/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/loops-crafted-1/mono-crafted_13.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-03 00:06:47,574 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 00:06:47,576 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 00:06:47,606 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-03 00:06:47,606 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-03 00:06:47,608 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-03 00:06:47,610 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-03 00:06:47,614 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-03 00:06:47,616 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-03 00:06:47,619 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-03 00:06:47,620 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-03 00:06:47,621 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-03 00:06:47,621 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-03 00:06:47,622 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-03 00:06:47,624 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-03 00:06:47,625 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-03 00:06:47,627 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-03 00:06:47,628 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-03 00:06:47,630 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-03 00:06:47,633 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-03 00:06:47,634 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-03 00:06:47,635 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-03 00:06:47,636 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-03 00:06:47,637 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-03 00:06:47,642 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-03 00:06:47,642 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-03 00:06:47,642 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-03 00:06:47,643 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-03 00:06:47,643 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-03 00:06:47,644 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-03 00:06:47,644 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-03 00:06:47,644 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-03 00:06:47,653 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-03 00:06:47,653 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-03 00:06:47,654 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-03 00:06:47,654 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-03 00:06:47,655 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-03 00:06:47,655 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-03 00:06:47,655 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-03 00:06:47,655 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-03 00:06:47,656 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-03 00:06:47,657 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-03 00:06:47,669 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 00:06:47,669 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 00:06:47,671 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 00:06:47,671 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 00:06:47,671 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 00:06:47,671 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 00:06:47,672 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 00:06:47,672 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 00:06:47,672 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 00:06:47,672 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 00:06:47,672 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 00:06:47,673 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 00:06:47,673 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 00:06:47,673 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 00:06:47,673 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 00:06:47,673 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 00:06:47,673 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 00:06:47,673 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 00:06:47,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 00:06:47,674 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 00:06:47,674 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-03 00:06:47,674 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 00:06:47,674 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-03 00:06:47,674 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-03 00:06:47,925 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 00:06:47,945 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 00:06:47,947 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 00:06:47,948 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-03 00:06:47,949 INFO L275 PluginConnector]: CDTParser initialized [2021-05-03 00:06:47,949 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_13.c [2021-05-03 00:06:47,996 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/150fa341c/603c7665c62a4d2288958f0672d96090/FLAG19c5f0b7a [2021-05-03 00:06:48,356 INFO L306 CDTParser]: Found 1 translation units. [2021-05-03 00:06:48,357 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_13.c [2021-05-03 00:06:48,361 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/150fa341c/603c7665c62a4d2288958f0672d96090/FLAG19c5f0b7a [2021-05-03 00:06:48,782 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/150fa341c/603c7665c62a4d2288958f0672d96090 [2021-05-03 00:06:48,784 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 00:06:48,785 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 00:06:48,789 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-03 00:06:48,789 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-03 00:06:48,792 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-03 00:06:48,792 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.05 12:06:48" (1/1) ... [2021-05-03 00:06:48,793 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27af7794 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:06:48, skipping insertion in model container [2021-05-03 00:06:48,793 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.05 12:06:48" (1/1) ... [2021-05-03 00:06:48,797 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-03 00:06:48,805 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-03 00:06:48,886 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_13.c[319,332] [2021-05-03 00:06:48,895 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-03 00:06:48,900 INFO L203 MainTranslator]: Completed pre-run [2021-05-03 00:06:48,927 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_13.c[319,332] [2021-05-03 00:06:48,932 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-03 00:06:48,942 INFO L208 MainTranslator]: Completed translation [2021-05-03 00:06:48,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:06:48 WrapperNode [2021-05-03 00:06:48,943 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-03 00:06:48,944 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 00:06:48,944 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 00:06:48,944 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 00:06:48,951 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:06:48" (1/1) ... [2021-05-03 00:06:48,951 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:06:48" (1/1) ... [2021-05-03 00:06:48,955 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:06:48" (1/1) ... [2021-05-03 00:06:48,955 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:06:48" (1/1) ... [2021-05-03 00:06:48,967 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:06:48" (1/1) ... [2021-05-03 00:06:48,971 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:06:48" (1/1) ... [2021-05-03 00:06:48,973 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:06:48" (1/1) ... [2021-05-03 00:06:48,977 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 00:06:48,978 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 00:06:48,978 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 00:06:48,978 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 00:06:48,978 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:06:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 00:06:49,031 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-03 00:06:49,031 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 00:06:49,031 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-03 00:06:49,031 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-03 00:06:49,031 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-03 00:06:49,032 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-03 00:06:49,032 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-03 00:06:49,032 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-03 00:06:49,032 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-03 00:06:49,032 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-03 00:06:49,032 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-03 00:06:49,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-03 00:06:49,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-03 00:06:49,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 00:06:49,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-03 00:06:49,033 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-03 00:06:49,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-03 00:06:49,251 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 00:06:49,252 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-03 00:06:49,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 12:06:49 BoogieIcfgContainer [2021-05-03 00:06:49,253 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 00:06:49,254 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 00:06:49,254 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 00:06:49,255 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 00:06:49,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.05 12:06:48" (1/3) ... [2021-05-03 00:06:49,256 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75c6347f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 12:06:49, skipping insertion in model container [2021-05-03 00:06:49,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:06:48" (2/3) ... [2021-05-03 00:06:49,256 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75c6347f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 12:06:49, skipping insertion in model container [2021-05-03 00:06:49,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 12:06:49" (3/3) ... [2021-05-03 00:06:49,257 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_13.c [2021-05-03 00:06:49,261 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-03 00:06:49,263 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 00:06:49,273 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-03 00:06:49,302 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 00:06:49,302 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 00:06:49,302 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-03 00:06:49,302 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 00:06:49,302 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 00:06:49,302 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 00:06:49,303 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 00:06:49,303 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 00:06:49,311 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:06:49,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-03 00:06:49,316 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:06:49,316 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:06:49,316 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:06:49,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:06:49,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1168619535, now seen corresponding path program 1 times [2021-05-03 00:06:49,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:06:49,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [404382607] [2021-05-03 00:06:49,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:06:49,376 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:06:49,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:06:49,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:06:49,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:06:49,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:06:49,472 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:06:49,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [404382607] [2021-05-03 00:06:49,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [404382607] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:06:49,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:06:49,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 00:06:49,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669815938] [2021-05-03 00:06:49,477 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-03 00:06:49,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:06:49,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-03 00:06:49,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 00:06:49,487 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:06:49,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:06:49,534 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2021-05-03 00:06:49,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 00:06:49,536 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-03 00:06:49,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:06:49,541 INFO L225 Difference]: With dead ends: 34 [2021-05-03 00:06:49,541 INFO L226 Difference]: Without dead ends: 14 [2021-05-03 00:06:49,544 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 00:06:49,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-05-03 00:06:49,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-05-03 00:06:49,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:06:49,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-05-03 00:06:49,567 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 12 [2021-05-03 00:06:49,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:06:49,567 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-05-03 00:06:49,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:06:49,568 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-05-03 00:06:49,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-03 00:06:49,568 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:06:49,568 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:06:49,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 00:06:49,568 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:06:49,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:06:49,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1458605129, now seen corresponding path program 1 times [2021-05-03 00:06:49,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:06:49,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1131676335] [2021-05-03 00:06:49,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:06:49,574 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:06:49,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:06:49,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:06:49,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:06:49,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:06:49,669 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:06:49,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1131676335] [2021-05-03 00:06:49,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1131676335] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:06:49,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:06:49,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 00:06:49,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716222301] [2021-05-03 00:06:49,693 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 00:06:49,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:06:49,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 00:06:49,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 00:06:49,694 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:06:49,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:06:49,747 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2021-05-03 00:06:49,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 00:06:49,747 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-03 00:06:49,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:06:49,748 INFO L225 Difference]: With dead ends: 24 [2021-05-03 00:06:49,748 INFO L226 Difference]: Without dead ends: 16 [2021-05-03 00:06:49,749 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 00:06:49,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-05-03 00:06:49,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-05-03 00:06:49,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:06:49,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-05-03 00:06:49,753 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2021-05-03 00:06:49,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:06:49,754 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-05-03 00:06:49,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:06:49,754 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-05-03 00:06:49,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 00:06:49,754 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:06:49,754 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:06:49,754 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-03 00:06:49,754 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:06:49,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:06:49,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1316432198, now seen corresponding path program 1 times [2021-05-03 00:06:49,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:06:49,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [950734833] [2021-05-03 00:06:49,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:06:49,786 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_14 50000) InVars {main_~x~0=v_main_~x~0_14} OutVars{main_~x~0=v_main_~x~0_14} AuxVars[] AssignedVars[] [2021-05-03 00:06:49,804 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-03 00:06:49,806 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:49,823 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:06:49,840 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-03 00:06:49,852 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:06:49,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:06:49,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:06:49,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:06:49,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:06:49,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:06:49,949 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:06:49,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [950734833] [2021-05-03 00:06:49,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [950734833] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:06:49,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:06:49,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-03 00:06:49,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694040285] [2021-05-03 00:06:49,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 00:06:49,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:06:49,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 00:06:49,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-03 00:06:49,950 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:06:50,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:06:50,060 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2021-05-03 00:06:50,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 00:06:50,060 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-05-03 00:06:50,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:06:50,061 INFO L225 Difference]: With dead ends: 26 [2021-05-03 00:06:50,061 INFO L226 Difference]: Without dead ends: 20 [2021-05-03 00:06:50,061 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 97.7ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-03 00:06:50,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-03 00:06:50,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-05-03 00:06:50,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:06:50,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-05-03 00:06:50,066 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2021-05-03 00:06:50,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:06:50,066 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-05-03 00:06:50,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:06:50,066 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-05-03 00:06:50,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 00:06:50,067 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:06:50,067 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:06:50,067 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-03 00:06:50,067 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:06:50,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:06:50,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1342594849, now seen corresponding path program 1 times [2021-05-03 00:06:50,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:06:50,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1607443538] [2021-05-03 00:06:50,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:06:50,074 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_18 50000) InVars {main_~x~0=v_main_~x~0_18} OutVars{main_~x~0=v_main_~x~0_18} AuxVars[] AssignedVars[] [2021-05-03 00:06:50,089 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-03 00:06:50,092 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:50,098 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:06:50,119 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-03 00:06:50,145 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50000 v_main_~x~0_20) (< v_main_~x~0_20 1000000)) InVars {main_~x~0=v_main_~x~0_20} OutVars{main_~x~0=v_main_~x~0_20} AuxVars[] AssignedVars[] [2021-05-03 00:06:50,160 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:06:50,165 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:50,177 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:50,202 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:06:50,207 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:06:50,269 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:06:50,289 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:06:50,292 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_22 999998) (<= 50000 v_main_~x~0_22)) InVars {main_~x~0=v_main_~x~0_22} OutVars{main_~x~0=v_main_~x~0_22} AuxVars[] AssignedVars[] [2021-05-03 00:06:50,310 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:06:50,329 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:50,335 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:50,351 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:06:50,353 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:06:50,374 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:06:50,402 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_24 50000) (< v_main_~x~0_24 999999)) InVars {main_~x~0=v_main_~x~0_24} OutVars{main_~x~0=v_main_~x~0_24} AuxVars[] AssignedVars[] [2021-05-03 00:06:50,407 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size [2021-05-03 00:06:50,419 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:50,425 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:06:50,432 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size 47 [2021-05-03 00:06:50,447 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:06:50,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:06:50,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:06:50,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:06:50,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:06:50,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:06:50,698 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:06:50,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1607443538] [2021-05-03 00:06:50,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1607443538] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:06:50,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:06:50,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 00:06:50,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991484251] [2021-05-03 00:06:50,699 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 00:06:50,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:06:50,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 00:06:50,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-03 00:06:50,699 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:06:50,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:06:50,825 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2021-05-03 00:06:50,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 00:06:50,826 