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:49:39,755 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:39,764 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:49:39,792 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:49:39,814 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:49:39,816 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2552 999998) InVars {main_~i~0=v_main_~i~0_2552} OutVars{main_~i~0=v_main_~i~0_2552} AuxVars[] AssignedVars[] [2021-05-02 23:49:39,822 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:49:39,833 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:39,842 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:49:39,861 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:49:39,887 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:49:39,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:39,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:49:39,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:39,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:49:43,670 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:49:43,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [401172206] [2021-05-02 23:49:43,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [401172206] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:49:43,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:49:43,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2021-05-02 23:49:43,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54124547] [2021-05-02 23:49:43,671 INFO L460 AbstractCegarLoop]: Interpolant automaton has 75 states [2021-05-02 23:49:43,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:49:43,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-05-02 23:49:43,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=5479, Unknown=0, NotChecked=0, Total=5700 [2021-05-02 23:49:43,672 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand has 75 states, 74 states have (on average 1.9054054054054055) internal successors, (141), 73 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:52,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:49:52,929 INFO L93 Difference]: Finished difference Result 154 states and 154 transitions. [2021-05-02 23:49:52,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-05-02 23:49:52,930 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 74 states have (on average 1.9054054054054055) internal successors, (141), 73 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 145 [2021-05-02 23:49:52,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:49:52,931 INFO L225 Difference]: With dead ends: 154 [2021-05-02 23:49:52,931 INFO L226 Difference]: Without dead ends: 149 [2021-05-02 23:49:52,932 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 53 SyntacticMatches, 18 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2455 ImplicationChecksByTransitivity, 7818.0ms TimeCoverageRelationStatistics Valid=562, Invalid=20030, Unknown=0, NotChecked=0, Total=20592 [2021-05-02 23:49:52,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-02 23:49:52,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2021-05-02 23:49:52,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 143 states have (on average 1.006993006993007) internal successors, (144), 143 states have internal predecessors, (144), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:52,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2021-05-02 23:49:52,965 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 145 [2021-05-02 23:49:52,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:49:52,965 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2021-05-02 23:49:52,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 75 states, 74 states have (on average 1.9054054054054055) internal successors, (141), 73 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:52,965 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2021-05-02 23:49:52,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-05-02 23:49:52,965 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:49:52,966 INFO L523 BasicCegarLoop]: trace histogram [68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:49:52,966 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-05-02 23:49:52,966 INFO L428 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:49:52,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:49:52,966 INFO L82 PathProgramCache]: Analyzing trace with hash 970337352, now seen corresponding path program 68 times [2021-05-02 23:49:52,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:49:52,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1047742536] [2021-05-02 23:49:52,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:49:52,972 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2622 1000000) InVars {main_~i~0=v_main_~i~0_2622} OutVars{main_~i~0=v_main_~i~0_2622} AuxVars[] AssignedVars[] [2021-05-02 23:49:52,975 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:49:52,984 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:52,992 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:49:53,008 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:49:53,027 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:49:53,030 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2624 999998) InVars {main_~i~0=v_main_~i~0_2624} OutVars{main_~i~0=v_main_~i~0_2624} AuxVars[] AssignedVars[] [2021-05-02 23:49:53,031 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:49:53,032 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:53,040 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:49:53,062 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:49:53,081 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:49:53,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:53,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:49:53,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:53,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:49:56,609 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:49:56,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1047742536] [2021-05-02 23:49:56,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1047742536] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:49:56,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:49:56,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2021-05-02 23:49:56,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457994771] [2021-05-02 23:49:56,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2021-05-02 23:49:56,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:49:56,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-05-02 23:49:56,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=5628, Unknown=0, NotChecked=0, Total=5852 [2021-05-02 23:49:56,611 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand has 76 states, 75 states have (on average 1.9066666666666667) internal successors, (143), 74 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:50:06,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:50:06,009 INFO L93 Difference]: Finished difference Result 156 states and 156 transitions. [2021-05-02 23:50:06,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-05-02 23:50:06,011 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 75 states have (on average 1.9066666666666667) internal successors, (143), 74 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 147 [2021-05-02 23:50:06,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:50:06,012 INFO L225 Difference]: With dead ends: 156 [2021-05-02 23:50:06,012 INFO L226 Difference]: Without dead ends: 151 [2021-05-02 23:50:06,013 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 62 SyntacticMatches, 10 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2509 ImplicationChecksByTransitivity, 7644.5ms TimeCoverageRelationStatistics Valid=570, Invalid=20600, Unknown=0, NotChecked=0, Total=21170 [2021-05-02 23:50:06,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-05-02 23:50:06,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2021-05-02 23:50:06,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 145 states have (on average 1.006896551724138) internal successors, (146), 145 states have internal predecessors, (146), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:50:06,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 150 transitions. [2021-05-02 23:50:06,047 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 150 transitions. Word has length 147 [2021-05-02 23:50:06,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:50:06,047 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 150 transitions. [2021-05-02 23:50:06,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 76 states, 75 states have (on average 1.9066666666666667) internal successors, (143), 74 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:50:06,048 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 150 transitions. [2021-05-02 23:50:06,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-05-02 23:50:06,048 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:50:06,048 INFO L523 BasicCegarLoop]: trace histogram [69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:50:06,049 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-05-02 23:50:06,049 INFO L428 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:50:06,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:50:06,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1588287398, now seen corresponding path program 69 times [2021-05-02 23:50:06,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:50:06,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [371383268] [2021-05-02 23:50:06,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:50:06,056 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2695 1000000) InVars {main_~i~0=v_main_~i~0_2695} OutVars{main_~i~0=v_main_~i~0_2695} AuxVars[] AssignedVars[] [2021-05-02 23:50:06,059 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:50:06,069 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:06,077 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:50:06,097 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:50:06,119 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:50:06,121 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2697 999998) InVars {main_~i~0=v_main_~i~0_2697} OutVars{main_~i~0=v_main_~i~0_2697} AuxVars[] AssignedVars[] [2021-05-02 23:50:06,123 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:50:06,124 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:06,131 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:50:06,155 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:50:06,174 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:50:06,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:50:06,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:50:06,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:50:06,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:50:09,507 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:50:09,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [371383268] [2021-05-02 23:50:09,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [371383268] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:50:09,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:50:09,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2021-05-02 23:50:09,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98517315] [2021-05-02 23:50:09,508 INFO L460 AbstractCegarLoop]: Interpolant automaton has 77 states [2021-05-02 23:50:09,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:50:09,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-05-02 23:50:09,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=5779, Unknown=0, NotChecked=0, Total=6006 [2021-05-02 23:50:09,509 INFO L87 Difference]: Start difference. First operand 150 states and 150 transitions. Second operand has 77 states, 76 states have (on average 1.9078947368421053) internal successors, (145), 75 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:50:18,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:50:18,951 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2021-05-02 23:50:18,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-05-02 23:50:18,952 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 1.9078947368421053) internal successors, (145), 75 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 149 [2021-05-02 23:50:18,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:50:18,953 INFO L225 Difference]: With dead ends: 158 [2021-05-02 23:50:18,953 INFO L226 Difference]: Without dead ends: 153 [2021-05-02 23:50:18,955 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 65 SyntacticMatches, 8 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2576 ImplicationChecksByTransitivity, 7461.5ms TimeCoverageRelationStatistics Valid=578, Invalid=21178, Unknown=0, NotChecked=0, Total=21756 [2021-05-02 23:50:18,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-05-02 23:50:18,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2021-05-02 23:50:18,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 147 states have (on average 1.0068027210884354) internal successors, (148), 147 states have internal predecessors, (148), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:50:18,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2021-05-02 23:50:18,988 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 149 [2021-05-02 23:50:18,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:50:18,988 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2021-05-02 23:50:18,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 77 states, 76 states have (on average 1.9078947368421053) internal successors, (145), 75 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:50:18,989 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2021-05-02 23:50:18,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-05-02 23:50:18,989 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:50:18,989 INFO L523 BasicCegarLoop]: trace histogram [70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:50:18,989 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-05-02 23:50:18,990 INFO L428 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:50:18,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:50:18,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1562172540, now seen corresponding path program 70 times [2021-05-02 23:50:18,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:50:18,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1602561378] [2021-05-02 23:50:18,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:50:18,998 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2769 1000000) InVars {main_~i~0=v_main_~i~0_2769} OutVars{main_~i~0=v_main_~i~0_2769} AuxVars[] AssignedVars[] [2021-05-02 23:50:18,999 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:50:19,008 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:19,014 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:50:19,028 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:50:19,049 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:50:19,067 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2771 999998) InVars {main_~i~0=v_main_~i~0_2771} OutVars{main_~i~0=v_main_~i~0_2771} AuxVars[] AssignedVars[] [2021-05-02 23:50:19,069 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:50:19,070 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:19,079 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:50:19,107 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:50:19,126 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:50:19,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:50:19,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:50:19,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:50:19,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:50:22,816 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:50:22,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1602561378] [2021-05-02 23:50:22,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1602561378] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:50:22,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:50:22,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2021-05-02 23:50:22,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430068758] [2021-05-02 23:50:22,817 INFO L460 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-05-02 23:50:22,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:50:22,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-05-02 23:50:22,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=5932, Unknown=0, NotChecked=0, Total=6162 [2021-05-02 23:50:22,818 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand has 78 states, 77 states have (on average 1.9090909090909092) internal successors, (147), 76 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:50:32,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:50:32,550 INFO L93 Difference]: Finished difference Result 160 states and 160 transitions. [2021-05-02 23:50:32,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-05-02 23:50:32,551 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 77 states have (on average 1.9090909090909092) internal successors, (147), 76 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 151 [2021-05-02 23:50:32,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:50:32,552 INFO L225 Difference]: With dead ends: 160 [2021-05-02 23:50:32,552 INFO L226 Difference]: Without dead ends: 155 [2021-05-02 23:50:32,553 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 57 SyntacticMatches, 17 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2666 ImplicationChecksByTransitivity, 7963.9ms TimeCoverageRelationStatistics Valid=586, Invalid=21764, Unknown=0, NotChecked=0, Total=22350 [2021-05-02 23:50:32,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-05-02 23:50:32,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2021-05-02 23:50:32,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 149 states have (on average 1.0067114093959733) internal successors, (150), 149 states have internal predecessors, (150), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:50:32,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 154 transitions. [2021-05-02 23:50:32,588 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 154 transitions. Word has length 151 [2021-05-02 23:50:32,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:50:32,588 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 154 transitions. [2021-05-02 23:50:32,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 78 states, 77 states have (on average 1.9090909090909092) internal successors, (147), 76 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:50:32,588 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 154 transitions. [2021-05-02 23:50:32,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-05-02 23:50:32,589 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:50:32,589 INFO L523 BasicCegarLoop]: trace histogram [71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:50:32,589 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-05-02 23:50:32,589 INFO L428 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:50:32,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:50:32,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1202229278, now seen corresponding path program 71 times [2021-05-02 23:50:32,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:50:32,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1231492258] [2021-05-02 23:50:32,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:50:32,598 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2844 1000000) InVars {main_~i~0=v_main_~i~0_2844} OutVars{main_~i~0=v_main_~i~0_2844} AuxVars[] AssignedVars[] [2021-05-02 23:50:32,601 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:50:32,610 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:32,617 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:50:32,637 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:50:32,657 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:50:32,659 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2846 999998) InVars {main_~i~0=v_main_~i~0_2846} OutVars{main_~i~0=v_main_~i~0_2846} AuxVars[] AssignedVars[] [2021-05-02 23:50:32,660 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:50:32,670 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:32,677 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:50:32,693 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:50:32,712 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:50:32,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:50:32,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:50:32,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:50:32,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:50:36,546 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:50:36,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1231492258] [2021-05-02 23:50:36,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1231492258] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:50:36,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:50:36,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2021-05-02 23:50:36,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885107051] [2021-05-02 23:50:36,547 INFO L460 AbstractCegarLoop]: Interpolant automaton has 79 states [2021-05-02 23:50:36,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:50:36,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-05-02 23:50:36,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=6087, Unknown=0, NotChecked=0, Total=6320 [2021-05-02 23:50:36,547 INFO L87 Difference]: Start difference. First operand 154 states and 154 transitions. Second operand has 79 states, 78 states have (on average 1.9102564102564104) internal successors, (149), 77 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:50:48,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:50:48,762 INFO L93 Difference]: Finished difference Result 162 states and 162 transitions. [2021-05-02 23:50:48,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-02 23:50:48,763 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 78 states have (on average 1.9102564102564104) internal successors, (149), 77 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 153 [2021-05-02 23:50:48,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:50:48,764 INFO L225 Difference]: With dead ends: 162 [2021-05-02 23:50:48,764 INFO L226 Difference]: Without dead ends: 157 [2021-05-02 23:50:48,766 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 62 SyntacticMatches, 13 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2731 ImplicationChecksByTransitivity, 9182.3ms TimeCoverageRelationStatistics Valid=594, Invalid=22358, Unknown=0, NotChecked=0, Total=22952 [2021-05-02 23:50:48,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-05-02 23:50:48,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2021-05-02 23:50:48,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 151 states have (on average 1.0066225165562914) internal successors, (152), 151 states have internal predecessors, (152), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:50:48,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 156 transitions. [2021-05-02 23:50:48,803 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 156 transitions. Word has length 153 [2021-05-02 23:50:48,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:50:48,803 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 156 transitions. [2021-05-02 23:50:48,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 79 states, 78 states have (on average 1.9102564102564104) internal successors, (149), 77 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:50:48,804 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 156 transitions. [2021-05-02 23:50:48,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-05-02 23:50:48,805 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:50:48,805 INFO L523 BasicCegarLoop]: trace histogram [72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:50:48,805 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2021-05-02 23:50:48,805 INFO L428 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:50:48,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:50:48,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1105861824, now seen corresponding path program 72 times [2021-05-02 23:50:48,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:50:48,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792387115] [2021-05-02 23:50:48,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:50:48,817 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2920 1000000) InVars {main_~i~0=v_main_~i~0_2920} OutVars{main_~i~0=v_main_~i~0_2920} AuxVars[] AssignedVars[] [2021-05-02 23:50:48,826 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:50:48,829 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:48,841 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:50:48,884 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:50:48,912 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:50:48,916 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2922 999998) InVars {main_~i~0=v_main_~i~0_2922} OutVars{main_~i~0=v_main_~i~0_2922} AuxVars[] AssignedVars[] [2021-05-02 23:50:48,918 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:50:48,930 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:48,939 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:50:48,960 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:50:48,988 