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-05-03 00:06:50,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:06:50,826 INFO L225 Difference]: With dead ends: 35 [2021-05-03 00:06:50,826 INFO L226 Difference]: Without dead ends: 23 [2021-05-03 00:06:50,827 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 170.2ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-05-03 00:06:50,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-03 00:06:50,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-03 00:06:50,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:06:50,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-05-03 00:06:50,831 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 19 [2021-05-03 00:06:50,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:06:50,831 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-05-03 00:06:50,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:06:50,831 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-05-03 00:06:50,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 00:06:50,832 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:06:50,832 INFO L523 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:06:50,832 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-03 00:06:50,832 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:06:50,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:06:50,832 INFO L82 PathProgramCache]: Analyzing trace with hash 76312167, now seen corresponding path program 2 times [2021-05-03 00:06:50,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:06:50,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1812097447] [2021-05-03 00:06:50,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:06:50,838 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_30 50000) InVars {main_~x~0=v_main_~x~0_30} OutVars{main_~x~0=v_main_~x~0_30} AuxVars[] AssignedVars[] [2021-05-03 00:06:50,841 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-03 00:06:50,848 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:50,853 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:06:50,868 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-03 00:06:50,883 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50000 v_main_~x~0_32) (< v_main_~x~0_32 1000000)) InVars {main_~x~0=v_main_~x~0_32} OutVars{main_~x~0=v_main_~x~0_32} AuxVars[] AssignedVars[] [2021-05-03 00:06:50,886 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:06:50,897 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:50,901 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:50,913 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:06:50,916 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:06:50,938 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:06:50,964 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:06:50,967 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50000 v_main_~x~0_34) (< v_main_~x~0_34 999998)) InVars {main_~x~0=v_main_~x~0_34} OutVars{main_~x~0=v_main_~x~0_34} AuxVars[] AssignedVars[] [2021-05-03 00:06:50,969 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:06:50,971 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:50,973 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:50,982 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:06:50,984 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:06:51,012 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:06:51,044 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_36 50000) (< v_main_~x~0_36 999999)) InVars {main_~x~0=v_main_~x~0_36} OutVars{main_~x~0=v_main_~x~0_36} AuxVars[] AssignedVars[] [2021-05-03 00:06:51,048 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size [2021-05-03 00:06:51,055 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:51,060 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:06:51,066 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size 47 [2021-05-03 00:06:51,077 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:06:51,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:06:51,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:06:51,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:06:51,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:06:51,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:06:51,237 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:06:51,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1812097447] [2021-05-03 00:06:51,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1812097447] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:06:51,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:06:51,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-03 00:06:51,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133490104] [2021-05-03 00:06:51,238 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 00:06:51,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:06:51,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 00:06:51,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-05-03 00:06:51,240 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:06:51,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:06:51,375 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2021-05-03 00:06:51,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 00:06:51,376 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-05-03 00:06:51,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:06:51,377 INFO L225 Difference]: With dead ends: 38 [2021-05-03 00:06:51,377 INFO L226 Difference]: Without dead ends: 25 [2021-05-03 00:06:51,377 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 156.4ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-05-03 00:06:51,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-03 00:06:51,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-03 00:06:51,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:06:51,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-05-03 00:06:51,387 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 22 [2021-05-03 00:06:51,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:06:51,387 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-05-03 00:06:51,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:06:51,387 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-05-03 00:06:51,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 00:06:51,388 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:06:51,388 INFO L523 BasicCegarLoop]: trace histogram [5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:06:51,388 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-03 00:06:51,388 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:06:51,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:06:51,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1181472342, now seen corresponding path program 3 times [2021-05-03 00:06:51,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:06:51,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1844480556] [2021-05-03 00:06:51,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:06:51,396 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_43 50000) InVars {main_~x~0=v_main_~x~0_43} OutVars{main_~x~0=v_main_~x~0_43} AuxVars[] AssignedVars[] [2021-05-03 00:06:51,398 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-03 00:06:51,408 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:51,414 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:06:51,422 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-03 00:06:51,436 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_45 1000000) (<= 50000 v_main_~x~0_45)) InVars {main_~x~0=v_main_~x~0_45} OutVars{main_~x~0=v_main_~x~0_45} AuxVars[] AssignedVars[] [2021-05-03 00:06:51,440 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:06:51,441 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:51,446 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:51,457 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:06:51,459 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:06:51,489 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:06:51,520 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:06:51,522 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50000 v_main_~x~0_47) (< v_main_~x~0_47 999998)) InVars {main_~x~0=v_main_~x~0_47} OutVars{main_~x~0=v_main_~x~0_47} AuxVars[] AssignedVars[] [2021-05-03 00:06:51,524 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:06:51,535 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:51,537 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:51,546 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:06:51,548 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:06:51,564 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:06:51,585 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_49 999999) (< v_main_~x~0_49 50000)) InVars {main_~x~0=v_main_~x~0_49} OutVars{main_~x~0=v_main_~x~0_49} AuxVars[] AssignedVars[] [2021-05-03 00:06:51,586 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size [2021-05-03 00:06:51,593 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:51,597 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:06:51,602 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size 47 [2021-05-03 00:06:51,611 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:06:51,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:06:51,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:06:51,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:06:51,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:06:51,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:06:51,781 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:06:51,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1844480556] [2021-05-03 00:06:51,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1844480556] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:06:51,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:06:51,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-03 00:06:51,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427047056] [2021-05-03 00:06:51,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 00:06:51,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:06:51,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 00:06:51,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-05-03 00:06:51,783 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:06:51,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:06:51,942 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2021-05-03 00:06:51,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 00:06:51,942 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-05-03 00:06:51,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:06:51,943 INFO L225 Difference]: With dead ends: 40 [2021-05-03 00:06:51,943 INFO L226 Difference]: Without dead ends: 27 [2021-05-03 00:06:51,943 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 193.7ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-05-03 00:06:51,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-03 00:06:51,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-03 00:06:51,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:06:51,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-05-03 00:06:51,947 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 24 [2021-05-03 00:06:51,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:06:51,947 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-05-03 00:06:51,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:06:51,947 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-05-03 00:06:51,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 00:06:51,948 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:06:51,948 INFO L523 BasicCegarLoop]: trace histogram [6, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:06:51,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-03 00:06:51,948 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:06:51,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:06:51,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1268391981, now seen corresponding path program 4 times [2021-05-03 00:06:51,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:06:51,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [893571853] [2021-05-03 00:06:51,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:06:51,954 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_57 50000) InVars {main_~x~0=v_main_~x~0_57} OutVars{main_~x~0=v_main_~x~0_57} AuxVars[] AssignedVars[] [2021-05-03 00:06:51,956 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-03 00:06:51,956 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:51,961 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:06:51,977 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-03 00:06:51,992 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_59 1000000) (<= 50000 v_main_~x~0_59)) InVars {main_~x~0=v_main_~x~0_59} OutVars{main_~x~0=v_main_~x~0_59} AuxVars[] AssignedVars[] [2021-05-03 00:06:51,994 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:06:52,006 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:52,009 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:52,018 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:06:52,022 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:06:52,040 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:06:52,058 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:06:52,063 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50000 v_main_~x~0_61) (< v_main_~x~0_61 999998)) InVars {main_~x~0=v_main_~x~0_61} OutVars{main_~x~0=v_main_~x~0_61} AuxVars[] AssignedVars[] [2021-05-03 00:06:52,066 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:06:52,077 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:52,079 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:52,087 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:06:52,089 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:06:52,118 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:06:52,166 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_63 999999) (< v_main_~x~0_63 50000)) InVars {main_~x~0=v_main_~x~0_63} OutVars{main_~x~0=v_main_~x~0_63} AuxVars[] AssignedVars[] [2021-05-03 00:06:52,167 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size [2021-05-03 00:06:52,168 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:52,172 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:06:52,184 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size 47 [2021-05-03 00:06:52,193 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:06:52,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:06:52,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:06:52,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:06:52,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:06:52,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:06:52,381 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:06:52,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [893571853] [2021-05-03 00:06:52,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [893571853] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:06:52,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:06:52,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-03 00:06:52,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233966204] [2021-05-03 00:06:52,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 00:06:52,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:06:52,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 00:06:52,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-05-03 00:06:52,383 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:06:52,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:06:52,584 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2021-05-03 00:06:52,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 00:06:52,585 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-05-03 00:06:52,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:06:52,587 INFO L225 Difference]: With dead ends: 42 [2021-05-03 00:06:52,587 INFO L226 Difference]: Without dead ends: 29 [2021-05-03 00:06:52,590 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 219.5ms TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-05-03 00:06:52,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-03 00:06:52,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-03 00:06:52,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:06:52,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2021-05-03 00:06:52,597 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 26 [2021-05-03 00:06:52,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:06:52,597 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2021-05-03 00:06:52,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:06:52,598 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2021-05-03 00:06:52,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 00:06:52,598 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:06:52,598 INFO L523 BasicCegarLoop]: trace histogram [7, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:06:52,598 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-03 00:06:52,598 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:06:52,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:06:52,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1945928176, now seen corresponding path program 5 times [2021-05-03 00:06:52,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:06:52,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [910519579] [2021-05-03 00:06:52,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:06:52,604 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_72 50000) InVars {main_~x~0=v_main_~x~0_72} OutVars{main_~x~0=v_main_~x~0_72} AuxVars[] AssignedVars[] [2021-05-03 00:06:52,606 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-03 00:06:52,612 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:52,617 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:06:52,623 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-03 00:06:52,634 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_74 1000000) (<= 50000 v_main_~x~0_74)) InVars {main_~x~0=v_main_~x~0_74} OutVars{main_~x~0=v_main_~x~0_74} AuxVars[] AssignedVars[] [2021-05-03 00:06:52,636 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:06:52,646 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:52,647 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:52,655 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:06:52,657 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:06:52,673 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:06:52,702 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:06:52,704 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_76 999998) (<= 50000 v_main_~x~0_76)) InVars {main_~x~0=v_main_~x~0_76} OutVars{main_~x~0=v_main_~x~0_76} AuxVars[] AssignedVars[] [2021-05-03 00:06:52,706 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:06:52,715 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:52,717 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:52,726 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:06:52,728 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:06:52,743 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:06:52,762 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_78 999999) (< v_main_~x~0_78 50000)) InVars {main_~x~0=v_main_~x~0_78} OutVars{main_~x~0=v_main_~x~0_78} AuxVars[] AssignedVars[] [2021-05-03 00:06:52,764 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size [2021-05-03 00:06:52,764 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:52,768 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:06:52,788 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size 47 [2021-05-03 00:06:52,798 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:06:52,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:06:52,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:06:52,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:06:52,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:06:52,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:06:52,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:06:52,932 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:06:52,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [910519579] [2021-05-03 00:06:52,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [910519579] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:06:52,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:06:52,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-03 00:06:52,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010613202] [2021-05-03 00:06:52,933 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 00:06:52,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:06:52,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 00:06:52,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-05-03 00:06:52,933 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:06:53,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:06:53,170 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2021-05-03 00:06:53,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 00:06:53,171 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 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 28 [2021-05-03 00:06:53,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:06:53,171 INFO L225 Difference]: With dead ends: 48 [2021-05-03 00:06:53,171 INFO L226 Difference]: Without dead ends: 35 [2021-05-03 00:06:53,172 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 235.4ms TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2021-05-03 00:06:53,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-03 00:06:53,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-03 00:06:53,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:06:53,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2021-05-03 00:06:53,176 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 28 [2021-05-03 00:06:53,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:06:53,176 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2021-05-03 00:06:53,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:06:53,176 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2021-05-03 00:06:53,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 00:06:53,176 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:06:53,177 INFO L523 BasicCegarLoop]: trace histogram [9, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:06:53,177 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-05-03 00:06:53,177 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:06:53,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:06:53,177 INFO L82 PathProgramCache]: Analyzing trace with hash -412004710, now seen corresponding path program 6 times [2021-05-03 00:06:53,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:06:53,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1743259439] [2021-05-03 00:06:53,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:06:53,182 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_89 50000) InVars {main_~x~0=v_main_~x~0_89} OutVars{main_~x~0=v_main_~x~0_89} AuxVars[] AssignedVars[] [2021-05-03 00:06:53,183 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-03 00:06:53,184 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:53,188 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:06:53,198 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-03 00:06:53,208 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50000 v_main_~x~0_91) (< v_main_~x~0_91 1000000)) InVars {main_~x~0=v_main_~x~0_91} OutVars{main_~x~0=v_main_~x~0_91} AuxVars[] AssignedVars[] [2021-05-03 00:06:53,210 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:06:53,219 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:53,221 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:53,229 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:06:53,231 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:06:53,245 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:06:53,262 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:06:53,264 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50000 v_main_~x~0_93) (< v_main_~x~0_93 999998)) InVars {main_~x~0=v_main_~x~0_93} OutVars{main_~x~0=v_main_~x~0_93} AuxVars[] AssignedVars[] [2021-05-03 00:06:53,265 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:06:53,275 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:53,276 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:53,284 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:06:53,286 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:06:53,300 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:06:53,319 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_95 999999) (< v_main_~x~0_95 50000)) InVars {main_~x~0=v_main_~x~0_95} OutVars{main_~x~0=v_main_~x~0_95} AuxVars[] AssignedVars[] [2021-05-03 00:06:53,328 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size [2021-05-03 00:06:53,336 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:53,341 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:06:53,347 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size 47 [2021-05-03 00:06:53,358 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:06:53,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:06:53,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:06:53,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:06:53,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:06:53,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:06:53,631 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:06:53,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1743259439] [2021-05-03 00:06:53,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1743259439] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:06:53,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:06:53,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-05-03 00:06:53,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263794186] [2021-05-03 00:06:53,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 00:06:53,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:06:53,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 00:06:53,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-05-03 00:06:53,633 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:06:53,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:06:53,924 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2021-05-03 00:06:53,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 00:06:53,925 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2021-05-03 00:06:53,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:06:53,927 INFO L225 Difference]: With dead ends: 56 [2021-05-03 00:06:53,927 INFO L226 Difference]: Without dead ends: 37 [2021-05-03 00:06:53,927 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 333.5ms TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-05-03 00:06:53,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-03 00:06:53,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-03 00:06:53,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:06:53,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2021-05-03 00:06:53,936 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 34 [2021-05-03 00:06:53,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:06:53,937 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2021-05-03 00:06:53,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:06:53,937 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2021-05-03 00:06:53,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 00:06:53,937 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:06:53,938 INFO L523 BasicCegarLoop]: trace histogram [10, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:06:53,938 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-05-03 00:06:53,938 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:06:53,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:06:53,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1812151645, now seen corresponding path program 7 times [2021-05-03 00:06:53,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:06:53,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1250794115] [2021-05-03 00:06:53,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:06:53,944 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_105 50000) InVars {main_~x~0=v_main_~x~0_105} OutVars{main_~x~0=v_main_~x~0_105} AuxVars[] AssignedVars[] [2021-05-03 00:06:53,945 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-03 00:06:53,951 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:53,955 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:06:53,961 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-03 00:06:53,972 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_107 1000000) (<= 50000 v_main_~x~0_107)) InVars {main_~x~0=v_main_~x~0_107} OutVars{main_~x~0=v_main_~x~0_107} AuxVars[] AssignedVars[] [2021-05-03 00:06:53,977 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:06:53,978 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:53,979 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:53,987 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:06:53,989 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:06:54,013 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:06:54,033 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:06:54,040 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50000 v_main_~x~0_109) (< v_main_~x~0_109 999998)) InVars {main_~x~0=v_main_~x~0_109} OutVars{main_~x~0=v_main_~x~0_109} AuxVars[] AssignedVars[] [2021-05-03 00:06:54,042 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:06:54,043 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:54,045 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:54,054 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:06:54,056 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:06:54,079 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:06:54,100 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_111 999999) (< v_main_~x~0_111 50000)) InVars {main_~x~0=v_main_~x~0_111} OutVars{main_~x~0=v_main_~x~0_111} AuxVars[] AssignedVars[] [2021-05-03 00:06:54,101 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size [2021-05-03 00:06:54,108 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:54,112 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:06:54,117 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size 47 [2021-05-03 00:06:54,128 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:06:54,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:06:54,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:06:54,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:06:54,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:06:54,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:06:54,351 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:06:54,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1250794115] [2021-05-03 00:06:54,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1250794115] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:06:54,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:06:54,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-05-03 00:06:54,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794965699] [2021-05-03 00:06:54,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 00:06:54,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:06:54,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 00:06:54,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-05-03 00:06:54,352 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:06:54,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:06:54,711 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2021-05-03 00:06:54,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 00:06:54,712 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-05-03 00:06:54,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:06:54,712 INFO L225 Difference]: With dead ends: 58 [2021-05-03 00:06:54,712 INFO L226 Difference]: Without dead ends: 39 [2021-05-03 00:06:54,713 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 368.0ms TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-05-03 00:06:54,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-03 00:06:54,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-05-03 00:06:54,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:06:54,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2021-05-03 00:06:54,717 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 36 [2021-05-03 00:06:54,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:06:54,717 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2021-05-03 00:06:54,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:06:54,717 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2021-05-03 00:06:54,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-03 00:06:54,717 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:06:54,717 INFO L523 BasicCegarLoop]: trace histogram [11, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:06:54,718 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-05-03 00:06:54,718 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:06:54,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:06:54,718 INFO L82 PathProgramCache]: Analyzing trace with hash 332695392, now seen corresponding path program 8 times [2021-05-03 00:06:54,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:06:54,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [688441908] [2021-05-03 00:06:54,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:06:54,726 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_122 50000) InVars {main_~x~0=v_main_~x~0_122} OutVars{main_~x~0=v_main_~x~0_122} AuxVars[] AssignedVars[] [2021-05-03 00:06:54,729 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-03 00:06:54,729 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:54,734 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:06:54,746 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-03 00:06:54,758 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_124 1000000) (<= 50000 v_main_~x~0_124)) InVars {main_~x~0=v_main_~x~0_124} OutVars{main_~x~0=v_main_~x~0_124} AuxVars[] AssignedVars[] [2021-05-03 00:06:54,760 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:06:54,777 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:54,779 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:54,807 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:06:54,809 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:06:54,830 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:06:54,849 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:06:54,866 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50000 v_main_~x~0_126) (< v_main_~x~0_126 999998)) InVars {main_~x~0=v_main_~x~0_126} OutVars{main_~x~0=v_main_~x~0_126} AuxVars[] AssignedVars[] [2021-05-03 00:06:54,868 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:06:54,877 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:54,879 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:54,887 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:06:54,889 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:06:54,905 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:06:54,929 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_128 50000) (< v_main_~x~0_128 999999)) InVars {main_~x~0=v_main_~x~0_128} OutVars{main_~x~0=v_main_~x~0_128} AuxVars[] AssignedVars[] [2021-05-03 00:06:54,930 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size [2021-05-03 00:06:54,931 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:54,935 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:06:54,951 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size 47 [2021-05-03 00:06:54,960 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:06:54,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:06:55,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:06:55,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:06:55,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:06:55,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:06:55,177 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:06:55,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [688441908] [2021-05-03 00:06:55,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [688441908] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:06:55,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:06:55,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-03 00:06:55,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615172072] [2021-05-03 00:06:55,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 00:06:55,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:06:55,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 00:06:55,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-05-03 00:06:55,178 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:06:55,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:06:55,601 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2021-05-03 00:06:55,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 00:06:55,601 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2021-05-03 00:06:55,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:06:55,602 INFO L225 Difference]: With dead ends: 61 [2021-05-03 00:06:55,602 INFO L226 Difference]: Without dead ends: 42 [2021-05-03 00:06:55,603 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 469.5ms TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930 [2021-05-03 00:06:55,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-03 00:06:55,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-05-03 00:06:55,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 37 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:06:55,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2021-05-03 00:06:55,607 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 38 [2021-05-03 00:06:55,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:06:55,607 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2021-05-03 00:06:55,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:06:55,607 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2021-05-03 00:06:55,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-03 00:06:55,607 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:06:55,607 INFO L523 BasicCegarLoop]: trace histogram [12, 8, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:06:55,608 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-05-03 00:06:55,608 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:06:55,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:06:55,608 INFO L82 PathProgramCache]: Analyzing trace with hash -2062648544, now seen corresponding path program 9 times [2021-05-03 00:06:55,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:06:55,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542516154] [2021-05-03 00:06:55,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:06:55,615 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_140 50000) InVars {main_~x~0=v_main_~x~0_140} OutVars{main_~x~0=v_main_~x~0_140} AuxVars[] AssignedVars[] [2021-05-03 00:06:55,617 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-03 00:06:55,622 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:55,626 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:06:55,631 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-03 00:06:55,641 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50000 v_main_~x~0_142) (< v_main_~x~0_142 1000000)) InVars {main_~x~0=v_main_~x~0_142} OutVars{main_~x~0=v_main_~x~0_142} AuxVars[] AssignedVars[] [2021-05-03 00:06:55,643 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:06:55,644 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:55,645 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:55,658 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:06:55,660 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:06:55,685 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:06:55,707 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:06:55,711 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50000 v_main_~x~0_144) (< v_main_~x~0_144 999998)) InVars {main_~x~0=v_main_~x~0_144} OutVars{main_~x~0=v_main_~x~0_144} AuxVars[] AssignedVars[] [2021-05-03 00:06:55,712 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:06:55,722 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:55,725 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:55,733 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:06:55,736 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:06:55,750 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:06:55,769 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_146 50000) (< v_main_~x~0_146 999999)) InVars {main_~x~0=v_main_~x~0_146} OutVars{main_~x~0=v_main_~x~0_146} AuxVars[] AssignedVars[] [2021-05-03 00:06:55,776 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size [2021-05-03 00:06:55,783 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:55,789 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:06:55,795 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size 47 [2021-05-03 00:06:55,805 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:06:55,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:06:55,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:06:55,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:06:55,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:06:55,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:06:56,140 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:06:56,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542516154] [2021-05-03 00:06:56,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [542516154] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:06:56,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:06:56,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-03 00:06:56,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583093718] [2021-05-03 00:06:56,141 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 00:06:56,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:06:56,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 00:06:56,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-05-03 00:06:56,142 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:06:56,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:06:56,606 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2021-05-03 00:06:56,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 00:06:56,607 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 41 [2021-05-03 00:06:56,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:06:56,607 INFO L225 Difference]: With dead ends: 64 [2021-05-03 00:06:56,607 INFO L226 Difference]: Without dead ends: 44 [2021-05-03 00:06:56,608 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 502.2ms TimeCoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-05-03 00:06:56,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-03 00:06:56,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-05-03 00:06:56,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:06:56,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2021-05-03 00:06:56,612 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 41 [2021-05-03 00:06:56,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:06:56,612 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2021-05-03 00:06:56,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:06:56,612 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2021-05-03 00:06:56,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 00:06:56,613 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:06:56,613 INFO L523 BasicCegarLoop]: trace histogram [13, 9, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:06:56,613 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-05-03 00:06:56,613 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:06:56,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:06:56,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1671035645, now seen corresponding path program 10 times [2021-05-03 00:06:56,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:06:56,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1545123310] [2021-05-03 00:06:56,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:06:56,620 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_159 50000) InVars {main_~x~0=v_main_~x~0_159} OutVars{main_~x~0=v_main_~x~0_159} AuxVars[] AssignedVars[] [2021-05-03 00:06:56,622 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-03 00:06:56,629 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:56,634 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:06:56,640 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-03 00:06:56,650 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_161 1000000) (<= 50000 v_main_~x~0_161)) InVars {main_~x~0=v_main_~x~0_161} OutVars{main_~x~0=v_main_~x~0_161} AuxVars[] AssignedVars[] [2021-05-03 00:06:56,652 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:06:56,661 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:56,663 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:56,674 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:06:56,675 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:06:56,690 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:06:56,707 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:06:56,709 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50000 v_main_~x~0_163) (< v_main_~x~0_163 999998)) InVars {main_~x~0=v_main_~x~0_163} OutVars{main_~x~0=v_main_~x~0_163} AuxVars[] AssignedVars[] [2021-05-03 00:06:56,711 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:06:56,721 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:56,722 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:56,732 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:06:56,734 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:06:56,749 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:06:56,771 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_165 50000) (< v_main_~x~0_165 999999)) InVars {main_~x~0=v_main_~x~0_165} OutVars{main_~x~0=v_main_~x~0_165} AuxVars[] AssignedVars[] [2021-05-03 00:06:56,772 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size [2021-05-03 00:06:56,772 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:56,776 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:06:56,789 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size 47 [2021-05-03 00:06:56,803 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:06:56,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:06:56,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:06:56,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:06:56,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:06:56,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:06:57,113 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:06:57,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1545123310] [2021-05-03 00:06:57,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1545123310] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:06:57,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:06:57,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-05-03 00:06:57,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537216004] [2021-05-03 00:06:57,113 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 00:06:57,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:06:57,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 00:06:57,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-05-03 00:06:57,114 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 18 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:06:57,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:06:57,643 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2021-05-03 00:06:57,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 00:06:57,643 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 18 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 43 [2021-05-03 00:06:57,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:06:57,643 INFO L225 Difference]: With dead ends: 66 [2021-05-03 00:06:57,643 INFO L226 Difference]: Without dead ends: 46 [2021-05-03 00:06:57,644 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 525.4ms TimeCoverageRelationStatistics Valid=122, Invalid=870, Unknown=0, NotChecked=0, Total=992 [2021-05-03 00:06:57,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-03 00:06:57,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-05-03 00:06:57,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:06:57,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2021-05-03 00:06:57,649 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 43 [2021-05-03 00:06:57,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:06:57,649 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2021-05-03 00:06:57,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 18 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:06:57,649 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2021-05-03 00:06:57,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-03 00:06:57,649 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:06:57,649 INFO L523 BasicCegarLoop]: trace histogram [14, 10, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:06:57,650 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-05-03 00:06:57,650 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:06:57,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:06:57,650 INFO L82 PathProgramCache]: Analyzing trace with hash -851118182, now seen corresponding path program 11 times [2021-05-03 00:06:57,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:06:57,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1204534308] [2021-05-03 00:06:57,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:06:57,654 