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:50:48,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:50:49,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:50:49,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:50:49,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:50:54,185 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:50:54,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792387115] [2021-05-02 23:50:54,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1792387115] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:50:54,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:50:54,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2021-05-02 23:50:54,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919186618] [2021-05-02 23:50:54,186 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2021-05-02 23:50:54,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:50:54,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-05-02 23:50:54,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=6244, Unknown=0, NotChecked=0, Total=6480 [2021-05-02 23:50:54,187 INFO L87 Difference]: Start difference. First operand 156 states and 156 transitions. Second operand has 80 states, 79 states have (on average 1.9113924050632911) internal successors, (151), 78 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:51:07,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:51:07,196 INFO L93 Difference]: Finished difference Result 164 states and 164 transitions. [2021-05-02 23:51:07,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-05-02 23:51:07,197 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 79 states have (on average 1.9113924050632911) internal successors, (151), 78 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 155 [2021-05-02 23:51:07,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:51:07,198 INFO L225 Difference]: With dead ends: 164 [2021-05-02 23:51:07,198 INFO L226 Difference]: Without dead ends: 159 [2021-05-02 23:51:07,200 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 56 SyntacticMatches, 20 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2819 ImplicationChecksByTransitivity, 10842.7ms TimeCoverageRelationStatistics Valid=602, Invalid=22960, Unknown=0, NotChecked=0, Total=23562 [2021-05-02 23:51:07,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-05-02 23:51:07,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2021-05-02 23:51:07,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 153 states have (on average 1.0065359477124183) internal successors, (154), 153 states have internal predecessors, (154), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:51:07,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2021-05-02 23:51:07,246 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 155 [2021-05-02 23:51:07,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:51:07,246 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2021-05-02 23:51:07,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 80 states, 79 states have (on average 1.9113924050632911) internal successors, (151), 78 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:51:07,246 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2021-05-02 23:51:07,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-05-02 23:51:07,247 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:51:07,247 INFO L523 BasicCegarLoop]: trace histogram [73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:51:07,247 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-05-02 23:51:07,247 INFO L428 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:51:07,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:51:07,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1316681186, now seen corresponding path program 73 times [2021-05-02 23:51:07,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:51:07,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1284528294] [2021-05-02 23:51:07,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:51:07,256 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2997 1000000) InVars {main_~i~0=v_main_~i~0_2997} OutVars{main_~i~0=v_main_~i~0_2997} AuxVars[] AssignedVars[] [2021-05-02 23:51:07,259 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:51:07,261 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:07,272 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:51:07,306 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:51:07,331 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:51:07,334 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2999 999998) InVars {main_~i~0=v_main_~i~0_2999} OutVars{main_~i~0=v_main_~i~0_2999} AuxVars[] AssignedVars[] [2021-05-02 23:51:07,336 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:51:07,350 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:07,359 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:51:07,379 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:51:07,403 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:51:07,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:51:07,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:51:07,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:51:07,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:51:12,428 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:51:12,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1284528294] [2021-05-02 23:51:12,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1284528294] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:51:12,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:51:12,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2021-05-02 23:51:12,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200307141] [2021-05-02 23:51:12,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 81 states [2021-05-02 23:51:12,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:51:12,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-05-02 23:51:12,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=6403, Unknown=0, NotChecked=0, Total=6642 [2021-05-02 23:51:12,431 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand has 81 states, 80 states have (on average 1.9125) internal successors, (153), 79 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:51:25,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:51:25,642 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2021-05-02 23:51:25,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-05-02 23:51:25,643 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 80 states have (on average 1.9125) internal successors, (153), 79 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 157 [2021-05-02 23:51:25,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:51:25,644 INFO L225 Difference]: With dead ends: 166 [2021-05-02 23:51:25,644 INFO L226 Difference]: Without dead ends: 161 [2021-05-02 23:51:25,645 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 57 SyntacticMatches, 20 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2894 ImplicationChecksByTransitivity, 10755.2ms TimeCoverageRelationStatistics Valid=610, Invalid=23570, Unknown=0, NotChecked=0, Total=24180 [2021-05-02 23:51:25,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-05-02 23:51:25,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2021-05-02 23:51:25,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 155 states have (on average 1.0064516129032257) internal successors, (156), 155 states have internal predecessors, (156), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:51:25,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2021-05-02 23:51:25,680 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 157 [2021-05-02 23:51:25,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:51:25,680 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2021-05-02 23:51:25,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 81 states, 80 states have (on average 1.9125) internal successors, (153), 79 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:51:25,681 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2021-05-02 23:51:25,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-05-02 23:51:25,681 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:51:25,681 INFO L523 BasicCegarLoop]: trace histogram [74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:51:25,681 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-05-02 23:51:25,681 INFO L428 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:51:25,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:51:25,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1508239364, now seen corresponding path program 74 times [2021-05-02 23:51:25,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:51:25,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708303242] [2021-05-02 23:51:25,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:51:25,688 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_3075 1000000) InVars {main_~i~0=v_main_~i~0_3075} OutVars{main_~i~0=v_main_~i~0_3075} AuxVars[] AssignedVars[] [2021-05-02 23:51:25,689 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:51:25,695 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:25,704 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:51:25,723 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:51:25,749 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:51:25,751 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_3077 999998) InVars {main_~i~0=v_main_~i~0_3077} OutVars{main_~i~0=v_main_~i~0_3077} AuxVars[] AssignedVars[] [2021-05-02 23:51:25,753 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:51:25,755 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:25,763 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:51:25,790 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:51:25,812 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:51:25,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:51:25,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:51:25,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:51:25,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:51:31,109 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:51:31,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708303242] [2021-05-02 23:51:31,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1708303242] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:51:31,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:51:31,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2021-05-02 23:51:31,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192138388] [2021-05-02 23:51:31,110 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-05-02 23:51:31,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:51:31,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-05-02 23:51:31,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=6564, Unknown=0, NotChecked=0, Total=6806 [2021-05-02 23:51:31,111 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand has 82 states, 81 states have (on average 1.9135802469135803) internal successors, (155), 80 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:51:45,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:51:45,754 INFO L93 Difference]: Finished difference Result 168 states and 168 transitions. [2021-05-02 23:51:45,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-05-02 23:51:45,755 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 81 states have (on average 1.9135802469135803) internal successors, (155), 80 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 159 [2021-05-02 23:51:45,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:51:45,756 INFO L225 Difference]: With dead ends: 168 [2021-05-02 23:51:45,756 INFO L226 Difference]: Without dead ends: 163 [2021-05-02 23:51:45,758 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 59 SyntacticMatches, 19 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2968 ImplicationChecksByTransitivity, 11651.0ms TimeCoverageRelationStatistics Valid=618, Invalid=24188, Unknown=0, NotChecked=0, Total=24806 [2021-05-02 23:51:45,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-05-02 23:51:45,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2021-05-02 23:51:45,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 157 states have (on average 1.0063694267515924) internal successors, (158), 157 states have internal predecessors, (158), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:51:45,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 162 transitions. [2021-05-02 23:51:45,796 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 162 transitions. Word has length 159 [2021-05-02 23:51:45,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:51:45,804 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 162 transitions. [2021-05-02 23:51:45,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 82 states, 81 states have (on average 1.9135802469135803) internal successors, (155), 80 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:51:45,804 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 162 transitions. [2021-05-02 23:51:45,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-05-02 23:51:45,804 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:51:45,805 INFO L523 BasicCegarLoop]: trace histogram [75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:51:45,805 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-05-02 23:51:45,805 INFO L428 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:51:45,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:51:45,805 INFO L82 PathProgramCache]: Analyzing trace with hash -912054694, now seen corresponding path program 75 times [2021-05-02 23:51:45,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:51:45,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202405763] [2021-05-02 23:51:45,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:51:45,814 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_3154 1000000) InVars {main_~i~0=v_main_~i~0_3154} OutVars{main_~i~0=v_main_~i~0_3154} AuxVars[] AssignedVars[] [2021-05-02 23:51:45,816 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:51:45,817 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:45,824 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:51:45,853 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:51:45,881 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:51:45,883 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_3156 999998) InVars {main_~i~0=v_main_~i~0_3156} OutVars{main_~i~0=v_main_~i~0_3156} AuxVars[] AssignedVars[] [2021-05-02 23:51:45,885 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:51:45,896 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:45,908 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:51:45,930 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:51:45,956 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:51:45,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:51:46,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:51:46,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:51:46,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:51:50,849 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:51:50,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202405763] [2021-05-02 23:51:50,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [202405763] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:51:50,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:51:50,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2021-05-02 23:51:50,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858412264] [2021-05-02 23:51:50,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 83 states [2021-05-02 23:51:50,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:51:50,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-05-02 23:51:50,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=6727, Unknown=0, NotChecked=0, Total=6972 [2021-05-02 23:51:50,851 INFO L87 Difference]: Start difference. First operand 162 states and 162 transitions. Second operand has 83 states, 82 states have (on average 1.9146341463414633) internal successors, (157), 81 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:52:04,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:52:04,231 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2021-05-02 23:52:04,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-05-02 23:52:04,234 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 1.9146341463414633) internal successors, (157), 81 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 161 [2021-05-02 23:52:04,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:52:04,235 INFO L225 Difference]: With dead ends: 170 [2021-05-02 23:52:04,235 INFO L226 Difference]: Without dead ends: 165 [2021-05-02 23:52:04,236 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 62 SyntacticMatches, 17 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3041 ImplicationChecksByTransitivity, 10725.2ms TimeCoverageRelationStatistics Valid=626, Invalid=24814, Unknown=0, NotChecked=0, Total=25440 [2021-05-02 23:52:04,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-05-02 23:52:04,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2021-05-02 23:52:04,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 159 states have (on average 1.0062893081761006) internal successors, (160), 159 states have internal predecessors, (160), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:52:04,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 164 transitions. [2021-05-02 23:52:04,275 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 164 transitions. Word has length 161 [2021-05-02 23:52:04,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:52:04,276 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 164 transitions. [2021-05-02 23:52:04,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 83 states, 82 states have (on average 1.9146341463414633) internal successors, (157), 81 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:52:04,276 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 164 transitions. [2021-05-02 23:52:04,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-05-02 23:52:04,277 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:52:04,277 INFO L523 BasicCegarLoop]: trace histogram [76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:52:04,277 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2021-05-02 23:52:04,277 INFO L428 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:52:04,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:52:04,277 INFO L82 PathProgramCache]: Analyzing trace with hash 790762808, now seen corresponding path program 76 times [2021-05-02 23:52:04,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:52:04,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [418380257] [2021-05-02 23:52:04,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:52:04,287 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_3234 1000000) InVars {main_~i~0=v_main_~i~0_3234} OutVars{main_~i~0=v_main_~i~0_3234} AuxVars[] AssignedVars[] [2021-05-02 23:52:04,289 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:52:04,290 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:04,300 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:52:04,336 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:52:04,363 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:52:04,366 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_3236 999998) InVars {main_~i~0=v_main_~i~0_3236} OutVars{main_~i~0=v_main_~i~0_3236} AuxVars[] AssignedVars[] [2021-05-02 23:52:04,368 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:52:04,370 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:04,380 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:52:04,414 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:52:04,440 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:52:04,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:52:04,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:52:04,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:52:04,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:52:10,056 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:52:10,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [418380257] [2021-05-02 23:52:10,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [418380257] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:52:10,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:52:10,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2021-05-02 23:52:10,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397286744] [2021-05-02 23:52:10,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 84 states [2021-05-02 23:52:10,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:52:10,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-05-02 23:52:10,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=6892, Unknown=0, NotChecked=0, Total=7140 [2021-05-02 23:52:10,059 INFO L87 Difference]: Start difference. First operand 164 states and 164 transitions. Second operand has 84 states, 83 states have (on average 1.9156626506024097) internal successors, (159), 82 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:52:25,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:52:25,416 INFO L93 Difference]: Finished difference Result 172 states and 172 transitions. [2021-05-02 23:52:25,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-05-02 23:52:25,418 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 83 states have (on average 1.9156626506024097) internal successors, (159), 82 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 163 [2021-05-02 23:52:25,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:52:25,419 INFO L225 Difference]: With dead ends: 172 [2021-05-02 23:52:25,419 INFO L226 Difference]: Without dead ends: 167 [2021-05-02 23:52:25,421 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 63 SyntacticMatches, 17 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3119 ImplicationChecksByTransitivity, 12248.7ms TimeCoverageRelationStatistics Valid=634, Invalid=25448, Unknown=0, NotChecked=0, Total=26082 [2021-05-02 23:52:25,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-05-02 23:52:25,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2021-05-02 23:52:25,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 161 states have (on average 1.0062111801242235) internal successors, (162), 161 states have internal predecessors, (162), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:52:25,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 166 transitions. [2021-05-02 23:52:25,461 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 166 transitions. Word has length 163 [2021-05-02 23:52:25,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:52:25,461 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 166 transitions. [2021-05-02 23:52:25,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 84 states, 83 states have (on average 1.9156626506024097) internal successors, (159), 82 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:52:25,462 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 166 transitions. [2021-05-02 23:52:25,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-05-02 23:52:25,462 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:52:25,462 INFO L523 BasicCegarLoop]: trace histogram [77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:52:25,462 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-05-02 23:52:25,462 INFO L428 AbstractCegarLoop]: === Iteration 78 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:52:25,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:52:25,463 INFO L82 PathProgramCache]: Analyzing trace with hash 815842454, now seen corresponding path program 77 times [2021-05-02 23:52:25,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:52:25,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1284624559] [2021-05-02 23:52:25,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:52:25,481 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_3315 1000000) InVars {main_~i~0=v_main_~i~0_3315} OutVars{main_~i~0=v_main_~i~0_3315} AuxVars[] AssignedVars[] [2021-05-02 23:52:25,485 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:52:25,494 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:25,505 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:52:25,522 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:52:25,544 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:52:25,545 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_3317 999998) InVars {main_~i~0=v_main_~i~0_3317} OutVars{main_~i~0=v_main_~i~0_3317} AuxVars[] AssignedVars[] [2021-05-02 23:52:25,546 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:52:25,557 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:25,565 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:52:25,582 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:52:25,607 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:52:25,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:52:25,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:52:25,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:52:25,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:52:31,941 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:52:31,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1284624559] [2021-05-02 23:52:31,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1284624559] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:52:31,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:52:31,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2021-05-02 23:52:31,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060241854] [2021-05-02 23:52:31,942 INFO L460 AbstractCegarLoop]: Interpolant automaton has 85 states [2021-05-02 23:52:31,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:52:31,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-05-02 