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_179 50000) InVars {main_~x~0=v_main_~x~0_179} OutVars{main_~x~0=v_main_~x~0_179} AuxVars[] AssignedVars[] [2021-05-03 00:06:57,655 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-03 00:06:57,656 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:57,659 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:06:57,669 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-03 00:06:57,681 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_181 1000000) (<= 50000 v_main_~x~0_181)) InVars {main_~x~0=v_main_~x~0_181} OutVars{main_~x~0=v_main_~x~0_181} AuxVars[] AssignedVars[] [2021-05-03 00:06:57,684 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:06:57,685 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:57,686 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:57,693 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:06:57,695 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:06:57,728 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:06:57,745 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:06:57,747 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_183 999998) (<= 50000 v_main_~x~0_183)) InVars {main_~x~0=v_main_~x~0_183} OutVars{main_~x~0=v_main_~x~0_183} AuxVars[] AssignedVars[] [2021-05-03 00:06:57,748 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:06:57,749 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:57,751 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:57,758 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:06:57,760 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:06:57,791 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:06:57,809 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_185 999999) (< v_main_~x~0_185 50000)) InVars {main_~x~0=v_main_~x~0_185} OutVars{main_~x~0=v_main_~x~0_185} AuxVars[] AssignedVars[] [2021-05-03 00:06:57,812 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size [2021-05-03 00:06:57,812 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:57,816 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:06:57,826 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size 47 [2021-05-03 00:06:57,834 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:06:57,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:06:57,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:06:57,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:06:57,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:06:57,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:06:58,137 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:06:58,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1204534308] [2021-05-03 00:06:58,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1204534308] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:06:58,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:06:58,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-05-03 00:06:58,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523691148] [2021-05-03 00:06:58,137 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 00:06:58,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:06:58,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 00:06:58,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=320, Unknown=0, NotChecked=0, Total=462 [2021-05-03 00:06:58,138 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:06:58,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:06:58,745 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2021-05-03 00:06:58,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 00:06:58,745 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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 45 [2021-05-03 00:06:58,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:06:58,745 INFO L225 Difference]: With dead ends: 69 [2021-05-03 00:06:58,745 INFO L226 Difference]: Without dead ends: 49 [2021-05-03 00:06:58,746 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 626.6ms TimeCoverageRelationStatistics Valid=384, Invalid=1098, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 00:06:58,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-03 00:06:58,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-05-03 00:06:58,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 44 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:06:58,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2021-05-03 00:06:58,750 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 45 [2021-05-03 00:06:58,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:06:58,750 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2021-05-03 00:06:58,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:06:58,750 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2021-05-03 00:06:58,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-03 00:06:58,751 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:06:58,751 INFO L523 BasicCegarLoop]: trace histogram [15, 11, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:06:58,751 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-05-03 00:06:58,751 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:06:58,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:06:58,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1906106036, now seen corresponding path program 12 times [2021-05-03 00:06:58,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:06:58,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [195763750] [2021-05-03 00:06:58,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:06:58,758 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_200 50000) InVars {main_~x~0=v_main_~x~0_200} OutVars{main_~x~0=v_main_~x~0_200} AuxVars[] AssignedVars[] [2021-05-03 00:06:58,759 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-03 00:06:58,765 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:58,769 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:06:58,774 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-03 00:06:58,784 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50000 v_main_~x~0_202) (< v_main_~x~0_202 1000000)) InVars {main_~x~0=v_main_~x~0_202} OutVars{main_~x~0=v_main_~x~0_202} AuxVars[] AssignedVars[] [2021-05-03 00:06:58,785 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:06:58,794 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:58,796 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:58,810 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:06:58,812 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:06:58,827 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:06:58,844 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:06:58,846 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_204 999998) (<= 50000 v_main_~x~0_204)) InVars {main_~x~0=v_main_~x~0_204} OutVars{main_~x~0=v_main_~x~0_204} AuxVars[] AssignedVars[] [2021-05-03 00:06:58,847 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:06:58,848 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:58,850 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:58,866 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:06:58,868 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:06:58,892 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:06:58,911 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_206 50000) (< v_main_~x~0_206 999999)) InVars {main_~x~0=v_main_~x~0_206} OutVars{main_~x~0=v_main_~x~0_206} AuxVars[] AssignedVars[] [2021-05-03 00:06:58,912 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size [2021-05-03 00:06:58,913 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:58,917 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:06:58,930 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size 47 [2021-05-03 00:06:58,941 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:06:58,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:06:59,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:06:59,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:06:59,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:06:59,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:06:59,277 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:06:59,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [195763750] [2021-05-03 00:06:59,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [195763750] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:06:59,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:06:59,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-03 00:06:59,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636013461] [2021-05-03 00:06:59,278 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 00:06:59,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:06:59,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 00:06:59,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-05-03 00:06:59,278 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 21 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:06:59,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:06:59,900 INFO L93 Difference]: Finished difference Result 72 states and 79 transitions. [2021-05-03 00:06:59,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 00:06:59,901 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 21 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2021-05-03 00:06:59,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:06:59,901 INFO L225 Difference]: With dead ends: 72 [2021-05-03 00:06:59,901 INFO L226 Difference]: Without dead ends: 51 [2021-05-03 00:06:59,902 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 631.4ms TimeCoverageRelationStatistics Valid=146, Invalid=1186, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 00:06:59,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-03 00:06:59,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-05-03 00:06:59,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:06:59,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2021-05-03 00:06:59,906 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 48 [2021-05-03 00:06:59,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:06:59,906 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2021-05-03 00:06:59,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 21 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:06:59,906 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2021-05-03 00:06:59,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-03 00:06:59,906 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:06:59,906 INFO L523 BasicCegarLoop]: trace histogram [16, 12, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:06:59,907 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-05-03 00:06:59,907 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:06:59,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:06:59,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1340178737, now seen corresponding path program 13 times [2021-05-03 00:06:59,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:06:59,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [332850061] [2021-05-03 00:06:59,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:06:59,911 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_222 50000) InVars {main_~x~0=v_main_~x~0_222} OutVars{main_~x~0=v_main_~x~0_222} AuxVars[] AssignedVars[] [2021-05-03 00:06:59,912 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-03 00:06:59,913 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:59,916 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:06:59,927 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-03 00:06:59,937 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50000 v_main_~x~0_224) (< v_main_~x~0_224 1000000)) InVars {main_~x~0=v_main_~x~0_224} OutVars{main_~x~0=v_main_~x~0_224} AuxVars[] AssignedVars[] [2021-05-03 00:06:59,939 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:06:59,948 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:59,950 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:59,958 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:06:59,961 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:06:59,977 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:06:59,996 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:06:59,998 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_226 999998) (<= 50000 v_main_~x~0_226)) InVars {main_~x~0=v_main_~x~0_226} OutVars{main_~x~0=v_main_~x~0_226} AuxVars[] AssignedVars[] [2021-05-03 00:07:00,003 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:07:00,004 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:07:00,006 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:07:00,015 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:07:00,017 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:07:00,040 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:07:00,060 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_228 50000) (< v_main_~x~0_228 999999)) InVars {main_~x~0=v_main_~x~0_228} OutVars{main_~x~0=v_main_~x~0_228} AuxVars[] AssignedVars[] [2021-05-03 00:07:00,061 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size [2021-05-03 00:07:00,062 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:07:00,065 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:07:00,077 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size 47 [2021-05-03 00:07:00,086 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:07:00,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:07:00,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:07:00,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:07:00,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:07:00,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:07:04,889 WARN L205 SmtUtils]: Spent 4.65 s on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2021-05-03 00:07:05,093 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 10 [2021-05-03 00:07:06,385 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:07:06,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [332850061] [2021-05-03 00:07:06,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [332850061] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:07:06,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:07:06,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-05-03 00:07:06,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354080096] [2021-05-03 00:07:06,385 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 00:07:06,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:07:06,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 00:07:06,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=418, Unknown=0, NotChecked=0, Total=600 [2021-05-03 00:07:06,386 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:07:06,716 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-03 00:07:07,049 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:07:07,331 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:07:07,615 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:07:07,884 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:07:08,157 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:07:08,895 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:07:09,152 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:07:09,404 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:07:09,682 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:07:09,948 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:07:10,222 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:07:11,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:07:11,297 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2021-05-03 00:07:11,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 00:07:11,298 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-05-03 00:07:11,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:07:11,298 INFO L225 Difference]: With dead ends: 75 [2021-05-03 00:07:11,298 INFO L226 Difference]: Without dead ends: 54 [2021-05-03 00:07:11,299 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 4789.2ms TimeCoverageRelationStatistics Valid=500, Invalid=1480, Unknown=0, NotChecked=0, Total=1980 [2021-05-03 00:07:11,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-03 00:07:11,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-05-03 00:07:11,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:07:11,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2021-05-03 00:07:11,304 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 50 [2021-05-03 00:07:11,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:07:11,304 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2021-05-03 00:07:11,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:07:11,304 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2021-05-03 00:07:11,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-03 00:07:11,304 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:07:11,304 INFO L523 BasicCegarLoop]: trace histogram [17, 13, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:07:11,305 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-05-03 00:07:11,305 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:07:11,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:07:11,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1061769711, now seen corresponding path program 14 times [2021-05-03 00:07:11,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:07:11,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [536019784] [2021-05-03 00:07:11,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:07:11,333 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_245 50000) InVars {main_~x~0=v_main_~x~0_245} OutVars{main_~x~0=v_main_~x~0_245} AuxVars[] AssignedVars[] [2021-05-03 00:07:11,335 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-03 00:07:11,336 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:07:11,355 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:07:11,422 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-03 00:07:11,500 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_247 1000000) (<= 50000 v_main_~x~0_247)) InVars {main_~x~0=v_main_~x~0_247} OutVars{main_~x~0=v_main_~x~0_247} AuxVars[] AssignedVars[] [2021-05-03 00:07:11,502 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:07:11,545 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:07:11,548 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:07:11,572 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:07:11,580 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:07:11,648 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:07:11,749 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 00:07:11,750 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:07:11,755 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50000 v_main_~x~0_249) (< v_main_~x~0_249 999998)) InVars {main_~x~0=v_main_~x~0_249} OutVars{main_~x~0=v_main_~x~0_249} AuxVars[] AssignedVars[] [2021-05-03 00:07:11,757 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:07:11,795 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:07:11,798 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:07:11,822 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:07:11,830 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:07:11,893 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:07:12,013 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-05-03 00:07:12,021 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_251 50000) (< v_main_~x~0_251 999999)) InVars {main_~x~0=v_main_~x~0_251} OutVars{main_~x~0=v_main_~x~0_251} AuxVars[] AssignedVars[] [2021-05-03 00:07:12,022 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size [2021-05-03 00:07:12,023 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:07:12,041 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:07:12,111 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size 47 [2021-05-03 00:07:12,182 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:07:12,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:07:12,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:07:12,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:07:12,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:07:12,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:07:13,125 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 14 [2021-05-03 00:07:15,231 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:07:15,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [536019784] [2021-05-03 00:07:15,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [536019784] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:07:15,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:07:15,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-05-03 00:07:15,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337312242] [2021-05-03 00:07:15,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 00:07:15,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:07:15,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 00:07:15,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-05-03 00:07:15,233 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:07:15,660 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-03 00:07:16,019 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:07:16,403 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:07:16,758 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:07:17,138 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:07:17,524 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:07:17,932 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:07:18,316 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:07:18,704 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:07:19,390 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:07:19,775 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:07:20,478 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:07:21,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:07:21,208 INFO L93 Difference]: Finished difference Result 78 states and 85 transitions. [2021-05-03 00:07:21,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 00:07:21,208 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 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 53 [2021-05-03 00:07:21,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:07:21,209 INFO L225 Difference]: With dead ends: 78 [2021-05-03 00:07:21,209 INFO L226 Difference]: Without dead ends: 56 [2021-05-03 00:07:21,210 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 5794.0ms TimeCoverageRelationStatistics Valid=171, Invalid=1551, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 00:07:21,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-03 00:07:21,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-03 00:07:21,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 51 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:07:21,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2021-05-03 00:07:21,214 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 53 [2021-05-03 00:07:21,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:07:21,214 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2021-05-03 00:07:21,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:07:21,214 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2021-05-03 00:07:21,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-03 00:07:21,215 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:07:21,215 INFO L523 BasicCegarLoop]: trace histogram [18, 14, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:07:21,215 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-05-03 00:07:21,215 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:07:21,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:07:21,215 INFO L82 PathProgramCache]: Analyzing trace with hash 236472942, now seen corresponding path program 15 times [2021-05-03 00:07:21,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:07:21,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2024664159] [2021-05-03 00:07:21,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:07:21,239 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_269 50000) InVars {main_~x~0=v_main_~x~0_269} OutVars{main_~x~0=v_main_~x~0_269} AuxVars[] AssignedVars[] [2021-05-03 00:07:21,241 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-03 00:07:21,272 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:07:21,289 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:07:21,316 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-03 00:07:21,388 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50000 v_main_~x~0_271) (< v_main_~x~0_271 1000000)) InVars {main_~x~0=v_main_~x~0_271} OutVars{main_~x~0=v_main_~x~0_271} AuxVars[] AssignedVars[] [2021-05-03 00:07:21,390 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:07:21,391 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:07:21,392 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:07:21,413 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:07:21,422 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:07:21,517 