23:52:31,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=7059, Unknown=0, NotChecked=0, Total=7310 [2021-05-02 23:52:31,943 INFO L87 Difference]: Start difference. First operand 166 states and 166 transitions. Second operand has 85 states, 84 states have (on average 1.9166666666666667) internal successors, (161), 83 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:52:48,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:52:48,512 INFO L93 Difference]: Finished difference Result 174 states and 174 transitions. [2021-05-02 23:52:48,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-05-02 23:52:48,514 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 84 states have (on average 1.9166666666666667) internal successors, (161), 83 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 165 [2021-05-02 23:52:48,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:52:48,514 INFO L225 Difference]: With dead ends: 174 [2021-05-02 23:52:48,515 INFO L226 Difference]: Without dead ends: 169 [2021-05-02 23:52:48,516 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 61 SyntacticMatches, 20 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3204 ImplicationChecksByTransitivity, 13330.8ms TimeCoverageRelationStatistics Valid=642, Invalid=26090, Unknown=0, NotChecked=0, Total=26732 [2021-05-02 23:52:48,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-05-02 23:52:48,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 168. [2021-05-02 23:52:48,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 163 states have (on average 1.0061349693251533) internal successors, (164), 163 states have internal predecessors, (164), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:52:48,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 168 transitions. [2021-05-02 23:52:48,561 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 168 transitions. Word has length 165 [2021-05-02 23:52:48,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:52:48,561 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 168 transitions. [2021-05-02 23:52:48,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 85 states, 84 states have (on average 1.9166666666666667) internal successors, (161), 83 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:52:48,561 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 168 transitions. [2021-05-02 23:52:48,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-05-02 23:52:48,562 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:52:48,562 INFO L523 BasicCegarLoop]: trace histogram [78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:52:48,562 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-05-02 23:52:48,562 INFO L428 AbstractCegarLoop]: === Iteration 79 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:52:48,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:52:48,562 INFO L82 PathProgramCache]: Analyzing trace with hash -852421516, now seen corresponding path program 78 times [2021-05-02 23:52:48,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:52:48,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [295482418] [2021-05-02 23:52:48,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:52:48,576 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_3397 1000000) InVars {main_~i~0=v_main_~i~0_3397} OutVars{main_~i~0=v_main_~i~0_3397} AuxVars[] AssignedVars[] [2021-05-02 23:52:48,579 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:52:48,594 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:48,606 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:52:48,629 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:52:48,659 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:52:48,661 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_3399 999998) InVars {main_~i~0=v_main_~i~0_3399} OutVars{main_~i~0=v_main_~i~0_3399} AuxVars[] AssignedVars[] [2021-05-02 23:52:48,663 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:52:48,676 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:48,686 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:52:48,706 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:52:48,734 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:52:48,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:52:48,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:52:48,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:52:48,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:52:55,523 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:52:55,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [295482418] [2021-05-02 23:52:55,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [295482418] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:52:55,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:52:55,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2021-05-02 23:52:55,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564066390] [2021-05-02 23:52:55,525 INFO L460 AbstractCegarLoop]: Interpolant automaton has 86 states [2021-05-02 23:52:55,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:52:55,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-05-02 23:52:55,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=7228, Unknown=0, NotChecked=0, Total=7482 [2021-05-02 23:52:55,526 INFO L87 Difference]: Start difference. First operand 168 states and 168 transitions. Second operand has 86 states, 85 states have (on average 1.9176470588235295) internal successors, (163), 84 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:53:12,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:53:12,975 INFO L93 Difference]: Finished difference Result 176 states and 176 transitions. [2021-05-02 23:53:12,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-05-02 23:53:12,977 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 85 states have (on average 1.9176470588235295) internal successors, (163), 84 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 167 [2021-05-02 23:53:12,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:53:12,978 INFO L225 Difference]: With dead ends: 176 [2021-05-02 23:53:12,978 INFO L226 Difference]: Without dead ends: 171 [2021-05-02 23:53:12,980 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 63 SyntacticMatches, 19 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3282 ImplicationChecksByTransitivity, 14184.7ms TimeCoverageRelationStatistics Valid=650, Invalid=26740, Unknown=0, NotChecked=0, Total=27390 [2021-05-02 23:53:12,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-05-02 23:53:13,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 170. [2021-05-02 23:53:13,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 165 states have (on average 1.006060606060606) internal successors, (166), 165 states have internal predecessors, (166), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:53:13,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 170 transitions. [2021-05-02 23:53:13,022 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 170 transitions. Word has length 167 [2021-05-02 23:53:13,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:53:13,023 INFO L480 AbstractCegarLoop]: Abstraction has 170 states and 170 transitions. [2021-05-02 23:53:13,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 86 states, 85 states have (on average 1.9176470588235295) internal successors, (163), 84 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:53:13,023 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 170 transitions. [2021-05-02 23:53:13,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-05-02 23:53:13,024 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:53:13,024 INFO L523 BasicCegarLoop]: trace histogram [79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:53:13,024 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2021-05-02 23:53:13,024 INFO L428 AbstractCegarLoop]: === Iteration 80 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:53:13,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:53:13,025 INFO L82 PathProgramCache]: Analyzing trace with hash -2031295278, now seen corresponding path program 79 times [2021-05-02 23:53:13,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:53:13,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1234152466] [2021-05-02 23:53:13,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:53:13,041 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_3480 1000000) InVars {main_~i~0=v_main_~i~0_3480} OutVars{main_~i~0=v_main_~i~0_3480} AuxVars[] AssignedVars[] [2021-05-02 23:53:13,044 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:53:13,058 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:53:13,070 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:53:13,095 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:53:13,131 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:53:13,133 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_3482 999998) InVars {main_~i~0=v_main_~i~0_3482} OutVars{main_~i~0=v_main_~i~0_3482} AuxVars[] AssignedVars[] [2021-05-02 23:53:13,136 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:53:13,149 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:53:13,159 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:53:13,185 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:53:13,219 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:53:13,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:53:13,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:53:13,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:53:13,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:53:20,523 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:53:20,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1234152466] [2021-05-02 23:53:20,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1234152466] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:53:20,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:53:20,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2021-05-02 23:53:20,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633492244] [2021-05-02 23:53:20,524 INFO L460 AbstractCegarLoop]: Interpolant automaton has 87 states [2021-05-02 23:53:20,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:53:20,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-05-02 23:53:20,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=7399, Unknown=0, NotChecked=0, Total=7656 [2021-05-02 23:53:20,525 INFO L87 Difference]: Start difference. First operand 170 states and 170 transitions. Second operand has 87 states, 86 states have (on average 1.9186046511627908) internal successors, (165), 85 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:53:40,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:53:40,608 INFO L93 Difference]: Finished difference Result 178 states and 178 transitions. [2021-05-02 23:53:40,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-05-02 23:53:40,611 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 86 states have (on average 1.9186046511627908) internal successors, (165), 85 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 169 [2021-05-02 23:53:40,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:53:40,612 INFO L225 Difference]: With dead ends: 178 [2021-05-02 23:53:40,612 INFO L226 Difference]: Without dead ends: 173 [2021-05-02 23:53:40,614 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 60 SyntacticMatches, 23 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3371 ImplicationChecksByTransitivity, 15621.3ms TimeCoverageRelationStatistics Valid=658, Invalid=27398, Unknown=0, NotChecked=0, Total=28056 [2021-05-02 23:53:40,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-05-02 23:53:40,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 172. [2021-05-02 23:53:40,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 167 states have (on average 1.0059880239520957) internal successors, (168), 167 states have internal predecessors, (168), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:53:40,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 172 transitions. [2021-05-02 23:53:40,664 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 172 transitions. Word has length 169 [2021-05-02 23:53:40,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:53:40,664 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 172 transitions. [2021-05-02 23:53:40,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 87 states, 86 states have (on average 1.9186046511627908) internal successors, (165), 85 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:53:40,665 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 172 transitions. [2021-05-02 23:53:40,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-05-02 23:53:40,665 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:53:40,666 INFO L523 BasicCegarLoop]: trace histogram [80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:53:40,666 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-05-02 