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:07:21,626 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-05-03 00:07:21,627 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:07:21,637 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_273 999998) (<= 50000 v_main_~x~0_273)) InVars {main_~x~0=v_main_~x~0_273} OutVars{main_~x~0=v_main_~x~0_273} AuxVars[] AssignedVars[] [2021-05-03 00:07:21,639 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:07:21,681 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:07:21,686 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:07:21,712 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:07:21,722 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:07:21,789 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:07:21,907 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:07:21,922 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_275 50000) (< v_main_~x~0_275 999999)) InVars {main_~x~0=v_main_~x~0_275} OutVars{main_~x~0=v_main_~x~0_275} AuxVars[] AssignedVars[] [2021-05-03 00:07:21,923 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size [2021-05-03 00:07:21,924 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:07:21,941 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:07:22,012 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size 47 [2021-05-03 00:07:22,091 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:07:22,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:07:22,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:07:22,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:07:22,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:07:22,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:07:22,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:07:23,188 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:07:23,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2024664159] [2021-05-03 00:07:23,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2024664159] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:07:23,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:07:23,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-03 00:07:23,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537742125] [2021-05-03 00:07:23,189 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 00:07:23,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:07:23,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 00:07:23,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=160, Unknown=0, NotChecked=0, Total=272 [2021-05-03 00:07:23,189 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:07:23,384 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:07:23,588 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:07:23,789 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:07:23,973 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:07:24,166 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:07:24,350 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:07:24,482 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:07:24,624 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:07:24,764 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:07:25,031 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:07:25,176 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:07:25,326 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:07:25,476 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:07:25,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:07:25,628 INFO L93 Difference]: Finished difference Result 83 states and 94 transitions. [2021-05-03 00:07:25,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 00:07:25,628 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2021-05-03 00:07:25,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:07:25,629 INFO L225 Difference]: With dead ends: 83 [2021-05-03 00:07:25,629 INFO L226 Difference]: Without dead ends: 61 [2021-05-03 00:07:25,629 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 2916.2ms TimeCoverageRelationStatistics Valid=330, Invalid=600, Unknown=0, NotChecked=0, Total=930 [2021-05-03 00:07:25,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-03 00:07:25,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-05-03 00:07:25,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 56 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:07:25,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2021-05-03 00:07:25,636 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 55 [2021-05-03 00:07:25,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:07:25,636 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2021-05-03 00:07:25,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:07:25,636 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2021-05-03 00:07:25,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-03 00:07:25,637 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:07:25,637 INFO L523 BasicCegarLoop]: trace histogram [20, 14, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:07:25,637 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-05-03 00:07:25,637 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:07:25,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:07:25,637 INFO L82 PathProgramCache]: Analyzing trace with hash -2567297, now seen corresponding path program 16 times [2021-05-03 00:07:25,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:07:25,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [809547660] [2021-05-03 00:07:25,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:07:25,669 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_297 50000) InVars {main_~x~0=v_main_~x~0_297} OutVars{main_~x~0=v_main_~x~0_297} AuxVars[] AssignedVars[] [2021-05-03 00:07:25,670 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-03 00:07:25,702 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:07:25,719 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:07:25,746 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-03 00:07:25,824 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_299 1000000) (<= 50000 v_main_~x~0_299)) InVars {main_~x~0=v_main_~x~0_299} OutVars{main_~x~0=v_main_~x~0_299} AuxVars[] AssignedVars[] [2021-05-03 00:07:25,825 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:07:25,826 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:07:25,827 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:07:25,851 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:07:25,859 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:07:25,963 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:07:26,078 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:07:26,079 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:07:26,084 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_301 999998) (<= 50000 v_main_~x~0_301)) InVars {main_~x~0=v_main_~x~0_301} OutVars{main_~x~0=v_main_~x~0_301} AuxVars[] AssignedVars[] [2021-05-03 00:07:26,086 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:07:26,132 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:07:26,136 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:07:26,158 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:07:26,167 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:07:26,235 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:07:26,355 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 00:07:26,357 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_303 999999) (< v_main_~x~0_303 50000)) InVars {main_~x~0=v_main_~x~0_303} OutVars{main_~x~0=v_main_~x~0_303} AuxVars[] AssignedVars[] [2021-05-03 00:07:26,358 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size [2021-05-03 00:07:26,359 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:07:26,378 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:07:26,444 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size 47 [2021-05-03 00:07:26,520 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:07:26,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:07:27,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:07:27,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:07:27,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:07:27,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:07:27,623 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 14 [2021-05-03 00:07:29,230 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:07:29,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [809547660] [2021-05-03 00:07:29,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [809547660] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:07:29,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:07:29,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-05-03 00:07:29,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694073098] [2021-05-03 00:07:29,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 00:07:29,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:07:29,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 00:07:29,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2021-05-03 00:07:29,232 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 26 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:07:29,520 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-03 00:07:29,805 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:07:30,078 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:07:30,379 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:07:31,175 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:07:31,717 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:07:32,004 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:07:32,315 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:07:32,600 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:07:32,897 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:07:33,196 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:07:33,496 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:07:33,744 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:07:34,018 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:07:34,161 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:07:34,312 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:07:34,466 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:07:34,643 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:07:34,799 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:07:34,963 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:07:35,136 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:07:35,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:07:35,348 INFO L93 Difference]: Finished difference Result 91 states and 99 transitions. [2021-05-03 00:07:35,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 00:07:35,349 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 26 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2021-05-03 00:07:35,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:07:35,350 INFO L225 Difference]: With dead ends: 91 [2021-05-03 00:07:35,350 INFO L226 Difference]: Without dead ends: 64 [2021-05-03 00:07:35,350 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 809 ImplicationChecksByTransitivity, 6401.5ms TimeCoverageRelationStatistics Valid=750, Invalid=2112, Unknown=0, NotChecked=0, Total=2862 [2021-05-03 00:07:35,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-03 00:07:35,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-05-03 00:07:35,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 59 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:07:35,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2021-05-03 00:07:35,355 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 60 [2021-05-03 00:07:35,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:07:35,355 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2021-05-03 00:07:35,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 26 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:07:35,355 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2021-05-03 00:07:35,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-03 00:07:35,356 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:07:35,356 INFO L523 BasicCegarLoop]: trace histogram [21, 15, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:07:35,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-05-03 00:07:35,356 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:07:35,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:07:35,356 INFO L82 PathProgramCache]: Analyzing trace with hash -364785887, now seen corresponding path program 17 times [2021-05-03 00:07:35,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:07:35,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358091452] [2021-05-03 00:07:35,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:07:35,390 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_322 50000) InVars {main_~x~0=v_main_~x~0_322} OutVars{main_~x~0=v_main_~x~0_322} AuxVars[] AssignedVars[] [2021-05-03 00:07:35,392 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-03 00:07:35,428 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:07:35,450 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:07:35,482 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-03 00:07:35,577 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_324 1000000) (<= 50000 v_main_~x~0_324)) InVars {main_~x~0=v_main_~x~0_324} OutVars{main_~x~0=v_main_~x~0_324} AuxVars[] AssignedVars[] [2021-05-03 00:07:35,579 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:07:35,580 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:07:35,581 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:07:35,607 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:07:35,618 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:07:35,734 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:07:35,849 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:07:35,851 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:07:35,856 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50000 v_main_~x~0_326) (< v_main_~x~0_326 999998)) InVars {main_~x~0=v_main_~x~0_326} OutVars{main_~x~0=v_main_~x~0_326} AuxVars[] AssignedVars[] [2021-05-03 00:07:35,859 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:07:35,860 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:07:35,862 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:07:35,890 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:07:35,902 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:07:36,013 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:07:36,137 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:07:36,139 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_328 50000) (< v_main_~x~0_328 999999)) InVars {main_~x~0=v_main_~x~0_328} OutVars{main_~x~0=v_main_~x~0_328} AuxVars[] AssignedVars[] [2021-05-03 00:07:36,140 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size [2021-05-03 00:07:36,141 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:07:36,159 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:07:36,230 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size 47 [2021-05-03 00:07:36,305 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:07:36,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:07:37,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:07:37,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:07:37,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:07:37,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:07:37,471 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 14 [2021-05-03 00:07:39,961 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:07:39,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358091452] [2021-05-03 00:07:39,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1358091452] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:07:39,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:07:39,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2021-05-03 00:07:39,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011728376] [2021-05-03 00:07:39,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 00:07:39,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:07:39,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 00:07:39,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2021-05-03 00:07:39,963 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand has 29 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) [2021-05-03 00:07:40,397 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-03 00:07:41,148 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:07:41,536 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:07:42,359 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:07:42,776 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:07:43,191 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:07:43,602 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:07:44,035 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:07:44,429 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:07:44,841 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:07:45,256 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:07:45,668 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:07:46,493 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:07:47,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:07:47,422 INFO L93 Difference]: Finished difference Result 94 states and 101 transitions. [2021-05-03 00:07:47,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 00:07:47,422 INFO L78 Accepts]: Start accepts. Automaton has has 29 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 63 [2021-05-03 00:07:47,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:07:47,423 INFO L225 Difference]: With dead ends: 94 [2021-05-03 00:07:47,423 INFO L226 Difference]: Without dead ends: 66 [2021-05-03 00:07:47,424 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 6899.8ms TimeCoverageRelationStatistics Valid=208, Invalid=2048, Unknown=0, NotChecked=0, Total=2256 [2021-05-03 00:07:47,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-05-03 00:07:47,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-05-03 00:07:47,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 61 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:07:47,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2021-05-03 00:07:47,428 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 63 [2021-05-03 00:07:47,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:07:47,428 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2021-05-03 00:07:47,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 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) [2021-05-03 00:07:47,429 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2021-05-03 00:07:47,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-03 00:07:47,429 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:07:47,429 INFO L523 BasicCegarLoop]: trace histogram [22, 16, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:07:47,429 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-05-03 00:07:47,429 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:07:47,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:07:47,429 INFO L82 PathProgramCache]: Analyzing trace with hash 644176702, now seen corresponding path program 18 times [2021-05-03 00:07:47,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:07:47,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1971987921] [2021-05-03 00:07:47,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:07:47,452 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_348 50000) InVars {main_~x~0=v_main_~x~0_348} OutVars{main_~x~0=v_main_~x~0_348} AuxVars[] AssignedVars[] [2021-05-03 00:07:47,453 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-03 00:07:47,484 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:07:47,500 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:07:47,526 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-03 00:07:47,605 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50000 v_main_~x~0_350) (< v_main_~x~0_350 1000000)) InVars {main_~x~0=v_main_~x~0_350} OutVars{main_~x~0=v_main_~x~0_350} AuxVars[] AssignedVars[] [2021-05-03 00:07:47,607 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:07:47,648 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:07:47,649 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:07:47,670 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:07:47,679 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:07:47,749 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:07:47,854 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-05-03 00:07:47,878 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:07:47,883 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50000 v_main_~x~0_352) (< v_main_~x~0_352 999998)) InVars {main_~x~0=v_main_~x~0_352} OutVars{main_~x~0=v_main_~x~0_352} AuxVars[] AssignedVars[] [2021-05-03 00:07:47,885 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:07:47,925 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:07:47,926 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:07:47,949 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:07:47,959 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:07:48,023 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:07:48,135 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:07:48,141 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_354 999999) (< v_main_~x~0_354 50000)) InVars {main_~x~0=v_main_~x~0_354} OutVars{main_~x~0=v_main_~x~0_354} AuxVars[] AssignedVars[] [2021-05-03 00:07:48,142 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size [2021-05-03 00:07:48,143 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:07:48,159 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:07:48,216 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size 47 [2021-05-03 00:07:48,282 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:07:48,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:07:49,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:07:49,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:07:49,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:07:49,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:07:49,383 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 14 [2021-05-03 00:07:52,234 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:07:52,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1971987921] [2021-05-03 00:07:52,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1971987921] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:07:52,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:07:52,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2021-05-03 00:07:52,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18069573] [2021-05-03 00:07:52,234 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 00:07:52,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:07:52,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 00:07:52,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=925, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 00:07:52,235 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand has 30 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) [2021-05-03 00:07:52,740 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-03 00:07:53,192 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:07:53,627 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:07:54,082 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:07:54,522 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:07:54,956 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:07:55,408 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:07:55,904 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:07:56,364 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:07:56,821 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:07:57,246 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:07:57,709 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:07:58,132 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:07:58,565 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:07:59,010 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:07:59,813 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:08:00,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:08:00,755 INFO L93 Difference]: Finished difference Result 96 states and 103 transitions. [2021-05-03 00:08:00,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 00:08:00,756 INFO L78 Accepts]: Start accepts. Automaton has has 30 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 65 [2021-05-03 00:08:00,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:08:00,756 INFO L225 Difference]: With dead ends: 96 [2021-05-03 00:08:00,757 INFO L226 Difference]: Without dead ends: 68 [2021-05-03 00:08:00,757 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 7712.2ms TimeCoverageRelationStatistics Valid=217, Invalid=2233, Unknown=0, NotChecked=0, Total=2450 [2021-05-03 00:08:00,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-03 00:08:00,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-05-03 00:08:00,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 63 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:08:00,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2021-05-03 00:08:00,762 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 65 [2021-05-03 00:08:00,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:08:00,762 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2021-05-03 00:08:00,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 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) [2021-05-03 00:08:00,762 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2021-05-03 00:08:00,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-03 00:08:00,762 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:08:00,762 INFO L523 BasicCegarLoop]: trace histogram [23, 17, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:08:00,763 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-05-03 00:08:00,763 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:08:00,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:08:00,763 INFO L82 PathProgramCache]: Analyzing trace with hash -405384165, now seen corresponding path program 19 times [2021-05-03 00:08:00,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:08:00,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400551321] [2021-05-03 00:08:00,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:08:00,786 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_375 50000) InVars {main_~x~0=v_main_~x~0_375} OutVars{main_~x~0=v_main_~x~0_375} AuxVars[] AssignedVars[] [2021-05-03 00:08:00,787 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-03 00:08:00,817 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:08:00,835 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:08:00,862 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-03 00:08:00,936 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50000 v_main_~x~0_377) (< v_main_~x~0_377 1000000)) InVars {main_~x~0=v_main_~x~0_377} OutVars{main_~x~0=v_main_~x~0_377} AuxVars[] AssignedVars[] [2021-05-03 00:08:00,938 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:08:00,980 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:08:00,982 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:08:01,006 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:08:01,014 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:08:01,079 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:08:01,196 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:08:01,197 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:08:01,202 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_379 999998) (<= 50000 v_main_~x~0_379)) InVars {main_~x~0=v_main_~x~0_379} OutVars{main_~x~0=v_main_~x~0_379} AuxVars[] AssignedVars[] [2021-05-03 00:08:01,203 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:08:01,248 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:08:01,259 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:08:01,285 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:08:01,294 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:08:01,364 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:08:01,500 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:08:01,503 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_381 999999) (< v_main_~x~0_381 50000)) InVars {main_~x~0=v_main_~x~0_381} OutVars{main_~x~0=v_main_~x~0_381} AuxVars[] AssignedVars[] [2021-05-03 00:08:01,504 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size [2021-05-03 00:08:01,504 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:08:01,526 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:08:01,598 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size 47 [2021-05-03 00:08:01,668 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:08:01,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:08:02,752 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-05-03 00:08:02,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:08:02,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:08:02,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:08:02,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:08:02,946 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 14 [2021-05-03 00:08:05,399 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:08:05,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400551321] [2021-05-03 00:08:05,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1400551321] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:08:05,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:08:05,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-05-03 00:08:05,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411563664] [2021-05-03 00:08:05,400 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 00:08:05,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:08:05,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 00:08:05,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=771, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 00:08:05,401 INFO L87 Difference]: Start difference. First operand 68 states and 71 transitions. Second operand has 31 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) [2021-05-03 00:08:05,786 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-03 00:08:06,140 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:08:06,486 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:08:06,848 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:08:07,215 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:08:07,584 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:08:07,921 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:08:08,278 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:08:08,612 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:08:08,983 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:08:09,326 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:08:09,667 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:08:10,002 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:08:10,328 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:08:10,915 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:08:11,530 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:08:12,082 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:08:12,243 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:08:13,303 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:08:13,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:08:13,481 INFO L93 Difference]: Finished difference Result 99 states and 107 transitions. [2021-05-03 00:08:13,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 00:08:13,482 INFO L78 Accepts]: Start accepts. Automaton has has 31 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 67 [2021-05-03 00:08:13,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:08:13,483 INFO L225 Difference]: With dead ends: 99 [2021-05-03 00:08:13,483 INFO L226 Difference]: Without dead ends: 71 [2021-05-03 00:08:13,484 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1089 ImplicationChecksByTransitivity, 8503.2ms TimeCoverageRelationStatistics Valid=950, Invalid=2832, Unknown=0, NotChecked=0, Total=3782 [2021-05-03 00:08:13,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-05-03 00:08:13,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-05-03 00:08:13,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 66 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:08:13,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2021-05-03 00:08:13,488 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 67 [2021-05-03 00:08:13,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:08:13,489 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2021-05-03 00:08:13,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 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) [2021-05-03 00:08:13,489 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2021-05-03 00:08:13,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-03 00:08:13,489 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:08:13,489 INFO L523 BasicCegarLoop]: trace histogram [24, 18, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:08:13,489 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-05-03 00:08:13,489 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:08:13,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:08:13,490 INFO L82 PathProgramCache]: Analyzing trace with hash 247656619, now seen corresponding path program 20 times [2021-05-03 00:08:13,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:08:13,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1952411534] [2021-05-03 00:08:13,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:08:13,514 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_403 50000) InVars {main_~x~0=v_main_~x~0_403} OutVars{main_~x~0=v_main_~x~0_403} AuxVars[] AssignedVars[] [2021-05-03 00:08:13,515 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-03 00:08:13,546 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:08:13,565 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:08:13,593 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-03 00:08:13,677 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50000 v_main_~x~0_405) (< v_main_~x~0_405 1000000)) InVars {main_~x~0=v_main_~x~0_405} OutVars{main_~x~0=v_main_~x~0_405} AuxVars[] AssignedVars[] [2021-05-03 00:08:13,678 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:08:13,724 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:08:13,730 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:08:13,752 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:08:13,762 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:08:13,828 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:08:13,940 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:08:13,942 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:08:13,947 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_407 999998) (<= 50000 v_main_~x~0_407)) InVars {main_~x~0=v_main_~x~0_407} OutVars{main_~x~0=v_main_~x~0_407} AuxVars[] AssignedVars[] [2021-05-03 00:08:13,949 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:08:13,949 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:08:13,951 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:08:13,975 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:08:13,985 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:08:14,109 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:08:14,228 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:08:14,230 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_409 999999) (< v_main_~x~0_409 50000)) InVars {main_~x~0=v_main_~x~0_409} OutVars{main_~x~0=v_main_~x~0_409} AuxVars[] AssignedVars[] [2021-05-03 00:08:14,231 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size [2021-05-03 00:08:14,232 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:08:14,250 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:08:14,314 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size 47 [2021-05-03 00:08:14,384 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:08:14,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:08:15,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:08:15,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:08:15,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:08:15,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:08:15,648 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 14 [2021-05-03 00:08:18,195 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:08:18,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1952411534] [2021-05-03 00:08:18,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1952411534] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:08:18,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:08:18,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2021-05-03 00:08:18,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286153143] [2021-05-03 00:08:18,195 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-03 00:08:18,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:08:18,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-03 00:08:18,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=398, Invalid=862, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 00:08:18,196 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:08:18,626 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-03 00:08:19,534 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:08:20,151 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:08:20,466 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:08:20,803 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:08:21,150 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:08:21,503 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:08:21,875 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:08:22,250 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:08:22,640 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:08:23,013 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:08:23,400 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:08:23,822 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:08:24,235 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:08:24,666 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:08:25,095 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:08:25,426 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:08:25,900 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:08:26,073 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:08:26,250 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:08:26,445 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:08:26,633 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:08:26,810 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:08:26,994 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:08:27,179 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:08:27,372 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:08:27,579 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:08:28,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:08:28,090 INFO L93 Difference]: Finished difference Result 103 states and 111 transitions. [2021-05-03 00:08:28,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 00:08:28,090 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2021-05-03 00:08:28,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:08:28,091 INFO L225 Difference]: With dead ends: 103 [2021-05-03 00:08:28,091 INFO L226 Difference]: Without dead ends: 74 [2021-05-03 00:08:28,092 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1246 ImplicationChecksByTransitivity, 9500.1ms TimeCoverageRelationStatistics Valid=1085, Invalid=3205, Unknown=0, NotChecked=0, Total=4290 [2021-05-03 00:08:28,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-03 00:08:28,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-05-03 00:08:28,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 69 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:08:28,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2021-05-03 00:08:28,099 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 70 [2021-05-03 00:08:28,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:08:28,099 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2021-05-03 00:08:28,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:08:28,100 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2021-05-03 00:08:28,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-03 00:08:28,100 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:08:28,100 INFO L523 BasicCegarLoop]: trace histogram [25, 19, 11, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:08:28,100 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-05-03 00:08:28,100 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:08:28,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:08:28,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1834059573, now seen corresponding path program 21 times [2021-05-03 00:08:28,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:08:28,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2037277441] [2021-05-03 00:08:28,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:08:28,134 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_432 50000) InVars {main_~x~0=v_main_~x~0_432} OutVars{main_~x~0=v_main_~x~0_432} AuxVars[] AssignedVars[] [2021-05-03 00:08:28,135 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-03 00:08:28,136 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:08:28,156 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:08:28,228 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-03 00:08:28,316 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_434 1000000) (<= 50000 v_main_~x~0_434)) InVars {main_~x~0=v_main_~x~0_434} OutVars{main_~x~0=v_main_~x~0_434} AuxVars[] AssignedVars[] [2021-05-03 00:08:28,318 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:08:28,318 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:08:28,320 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:08:28,350 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:08:28,361 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:08:28,500 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:08:28,635 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-05-03 00:08:28,637 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:08:28,642 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50000 v_main_~x~0_436) (< v_main_~x~0_436 999998)) InVars {main_~x~0=v_main_~x~0_436} OutVars{main_~x~0=v_main_~x~0_436} AuxVars[] AssignedVars[] [2021-05-03 00:08:28,644 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:08:28,645 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:08:28,647 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:08:28,671 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:08:28,682 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:08:28,811 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:08:28,939 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:08:28,941 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_438 50000) (< v_main_~x~0_438 999999)) InVars {main_~x~0=v_main_~x~0_438} OutVars{main_~x~0=v_main_~x~0_438} AuxVars[] AssignedVars[] [2021-05-03 00:08:28,942 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size [2021-05-03 00:08:28,977 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:08:28,996 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:08:29,026 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size 47 [2021-05-03 00:08:29,103 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:08:29,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:08:30,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:08:30,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:08:30,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:08:30,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:08:30,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:08:30,863 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:08:30,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2037277441] [2021-05-03 00:08:30,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2037277441] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:08:30,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:08:30,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-05-03 00:08:30,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692680316] [2021-05-03 00:08:30,864 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 00:08:30,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:08:30,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 00:08:30,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=318, Unknown=0, NotChecked=0, Total=552 [2021-05-03 00:08:30,864 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:08:31,081 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:08:31,343 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:08:31,578 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:08:31,814 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:08:32,005 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:08:32,233 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:08:32,468 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:08:32,719 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:08:32,848 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:08:33,001 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:08:33,132 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:08:33,277 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:08:33,431 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:08:33,610 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:08:33,807 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:08:34,004 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:08:34,206 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:08:34,382 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:08:34,572 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:08:34,742 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:08:34,922 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:08:34,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:08:34,965 INFO L93 Difference]: Finished difference Result 110 states and 122 transitions. [2021-05-03 00:08:34,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 00:08:34,966 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2021-05-03 00:08:34,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:08:34,966 INFO L225 Difference]: With dead ends: 110 [2021-05-03 00:08:34,966 INFO L226 Difference]: Without dead ends: 80 [2021-05-03 00:08:34,967 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 5047.0ms TimeCoverageRelationStatistics Valid=696, Invalid=1284, Unknown=0, NotChecked=0, Total=1980 [2021-05-03 00:08:34,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-05-03 00:08:34,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-05-03 00:08:34,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.0533333333333332) internal successors, (79), 75 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:08:34,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions. [2021-05-03 00:08:34,973 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 73 [2021-05-03 00:08:34,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:08:34,974 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 83 transitions. [2021-05-03 00:08:34,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:08:34,974 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions. [2021-05-03 00:08:34,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-03 00:08:34,974 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:08:34,974 INFO L523 BasicCegarLoop]: trace histogram [27, 19, 13, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:08:34,974 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-05-03 00:08:34,974 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:08:34,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:08:34,975 INFO L82 PathProgramCache]: Analyzing trace with hash -396894133, now seen corresponding path program 22 times [2021-05-03 00:08:34,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:08:34,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1374965426] [2021-05-03 00:08:34,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:08:34,998 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_467 50000) InVars {main_~x~0=v_main_~x~0_467} OutVars{main_~x~0=v_main_~x~0_467} AuxVars[] AssignedVars[] [2021-05-03 00:08:34,999 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-03 00:08:35,000 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:08:35,022 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:08:35,085 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-03 00:08:35,163 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_469 1000000) (<= 50000 v_main_~x~0_469)) InVars {main_~x~0=v_main_~x~0_469} OutVars{main_~x~0=v_main_~x~0_469} AuxVars[] AssignedVars[] [2021-05-03 00:08:35,165 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:08:35,166 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:08:35,167 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:08:35,193 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:08:35,201 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:08:35,315 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:08:35,451 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 00:08:35,452 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:08:35,458 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_471 999998) (<= 50000 v_main_~x~0_471)) InVars {main_~x~0=v_main_~x~0_471} OutVars{main_~x~0=v_main_~x~0_471} AuxVars[] AssignedVars[] [2021-05-03 00:08:35,460 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:08:35,461 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:08:35,463 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:08:35,492 