23:53:40,666 INFO L428 AbstractCegarLoop]: === Iteration 81 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:53:40,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:53:40,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1057614416, now seen corresponding path program 80 times [2021-05-02 23:53:40,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:53:40,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [706192100] [2021-05-02 23:53:40,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:53:40,681 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_3564 1000000) InVars {main_~i~0=v_main_~i~0_3564} OutVars{main_~i~0=v_main_~i~0_3564} AuxVars[] AssignedVars[] [2021-05-02 23:53:40,684 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:53:40,686 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:53:40,698 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:53:40,740 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:53:40,778 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:53:40,782 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_3566 999998) InVars {main_~i~0=v_main_~i~0_3566} OutVars{main_~i~0=v_main_~i~0_3566} AuxVars[] AssignedVars[] [2021-05-02 23:53:40,785 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:53:40,799 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:53:40,811 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:53:40,840 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:53:40,876 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:53:40,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:53:40,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:53:40,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:53:40,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:53:48,951 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:53:48,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [706192100] [2021-05-02 23:53:48,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [706192100] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:53:48,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:53:48,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2021-05-02 23:53:48,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250369580] [2021-05-02 23:53:48,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 88 states [2021-05-02 23:53:48,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:53:48,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-05-02 23:53:48,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=7572, Unknown=0, NotChecked=0, Total=7832 [2021-05-02 23:53:48,954 INFO L87 Difference]: Start difference. First operand 172 states and 172 transitions. Second operand has 88 states, 87 states have (on average 1.9195402298850575) internal successors, (167), 86 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:54:09,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:54:09,771 INFO L93 Difference]: Finished difference Result 180 states and 180 transitions. [2021-05-02 23:54:09,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-05-02 23:54:09,772 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 87 states have (on average 1.9195402298850575) internal successors, (167), 86 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 171 [2021-05-02 23:54:09,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:54:09,774 INFO L225 Difference]: With dead ends: 180 [2021-05-02 23:54:09,774 INFO L226 Difference]: Without dead ends: 175 [2021-05-02 23:54:09,776 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 65 SyntacticMatches, 19 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3445 ImplicationChecksByTransitivity, 16470.1ms TimeCoverageRelationStatistics Valid=666, Invalid=28064, Unknown=0, NotChecked=0, Total=28730 [2021-05-02 23:54:09,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-05-02 23:54:09,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2021-05-02 23:54:09,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 169 states have (on average 1.0059171597633136) internal successors, (170), 169 states have internal predecessors, (170), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:54:09,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 174 transitions. [2021-05-02 23:54:09,839 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 174 transitions. Word has length 171 [2021-05-02 23:54:09,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:54:09,839 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 174 transitions. [2021-05-02 23:54:09,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 88 states, 87 states have (on average 1.9195402298850575) internal successors, (167), 86 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:54:09,839 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 174 transitions. [2021-05-02 23:54:09,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-05-02 23:54:09,840 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:54:09,840 INFO L523 BasicCegarLoop]: trace histogram [81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:54:09,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2021-05-02 23:54:09,840 INFO L428 AbstractCegarLoop]: === Iteration 82 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:54:09,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:54:09,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1653176562, now seen corresponding path program 81 times [2021-05-02 23:54:09,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:54:09,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [388195101] [2021-05-02 23:54:09,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:54:09,852 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_3649 1000000) InVars {main_~i~0=v_main_~i~0_3649} OutVars{main_~i~0=v_main_~i~0_3649} AuxVars[] AssignedVars[] [2021-05-02 23:54:09,854 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:54:09,866 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:54:09,876 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:54:09,900 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:54:09,936 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:54:09,939 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_3651 999998) InVars {main_~i~0=v_main_~i~0_3651} OutVars{main_~i~0=v_main_~i~0_3651} AuxVars[] AssignedVars[] [2021-05-02 23:54:09,941 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:54:09,953 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:54:09,963 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:54:09,990 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:54:10,022 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:54:10,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:54:10,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:54:10,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:54:10,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:54:17,683 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:54:17,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [388195101] [2021-05-02 23:54:17,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [388195101] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:54:17,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:54:17,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2021-05-02 23:54:17,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660565391] [2021-05-02 23:54:17,684 INFO L460 AbstractCegarLoop]: Interpolant automaton has 89 states [2021-05-02 23:54:17,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:54:17,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-05-02 23:54:17,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=7747, Unknown=0, NotChecked=0, Total=8010 [2021-05-02 23:54:17,685 INFO L87 Difference]: Start difference. First operand 174 states and 174 transitions. Second operand has 89 states, 88 states have (on average 1.9204545454545454) internal successors, (169), 87 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:54:39,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:54:39,909 INFO L93 Difference]: Finished difference Result 182 states and 182 transitions. [2021-05-02 23:54:39,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-05-02 23:54:39,909 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 88 states have (on average 1.9204545454545454) internal successors, (169), 87 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 173 [2021-05-02 23:54:39,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:54:39,911 INFO L225 Difference]: With dead ends: 182 [2021-05-02 23:54:39,911 INFO L226 Difference]: Without dead ends: 177 [2021-05-02 23:54:39,912 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 69 SyntacticMatches, 16 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3522 ImplicationChecksByTransitivity, 16602.6ms TimeCoverageRelationStatistics Valid=674, Invalid=28738, Unknown=0, NotChecked=0, Total=29412 [2021-05-02 23:54:39,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-05-02 23:54:39,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2021-05-02 23:54:39,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 171 states have (on average 1.0058479532163742) internal successors, (172), 171 states have internal predecessors, (172), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:54:39,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 176 transitions. [2021-05-02 23:54:39,956 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 176 transitions. Word has length 173 [2021-05-02 23:54:39,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:54:39,956 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 176 transitions. [2021-05-02 23:54:39,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 89 states, 88 states have (on average 1.9204545454545454) internal successors, (169), 87 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:54:39,957 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 176 transitions. [2021-05-02 23:54:39,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-05-02 23:54:39,957 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:54:39,957 INFO L523 BasicCegarLoop]: trace histogram [82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:54:39,957 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2021-05-02 23:54:39,957 INFO L428 AbstractCegarLoop]: === Iteration 83 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:54:39,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:54:39,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1537218796, now seen corresponding path program 82 times [2021-05-02 23:54:39,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:54:39,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1518889098] [2021-05-02 23:54:39,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:54:39,966 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_3735 1000000) InVars {main_~i~0=v_main_~i~0_3735} OutVars{main_~i~0=v_main_~i~0_3735} AuxVars[] AssignedVars[] [2021-05-02 23:54:39,969 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:54:39,983 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:54:40,005 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:54:40,030 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:54:40,059 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:54:40,062 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_3737 999998) InVars {main_~i~0=v_main_~i~0_3737} OutVars{main_~i~0=v_main_~i~0_3737} AuxVars[] AssignedVars[] [2021-05-02 23:54:40,064 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:54:40,076 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:54:40,085 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:54:40,106 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:54:40,135 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:54:40,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:54:40,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:54:40,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:54:40,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:54:48,428 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:54:48,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1518889098] [2021-05-02 23:54:48,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1518889098] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:54:48,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:54:48,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2021-05-02 23:54:48,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744163647] [2021-05-02 23:54:48,429 INFO L460 AbstractCegarLoop]: Interpolant automaton has 90 states [2021-05-02 23:54:48,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:54:48,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-05-02 23:54:48,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=7924, Unknown=0, NotChecked=0, Total=8190 [2021-05-02 23:54:48,431 INFO L87 Difference]: Start difference. First operand 176 states and 176 transitions. Second operand