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:08:35,503 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:08:35,633 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:08:35,752 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:08:35,754 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_473 50000) (< v_main_~x~0_473 999999)) InVars {main_~x~0=v_main_~x~0_473} OutVars{main_~x~0=v_main_~x~0_473} AuxVars[] AssignedVars[] [2021-05-03 00:08:35,755 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size [2021-05-03 00:08:35,755 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:08:35,773 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:08:35,836 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size 47 [2021-05-03 00:08:35,905 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:08:35,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:08:36,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:08:36,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:08:36,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:08:36,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:08:36,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:08:38,037 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:08:38,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1374965426] [2021-05-03 00:08:38,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1374965426] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:08:38,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:08:38,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-05-03 00:08:38,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152118572] [2021-05-03 00:08:38,038 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 00:08:38,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:08:38,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 00:08:38,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=411, Unknown=0, NotChecked=0, Total=702 [2021-05-03 00:08:38,039 INFO L87 Difference]: Start difference. First operand 80 states and 83 transitions. Second operand has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 26 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:08:38,260 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:08:38,536 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:08:38,774 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:08:39,012 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:08:39,232 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:08:39,459 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:08:39,684 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:08:39,909 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:08:40,130 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:08:40,362 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:08:40,500 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:08:41,434 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:08:42,056 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:08:42,261 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:08:42,461 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:08:42,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:08:42,542 INFO L93 Difference]: Finished difference Result 121 states and 132 transitions. [2021-05-03 00:08:42,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 00:08:42,543 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 26 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2021-05-03 00:08:42,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:08:42,544 INFO L225 Difference]: With dead ends: 121 [2021-05-03 00:08:42,544 INFO L226 Difference]: Without dead ends: 85 [2021-05-03 00:08:42,545 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 5597.6ms TimeCoverageRelationStatistics Valid=867, Invalid=1683, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 00:08:42,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-03 00:08:42,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-05-03 00:08:42,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.05) internal successors, (84), 80 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:08:42,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2021-05-03 00:08:42,550 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 79 [2021-05-03 00:08:42,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:08:42,550 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2021-05-03 00:08:42,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 26 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:08:42,550 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2021-05-03 00:08:42,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-05-03 00:08:42,551 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:08:42,551 INFO L523 BasicCegarLoop]: trace histogram [29, 19, 14, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:08:42,551 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-05-03 00:08:42,551 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:08:42,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:08:42,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1779355714, now seen corresponding path program 23 times [2021-05-03 00:08:42,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:08:42,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1366854641] [2021-05-03 00:08:42,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:08:42,576 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_504 50000) InVars {main_~x~0=v_main_~x~0_504} OutVars{main_~x~0=v_main_~x~0_504} AuxVars[] AssignedVars[] [2021-05-03 00:08:42,577 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-03 00:08:42,608 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:08:42,625 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:08:42,648 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-03 00:08:42,719 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_506 1000000) (<= 50000 v_main_~x~0_506)) InVars {main_~x~0=v_main_~x~0_506} OutVars{main_~x~0=v_main_~x~0_506} AuxVars[] AssignedVars[] [2021-05-03 00:08:42,721 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:08:42,722 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:08:42,723 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:08:42,749 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:08:42,759 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:08:42,872 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:08:42,980 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 00:08:42,982 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:08:42,987 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50000 v_main_~x~0_508) (< v_main_~x~0_508 999998)) InVars {main_~x~0=v_main_~x~0_508} OutVars{main_~x~0=v_main_~x~0_508} AuxVars[] AssignedVars[] [2021-05-03 00:08:42,989 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:08:42,990 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:08:42,991 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:08:43,017 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:08:43,027 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:08:43,136 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:08:43,246 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-05-03 00:08:43,248 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_510 999999) (< v_main_~x~0_510 50000)) InVars {main_~x~0=v_main_~x~0_510} OutVars{main_~x~0=v_main_~x~0_510} AuxVars[] AssignedVars[] [2021-05-03 00:08:43,249 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size [2021-05-03 00:08:43,249 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:08:43,267 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:08:43,327 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size 47 [2021-05-03 00:08:43,401 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:08:43,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:08:44,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:08:44,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:08:44,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:08:44,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:08:44,943 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 14 [2021-05-03 00:08:49,172 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:08:49,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1366854641] [2021-05-03 00:08:49,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1366854641] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:08:49,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:08:49,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2021-05-03 00:08:49,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547274286] [2021-05-03 00:08:49,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-03 00:08:49,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:08:49,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-03 00:08:49,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1430, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 00:08:49,174 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand has 38 states, 38 states have (on average 1.6842105263157894) internal successors, (64), 37 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:08:49,750 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-03 00:08:50,267 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:08:50,867 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:08:51,399 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:08:51,903 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:08:52,525 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:08:53,068 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:08:53,607 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:08:54,122 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:08:54,660 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:08:55,219 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:08:55,744 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:08:56,257 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:08:56,791 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:08:57,295 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:08:57,824 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:08:58,344 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:08:59,794 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:09:00,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:09:00,876 INFO L93 Difference]: Finished difference Result 128 states and 135 transitions. [2021-05-03 00:09:00,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 00:09:00,877 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.6842105263157894) internal successors, (64), 37 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 84 [2021-05-03 00:09:00,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:09:00,877 INFO L225 Difference]: With dead ends: 128 [2021-05-03 00:09:00,877 INFO L226 Difference]: Without dead ends: 87 [2021-05-03 00:09:00,878 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 10768.0ms TimeCoverageRelationStatistics Valid=311, Invalid=3349, Unknown=0, NotChecked=0, Total=3660 [2021-05-03 00:09:00,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-05-03 00:09:00,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-05-03 00:09:00,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.048780487804878) internal successors, (86), 82 states have internal predecessors, (86), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:09:00,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions. [2021-05-03 00:09:00,884 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 84 [2021-05-03 00:09:00,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:09:00,884 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 90 transitions. [2021-05-03 00:09:00,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.6842105263157894) internal successors, (64), 37 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:09:00,884 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions. [2021-05-03 00:09:00,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-03 00:09:00,884 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:09:00,884 INFO L523 BasicCegarLoop]: trace histogram [30, 20, 14, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:09:00,885 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2021-05-03 00:09:00,885 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:09:00,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:09:00,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1862211515, now seen corresponding path program 24 times [2021-05-03 00:09:00,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:09:00,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [4569838] [2021-05-03 00:09:00,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:09:00,905 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_534 50000) InVars {main_~x~0=v_main_~x~0_534} OutVars{main_~x~0=v_main_~x~0_534} AuxVars[] AssignedVars[] [2021-05-03 00:09:00,906 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-03 00:09:00,934 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:09:00,950 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:09:00,973 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-03 00:09:01,041 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50000 v_main_~x~0_536) (< v_main_~x~0_536 1000000)) InVars {main_~x~0=v_main_~x~0_536} OutVars{main_~x~0=v_main_~x~0_536} AuxVars[] AssignedVars[] [2021-05-03 00:09:01,042 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:09:01,081 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:09:01,082 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:09:01,104 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:09:01,112 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:09:01,172 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:09:01,281 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:09:01,282 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:09:01,288 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_538 999998) (<= 50000 v_main_~x~0_538)) InVars {main_~x~0=v_main_~x~0_538} OutVars{main_~x~0=v_main_~x~0_538} AuxVars[] AssignedVars[] [2021-05-03 00:09:01,289 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:09:01,290 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:09:01,291 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:09:01,313 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:09:01,323 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:09:01,432 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:09:01,550 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:09:01,553 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_540 999999) (< v_main_~x~0_540 50000)) InVars {main_~x~0=v_main_~x~0_540} OutVars{main_~x~0=v_main_~x~0_540} AuxVars[] AssignedVars[] [2021-05-03 00:09:01,554 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size [2021-05-03 00:09:01,554 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:09:01,573 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:09:01,636 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size 47 [2021-05-03 00:09:01,701 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:09:01,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:09:03,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:09:03,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:09:03,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:09:03,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:09:03,432 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 14 [2021-05-03 00:09:08,093 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:09:08,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [4569838] [2021-05-03 00:09:08,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [4569838] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:09:08,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:09:08,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2021-05-03 00:09:08,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367896763] [2021-05-03 00:09:08,094 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-03 00:09:08,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:09:08,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-03 00:09:08,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1490, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 00:09:08,095 INFO L87 Difference]: Start difference. First operand 87 states and 90 transitions. Second operand has 39 states, 39 states have (on average 1.6923076923076923) internal successors, (66), 38 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:09:08,709 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-03 00:09:09,218 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:09:09,723 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:09:10,254 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:09:10,744 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:09:11,274 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:09:12,345 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:09:12,936 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:09:13,521 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:09:14,113 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:09:14,696 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:09:15,288 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:09:15,864 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:09:16,472 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:09:16,999 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:09:17,538 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:09:18,086 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:09:18,673 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:09:19,235 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:09:19,821 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:09:21,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:09:21,142 INFO L93 Difference]: Finished difference Result 130 states and 137 transitions. [2021-05-03 00:09:21,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 00:09:21,142 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.6923076923076923) internal successors, (66), 38 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2021-05-03 00:09:21,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:09:21,143 INFO L225 Difference]: With dead ends: 130 [2021-05-03 00:09:21,143 INFO L226 Difference]: Without dead ends: 89 [2021-05-03 00:09:21,144 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 11854.2ms TimeCoverageRelationStatistics Valid=358, Invalid=3548, Unknown=0, NotChecked=0, Total=3906 [2021-05-03 00:09:21,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-03 00:09:21,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-05-03 00:09:21,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 84 states have internal predecessors, (88), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:09:21,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2021-05-03 00:09:21,150 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 86 [2021-05-03 00:09:21,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:09:21,150 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2021-05-03 00:09:21,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.6923076923076923) internal successors, (66), 38 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:09:21,150 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2021-05-03 00:09:21,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-05-03 00:09:21,150 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:09:21,150 INFO L523 BasicCegarLoop]: trace histogram [31, 21, 14, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:09:21,150 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-05-03 00:09:21,150 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:09:21,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:09:21,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1009972344, now seen corresponding path program 25 times [2021-05-03 00:09:21,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:09:21,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [872085991] [2021-05-03 00:09:21,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:09:21,174 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_565 50000) InVars {main_~x~0=v_main_~x~0_565} OutVars{main_~x~0=v_main_~x~0_565} AuxVars[] AssignedVars[] [2021-05-03 00:09:21,175 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-03 00:09:21,204 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:09:21,223 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:09:21,253 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-03 00:09:21,337 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50000 v_main_~x~0_567) (< v_main_~x~0_567 1000000)) InVars {main_~x~0=v_main_~x~0_567} OutVars{main_~x~0=v_main_~x~0_567} AuxVars[] AssignedVars[] [2021-05-03 00:09:21,339 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:09:21,340 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:09:21,341 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:09:21,370 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:09:21,379 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:09:21,493 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:09:21,612 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:09:21,613 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:09:21,618 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50000 v_main_~x~0_569) (< v_main_~x~0_569 999998)) InVars {main_~x~0=v_main_~x~0_569} OutVars{main_~x~0=v_main_~x~0_569} AuxVars[] AssignedVars[] [2021-05-03 00:09:21,620 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:09:21,664 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:09:21,665 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:09:21,691 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:09:21,700 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:09:21,781 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:09:21,911 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-05-03 00:09:21,914 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_571 50000) (< v_main_~x~0_571 999999)) InVars {main_~x~0=v_main_~x~0_571} OutVars{main_~x~0=v_main_~x~0_571} AuxVars[] AssignedVars[] [2021-05-03 00:09:21,915 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size [2021-05-03 00:09:21,915 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:09:21,935 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:09:22,008 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size 47 [2021-05-03 00:09:22,088 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:09:22,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:09:23,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:09:23,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:09:23,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:09:23,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:09:23,997 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 14 [2021-05-03 00:09:28,660 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:09:28,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [872085991] [2021-05-03 00:09:28,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [872085991] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:09:28,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:09:28,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2021-05-03 00:09:28,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676613234] [2021-05-03 00:09:28,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-03 00:09:28,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:09:28,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-03 00:09:28,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1591, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 00:09:28,663 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand has 40 states, 40 states have (on average 1.7) internal successors, (68), 39 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:09:29,182 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-03 00:09:29,637 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:09:30,075 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:09:30,509 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:09:31,319 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:09:31,741 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:09:32,144 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:09:32,601 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:09:33,030 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:09:33,491 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:09:33,948 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:09:34,422 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:09:34,928 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:09:35,396 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:09:35,928 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:09:36,428 