has 90 states, 89 states have (on average 1.9213483146067416) internal successors, (171), 88 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:55:13,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:55:13,510 INFO L93 Difference]: Finished difference Result 184 states and 184 transitions. [2021-05-02 23:55:13,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-05-02 23:55:13,512 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 89 states have (on average 1.9213483146067416) internal successors, (171), 88 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 175 [2021-05-02 23:55:13,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:55:13,513 INFO L225 Difference]: With dead ends: 184 [2021-05-02 23:55:13,513 INFO L226 Difference]: Without dead ends: 179 [2021-05-02 23:55:13,515 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 68 SyntacticMatches, 18 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3610 ImplicationChecksByTransitivity, 18167.9ms TimeCoverageRelationStatistics Valid=682, Invalid=29420, Unknown=0, NotChecked=0, Total=30102 [2021-05-02 23:55:13,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-05-02 23:55:13,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 178. [2021-05-02 23:55:13,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 173 states have (on average 1.0057803468208093) internal successors, (174), 173 states have internal predecessors, (174), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:55:13,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 178 transitions. [2021-05-02 23:55:13,567 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 178 transitions. Word has length 175 [2021-05-02 23:55:13,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:55:13,568 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 178 transitions. [2021-05-02 23:55:13,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 90 states, 89 states have (on average 1.9213483146067416) internal successors, (171), 88 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:55:13,568 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 178 transitions. [2021-05-02 23:55:13,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-05-02 23:55:13,569 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:55:13,569 INFO L523 BasicCegarLoop]: trace histogram [83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:55:13,569 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2021-05-02 23:55:13,569 INFO L428 AbstractCegarLoop]: === Iteration 84 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:55:13,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:55:13,570 INFO L82 PathProgramCache]: Analyzing trace with hash 900508490, now seen corresponding path program 83 times [2021-05-02 23:55:13,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:55:13,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430211387] [2021-05-02 23:55:13,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:55:13,578 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_3822 1000000) InVars {main_~i~0=v_main_~i~0_3822} OutVars{main_~i~0=v_main_~i~0_3822} AuxVars[] AssignedVars[] [2021-05-02 23:55:13,580 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:55:13,595 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:55:13,606 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:55:13,630 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:55:13,664 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:55:13,666 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_3824 999998) InVars {main_~i~0=v_main_~i~0_3824} OutVars{main_~i~0=v_main_~i~0_3824} AuxVars[] AssignedVars[] [2021-05-02 23:55:13,669 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:55:13,682 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:55:13,695 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:55:13,722 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:55:13,759 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:55:13,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:55:13,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:55:13,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:55:13,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:55:23,201 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:55:23,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430211387] [2021-05-02 23:55:23,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [430211387] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:55:23,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:55:23,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2021-05-02 23:55:23,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139885239] [2021-05-02 23:55:23,202 INFO L460 AbstractCegarLoop]: Interpolant automaton has 91 states [2021-05-02 23:55:23,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:55:23,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-05-02 23:55:23,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=8103, Unknown=0, NotChecked=0, Total=8372 [2021-05-02 23:55:23,204 INFO L87 Difference]: Start difference. First operand 178 states and 178 transitions. Second operand has 91 states, 90 states have (on average 1.9222222222222223) internal successors, (173), 89 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:55:53,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:55:53,407 INFO L93 Difference]: Finished difference Result 186 states and 186 transitions. [2021-05-02 23:55:53,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-05-02 23:55:53,409 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 90 states have (on average 1.9222222222222223) internal successors, (173), 89 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 177 [2021-05-02 23:55:53,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:55:53,410 INFO L225 Difference]: With dead ends: 186 [2021-05-02 23:55:53,410 INFO L226 Difference]: Without dead ends: 181 [2021-05-02 23:55:53,412 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 68 SyntacticMatches, 19 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3697 ImplicationChecksByTransitivity, 21442.5ms TimeCoverageRelationStatistics Valid=690, Invalid=30110, Unknown=0, NotChecked=0, Total=30800 [2021-05-02 23:55:53,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-05-02 23:55:53,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 180. [2021-05-02 23:55:53,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 175 states have (on average 1.0057142857142858) internal successors, (176), 175 states have internal predecessors, (176), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:55:53,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 180 transitions. [2021-05-02 23:55:53,460 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 180 transitions. Word has length 177 [2021-05-02 23:55:53,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:55:53,460 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 180 transitions. [2021-05-02 23:55:53,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 91 states, 90 states have (on average 1.9222222222222223) internal successors, (173), 89 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:55:53,461 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 180 transitions. [2021-05-02 23:55:53,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-05-02 23:55:53,461 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:55:53,461 INFO L523 BasicCegarLoop]: trace histogram [84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:55:53,462 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2021-05-02 23:55:53,462 INFO L428 AbstractCegarLoop]: === Iteration 85 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:55:53,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:55:53,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1092739544, now seen corresponding path program 84 times [2021-05-02 23:55:53,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:55:53,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542047846] [2021-05-02 23:55:53,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:55:53,475 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_3910 1000000) InVars {main_~i~0=v_main_~i~0_3910} OutVars{main_~i~0=v_main_~i~0_3910} AuxVars[] AssignedVars[] [2021-05-02 23:55:53,478 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:55:53,495 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:55:53,507 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:55:53,538 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:55:53,602 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:55:53,607 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_3912 999998) InVars {main_~i~0=v_main_~i~0_3912} OutVars{main_~i~0=v_main_~i~0_3912} AuxVars[] AssignedVars[] [2021-05-02 23:55:53,610 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:55:53,627 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:55:53,643 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:55:53,670 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:55:53,710 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:55:53,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:55:53,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:55:53,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:55:53,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:56:05,163 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:56:05,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542047846] [2021-05-02 23:56:05,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [542047846] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:56:05,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:56:05,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2021-05-02 23:56:05,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347113875] [2021-05-02 23:56:05,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 92 states [2021-05-02 23:56:05,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:56:05,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-05-02 23:56:05,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=8284, Unknown=0, NotChecked=0, Total=8556 [2021-05-02 23:56:05,166 INFO L87 Difference]: Start difference. First operand 180 states and 180 transitions. Second operand has 92 states, 91 states have (on average 1.9230769230769231) internal successors, (175), 90 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:56:33,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:56:33,972 INFO L93 Difference]: Finished difference Result 188 states and 188 transitions. [2021-05-02 23:56:33,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-05-02 23:56:33,975 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 91 states have (on average 1.9230769230769231) internal successors, (175), 90 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 179 [2021-05-02 23:56:33,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:56:33,976 INFO L225 Difference]: With dead ends: 188 [2021-05-02 23:56:33,976 INFO L226 Difference]: Without dead ends: 183 [2021-05-02 23:56:33,977 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 64 SyntacticMatches, 24 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3793 ImplicationChecksByTransitivity, 22644.3ms TimeCoverageRelationStatistics Valid=698, Invalid=30808, Unknown=0, NotChecked=0, Total=31506 [2021-05-02 23:56:33,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-05-02 23:56:34,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 182. [2021-05-02 23:56:34,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 177 states have (on average 1.0056497175141244) internal successors, (178), 177 states have internal predecessors, (178), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:56:34,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 182 transitions. [2021-05-02 23:56:34,022 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 182 transitions. Word has length 179 [2021-05-02 23:56:34,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:56:34,022 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 182 transitions. [2021-05-02 23:56:34,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 92 states, 91 states have (on average 1.9230769230769231) internal successors, (175), 90 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:56:34,022 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 182 transitions. [2021-05-02 23:56:34,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-05-02 23:56:34,023 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:56:34,023 INFO L523 BasicCegarLoop]: trace histogram [85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:56:34,023 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2021-05-02 23:56:34,023 INFO L428 AbstractCegarLoop]: === Iteration 86 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:56:34,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:56:34,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1048686202, now seen corresponding path program 85 times [2021-05-02 23:56:34,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:56:34,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1993195018] [2021-05-02 23:56:34,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:56:34,032 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_3999 1000000) InVars {main_~i~0=v_main_~i~0_3999} OutVars{main_~i~0=v_main_~i~0_3999} AuxVars[] AssignedVars[] [2021-05-02 23:56:34,035 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:56:34,036 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:56:34,046 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:56:34,078 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:56:34,118 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:56:34,123 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_4001 999998) InVars {main_~i~0=v_main_~i~0_4001} OutVars{main_~i~0=v_main_~i~0_4001} AuxVars[] AssignedVars[] [2021-05-02 23:56:34,126 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:56:34,142 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:56:34,161 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:56:34,203 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:56:34,255 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:56:34,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:56:34,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:56:34,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:56:34,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:56:44,428 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:56:44,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1993195018] [2021-05-02 23:56:44,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1993195018] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:56:44,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:56:44,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2021-05-02 23:56:44,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224741690] [2021-05-02 23:56:44,429 INFO L460 AbstractCegarLoop]: Interpolant automaton has 93 states [2021-05-02 23:56:44,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:56:44,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-05-02 23:56:44,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=8467, Unknown=0, NotChecked=0, Total=8742 [2021-05-02 23:56:44,431 INFO L87 Difference]: Start difference. First operand 182 states and 182 transitions. Second operand has 93 states, 92 states have (on average 1.923913043478261) internal successors, (177), 91 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:57:14,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:57:14,037 INFO L93 Difference]: Finished difference Result 190 states and 190 transitions. [2021-05-02 23:57:14,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-05-02 23:57:14,041 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 92 states have (on average 1.923913043478261) internal successors, (177), 91 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 181 [2021-05-02 23:57:14,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:57:14,042 INFO L225 Difference]: With dead ends: 190 [2021-05-02 23:57:14,042 INFO L226 Difference]: Without dead ends: 185 [2021-05-02 23:57:14,044 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 68 SyntacticMatches, 21 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3874 ImplicationChecksByTransitivity, 21483.6ms TimeCoverageRelationStatistics Valid=706, Invalid=31514, Unknown=0, NotChecked=0, Total=32220 [2021-05-02 23:57:14,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-05-02 23:57:14,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2021-05-02 23:57:14,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 179 states have (on average 1.005586592178771) internal successors, (180), 179 states have internal predecessors, (180), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:57:14,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 184 transitions. [2021-05-02 23:57:14,093 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 184 transitions. Word has length 181 [2021-05-02 23:57:14,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:57:14,094 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 184 transitions. [2021-05-02 23:57:14,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 93 states, 92 states have (on average 1.923913043478261) internal successors, (177), 91 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:57:14,094 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 184 transitions. [2021-05-02 23:57:14,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-05-02 23:57:14,095 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:57:14,095 INFO L523 BasicCegarLoop]: trace histogram [86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:57:14,095 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2021-05-02 23:57:14,095 INFO L428 AbstractCegarLoop]: === Iteration 87 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:57:14,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:57:14,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1663097500, now seen corresponding path program 86 times [2021-05-02 23:57:14,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:57:14,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [222362365] [2021-05-02 23:57:14,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:57:14,113 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_4089 1000000) InVars {main_~i~0=v_main_~i~0_4089} OutVars{main_~i~0=v_main_~i~0_4089} AuxVars[] AssignedVars[] [2021-05-02 23:57:14,117 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:57:14,144 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:57:14,163 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:57:14,202 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:57:14,262 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:57:14,266 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_4091 999998) InVars {main_~i~0=v_main_~i~0_4091} OutVars{main_~i~0=v_main_~i~0_4091} AuxVars[] AssignedVars[] [2021-05-02 23:57:14,274 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:57:14,277 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:57:14,296 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:57:14,363 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:57:14,423 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:57:14,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:57:14,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:57:14,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:57:14,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:57:23,064 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:57:23,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [222362365] [2021-05-02 23:57:23,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [222362365] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:57:23,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:57:23,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2021-05-02 23:57:23,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302931358] [2021-05-02 23:57:23,065 INFO L460 AbstractCegarLoop]: Interpolant automaton has 94 states [2021-05-02 23:57:23,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:57:23,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-05-02 23:57:23,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=8652, Unknown=0, NotChecked=0, Total=8930 [2021-05-02 23:57:23,067 INFO L87 Difference]: Start difference. First operand 184 states and 184 transitions. Second operand has 94 states, 93 states have (on average 1.924731182795699) internal successors, (179), 92 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:57:39,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:57:39,735 INFO L93 Difference]: Finished difference Result 192 states and 192 transitions. [2021-05-02 23:57:39,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-05-02 23:57:39,736 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 93 states have (on average 1.924731182795699) internal successors, (179), 92 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 183 [2021-05-02 23:57:39,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:57:39,737 INFO L225 Difference]: With dead ends: 192 [2021-05-02 23:57:39,737 INFO L226 Difference]: Without dead ends: 187 [2021-05-02 23:57:39,738 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 73 SyntacticMatches, 17 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3954 ImplicationChecksByTransitivity, 15052.6ms TimeCoverageRelationStatistics Valid=714, Invalid=32228, Unknown=0, NotChecked=0, Total=32942 [2021-05-02 23:57:39,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-05-02 23:57:39,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 186. [2021-05-02 23:57:39,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 181 states have (on average 1.0055248618784531) internal successors, (182), 181 states have internal predecessors, (182), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:57:39,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 186 transitions. [2021-05-02 23:57:39,786 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 186 transitions. Word has length 183 [2021-05-02 23:57:39,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:57:39,786 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 186 transitions. [2021-05-02 23:57:39,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 94 states, 93 states have (on average 1.924731182795699) internal successors, (179), 92 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:57:39,786 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 186 transitions. [2021-05-02 23:57:39,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-05-02 23:57:39,787 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:57:39,787 INFO L523 BasicCegarLoop]: trace histogram [87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:57:39,787 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2021-05-02 23:57:39,787 INFO L428 AbstractCegarLoop]: === Iteration 88 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:57:39,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:57:39,788 INFO L82 PathProgramCache]: Analyzing trace with hash 593131970, now seen corresponding path program 87 times [2021-05-02 23:57:39,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:57:39,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1420435318] [2021-05-02 23:57:39,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:57:39,795 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_4180 1000000) InVars {main_~i~0=v_main_~i~0_4180} OutVars{main_~i~0=v_main_~i~0_4180} AuxVars[] AssignedVars[] [2021-05-02 23:57:39,799 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:57:39,809 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:57:39,820 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:57:39,841 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:57:39,866 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:57:39,868 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_4182 999998) InVars {main_~i~0=v_main_~i~0_4182} OutVars{main_~i~0=v_main_~i~0_4182} AuxVars[] AssignedVars[] [2021-05-02 23:57:39,869 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size [2021-05-02 23:57:39,877 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:57:39,884 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-02 23:57:39,897 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.6 percent of original size 50 [2021-05-02 23:57:39,919 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:57:39,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:57:39,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:57:39,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:57:39,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:57:46,100 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:57:46,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1420435318] [2021-05-02 23:57:46,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1420435318] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:57:46,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:57:46,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2021-05-02 23:57:46,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936292790] [2021-05-02 23:57:46,101 INFO L460 AbstractCegarLoop]: Interpolant automaton has 95 states [2021-05-02 23:57:46,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:57:46,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-05-02 23:57:46,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=8839, Unknown=0, NotChecked=0, Total=9120 [2021-05-02 23:57:46,102 INFO L87 Difference]: Start difference. First operand 186 states and 186 transitions. Second operand has 95 states, 94 states have (on average 1.925531914893617) internal successors, (181), 93 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)