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:09:36,952 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:09:37,494 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:09:38,022 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:09:38,488 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:09:38,944 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:09:39,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:09:39,763 INFO L93 Difference]: Finished difference Result 132 states and 139 transitions. [2021-05-03 00:09:39,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 00:09:39,764 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.7) internal successors, (68), 39 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 88 [2021-05-03 00:09:39,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:09:39,765 INFO L225 Difference]: With dead ends: 132 [2021-05-03 00:09:39,765 INFO L226 Difference]: Without dead ends: 91 [2021-05-03 00:09:39,766 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 726 ImplicationChecksByTransitivity, 12483.3ms TimeCoverageRelationStatistics Valid=326, Invalid=3834, Unknown=0, NotChecked=0, Total=4160 [2021-05-03 00:09:39,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-05-03 00:09:39,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-05-03 00:09:39,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 86 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:09:39,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 94 transitions. [2021-05-03 00:09:39,772 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 94 transitions. Word has length 88 [2021-05-03 00:09:39,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:09:39,772 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 94 transitions. [2021-05-03 00:09:39,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.7) internal successors, (68), 39 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:09:39,772 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 94 transitions. [2021-05-03 00:09:39,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-03 00:09:39,772 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:09:39,772 INFO L523 BasicCegarLoop]: trace histogram [32, 22, 14, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:09:39,772 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-05-03 00:09:39,772 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:09:39,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:09:39,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1948084747, now seen corresponding path program 26 times [2021-05-03 00:09:39,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:09:39,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1477466637] [2021-05-03 00:09:39,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:09:39,798 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_597 50000) InVars {main_~x~0=v_main_~x~0_597} OutVars{main_~x~0=v_main_~x~0_597} AuxVars[] AssignedVars[] [2021-05-03 00:09:39,799 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-03 00:09:39,799 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:09:39,818 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:09:39,882 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-03 00:09:39,963 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50000 v_main_~x~0_599) (< v_main_~x~0_599 1000000)) InVars {main_~x~0=v_main_~x~0_599} OutVars{main_~x~0=v_main_~x~0_599} AuxVars[] AssignedVars[] [2021-05-03 00:09:39,965 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:09:39,966 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:09:39,967 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:09:39,992 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:09:40,001 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:09:40,114 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:09:40,232 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 00:09:40,234 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:09:40,239 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50000 v_main_~x~0_601) (< v_main_~x~0_601 999998)) InVars {main_~x~0=v_main_~x~0_601} OutVars{main_~x~0=v_main_~x~0_601} AuxVars[] AssignedVars[] [2021-05-03 00:09:40,241 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:09:40,284 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:09:40,286 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:09:40,311 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:09:40,320 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:09:40,394 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:09:40,511 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:09:40,513 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_603 999999) (< v_main_~x~0_603 50000)) InVars {main_~x~0=v_main_~x~0_603} OutVars{main_~x~0=v_main_~x~0_603} AuxVars[] AssignedVars[] [2021-05-03 00:09:40,514 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size [2021-05-03 00:09:40,545 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:09:40,563 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:09:40,588 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size 47 [2021-05-03 00:09:40,653 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:09:40,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:09:42,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:09:42,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:09:42,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:09:42,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:09:42,239 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 14 [2021-05-03 00:09:47,112 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:09:47,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1477466637] [2021-05-03 00:09:47,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1477466637] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:09:47,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:09:47,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2021-05-03 00:09:47,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940377554] [2021-05-03 00:09:47,113 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-03 00:09:47,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:09:47,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-03 00:09:47,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1674, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 00:09:47,114 INFO L87 Difference]: Start difference. First operand 91 states and 94 transitions. Second operand has 41 states, 41 states have (on average 1.7073170731707317) internal successors, (70), 40 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:09:47,711 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-03 00:09:48,270 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:09:48,844 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:09:49,419 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:09:50,502 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:09:51,041 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:09:51,583 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:09:52,180 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:09:52,799 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:09:53,376 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:09:53,938 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:09:54,515 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:09:55,124 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:09:55,734 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:09:56,416 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:09:57,030 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:09:57,634 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:09:58,236 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:09:58,823 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:09:59,339 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:09:59,911 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:10:00,438 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:10:01,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:10:01,901 INFO L93 Difference]: Finished difference Result 134 states and 141 transitions. [2021-05-03 00:10:01,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 00:10:01,901 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7073170731707317) internal successors, (70), 40 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 90 [2021-05-03 00:10:01,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:10:01,902 INFO L225 Difference]: With dead ends: 134 [2021-05-03 00:10:01,902 INFO L226 Difference]: Without dead ends: 93 [2021-05-03 00:10:01,904 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 12698.0ms TimeCoverageRelationStatistics Valid=334, Invalid=4088, Unknown=0, NotChecked=0, Total=4422 [2021-05-03 00:10:01,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-03 00:10:01,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-05-03 00:10:01,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.0454545454545454) internal successors, (92), 88 states have internal predecessors, (92), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:10:01,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 96 transitions. [2021-05-03 00:10:01,910 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 96 transitions. Word has length 90 [2021-05-03 00:10:01,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:10:01,911 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 96 transitions. [2021-05-03 00:10:01,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 1.7073170731707317) internal successors, (70), 40 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:10:01,911 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 96 transitions. [2021-05-03 00:10:01,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-03 00:10:01,911 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:10:01,911 INFO L523 BasicCegarLoop]: trace histogram [33, 23, 14, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:10:01,911 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2021-05-03 00:10:01,911 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:10:01,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:10:01,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1372599246, now seen corresponding path program 27 times [2021-05-03 00:10:01,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:10:01,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1859557620] [2021-05-03 00:10:01,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:10:01,941 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_630 50000) InVars {main_~x~0=v_main_~x~0_630} OutVars{main_~x~0=v_main_~x~0_630} AuxVars[] AssignedVars[] [2021-05-03 00:10:01,942 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-03 00:10:01,981 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:10:02,004 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:10:02,037 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-03 00:10:02,131 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50000 v_main_~x~0_632) (< v_main_~x~0_632 1000000)) InVars {main_~x~0=v_main_~x~0_632} OutVars{main_~x~0=v_main_~x~0_632} AuxVars[] AssignedVars[] [2021-05-03 00:10:02,133 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:10:02,190 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:10:02,192 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:10:02,223 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:10:02,236 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:10:02,322 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:10:02,479 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 00:10:02,481 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:10:02,488 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50000 v_main_~x~0_634) (< v_main_~x~0_634 999998)) InVars {main_~x~0=v_main_~x~0_634} OutVars{main_~x~0=v_main_~x~0_634} AuxVars[] AssignedVars[] [2021-05-03 00:10:02,490 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:10:02,491 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:10:02,501 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:10:02,529 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:10:02,542 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:10:02,672 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:10:02,802 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 00:10:02,804 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_636 50000) (< v_main_~x~0_636 999999)) InVars {main_~x~0=v_main_~x~0_636} OutVars{main_~x~0=v_main_~x~0_636} AuxVars[] AssignedVars[] [2021-05-03 00:10:02,806 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size [2021-05-03 00:10:02,806 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:10:02,829 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:10:02,910 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size 47 [2021-05-03 00:10:02,989 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:10:02,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:10:04,674 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-05-03 00:10:04,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:10:04,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:10:04,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:10:04,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:10:04,844 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 14 [2021-05-03 00:10:11,011 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:10:11,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1859557620] [2021-05-03 00:10:11,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1859557620] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:10:11,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:10:11,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2021-05-03 00:10:11,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582645740] [2021-05-03 00:10:11,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-03 00:10:11,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:10:11,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-03 00:10:11,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1758, Unknown=0, NotChecked=0, Total=1980 [2021-05-03 00:10:11,012 INFO L87 Difference]: Start difference. First operand 93 states and 96 transitions. Second operand has 42 states, 42 states have (on average 1.7142857142857142) internal successors, (72), 41 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:10:11,669 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-03 00:10:12,340 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:10:13,081 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:10:13,790 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:10:14,466 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:10:15,106 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:10:15,795 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:10:16,469 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:10:17,087 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:10:17,748 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:10:18,418 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:10:19,096 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:10:19,770 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:10:20,392 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:10:21,062 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:10:21,656 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:10:22,316 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:10:23,011 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:10:23,708 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:10:24,410 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:10:25,155 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:10:25,887 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:10:26,615 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:10:27,320 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:10:29,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:10:29,021 INFO L93 Difference]: Finished difference Result 136 states and 143 transitions. [2021-05-03 00:10:29,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 00:10:29,021 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.7142857142857142) internal successors, (72), 41 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2021-05-03 00:10:29,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:10:29,022 INFO L225 Difference]: With dead ends: 136 [2021-05-03 00:10:29,022 INFO L226 Difference]: Without dead ends: 95 [2021-05-03 00:10:29,022 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 15581.2ms TimeCoverageRelationStatistics Valid=343, Invalid=4349, Unknown=0, NotChecked=0, Total=4692 [2021-05-03 00:10:29,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-05-03 00:10:29,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-05-03 00:10:29,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 90 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) [2021-05-03 00:10:29,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 98 transitions. [2021-05-03 00:10:29,029 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 98 transitions. Word has length 92 [2021-05-03 00:10:29,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:10:29,029 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 98 transitions. [2021-05-03 00:10:29,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 1.7142857142857142) internal successors, (72), 41 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:10:29,029 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 98 transitions. [2021-05-03 00:10:29,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-03 00:10:29,029 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:10:29,029 INFO L523 BasicCegarLoop]: trace histogram [34, 24, 14, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:10:29,029 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2021-05-03 00:10:29,029 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:10:29,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:10:29,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1913153327, now seen corresponding path program 28 times [2021-05-03 00:10:29,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:10:29,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1666548548] [2021-05-03 00:10:29,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:10:29,070 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_664 50000) InVars {main_~x~0=v_main_~x~0_664} OutVars{main_~x~0=v_main_~x~0_664} AuxVars[] AssignedVars[] [2021-05-03 00:10:29,071 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-03 00:10:29,107 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:10:29,127 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:10:29,159 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-03 00:10:29,242 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50000 v_main_~x~0_666) (< v_main_~x~0_666 1000000)) InVars {main_~x~0=v_main_~x~0_666} OutVars{main_~x~0=v_main_~x~0_666} AuxVars[] AssignedVars[] [2021-05-03 00:10:29,244 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:10:29,291 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:10:29,293 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:10:29,324 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:10:29,335 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:10:29,416 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:10:29,560 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-05-03 00:10:29,562 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:10:29,568 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50000 v_main_~x~0_668) (< v_main_~x~0_668 999998)) InVars {main_~x~0=v_main_~x~0_668} OutVars{main_~x~0=v_main_~x~0_668} AuxVars[] AssignedVars[] [2021-05-03 00:10:29,569 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:10:29,625 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:10:29,627 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:10:29,657 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:10:29,670 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:10:29,753 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:10:29,880 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 00:10:29,883 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_670 999999) (< v_main_~x~0_670 50000)) InVars {main_~x~0=v_main_~x~0_670} OutVars{main_~x~0=v_main_~x~0_670} AuxVars[] AssignedVars[] [2021-05-03 00:10:29,884 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size [2021-05-03 00:10:29,884 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:10:29,904 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:10:29,972 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size 47 [2021-05-03 00:10:30,054 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:10:30,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:10:31,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:10:31,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:10:31,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:10:31,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:10:31,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:10:32,747 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:10:32,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1666548548] [2021-05-03 00:10:32,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1666548548] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:10:32,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:10:32,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2021-05-03 00:10:32,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037564224] [2021-05-03 00:10:32,748 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 00:10:32,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:10:32,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 00:10:32,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=517, Unknown=0, NotChecked=0, Total=870 [2021-05-03 00:10:32,748 INFO L87 Difference]: Start difference. First operand 95 states and 98 transitions. Second operand has 30 states, 30 states have (on average 1.5) internal successors, (45), 29 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:10:33,088 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:10:33,480 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:10:33,784 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:10:34,068 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:10:34,359 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:10:34,674 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:10:34,966 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:10:35,255 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:10:35,565 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:10:35,857 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:10:36,180 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:10:36,507 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:10:36,675 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:10:36,852 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:10:37,039 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:10:37,215 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:10:37,388 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:10:37,580 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:10:37,760 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:10:37,952 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:10:38,141 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:10:38,334 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:10:38,537 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:10:38,742 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:10:38,932 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:10:39,143 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:10:39,355 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:10:39,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:10:39,642 INFO L93 Difference]: Finished difference Result 141 states and 152 transitions. [2021-05-03 00:10:39,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 00:10:39,643 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5) internal successors, (45), 29 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 94 [2021-05-03 00:10:39,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:10:39,644 INFO L225 Difference]: With dead ends: 141 [2021-05-03 00:10:39,644 INFO L226 Difference]: Without dead ends: 100 [2021-05-03 00:10:39,644 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 880 ImplicationChecksByTransitivity, 7675.0ms TimeCoverageRelationStatistics Valid=1053, Invalid=2139, Unknown=0, NotChecked=0, Total=3192 [2021-05-03 00:10:39,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-05-03 00:10:39,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2021-05-03 00:10:39,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.0421052631578946) internal successors, (99), 95 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:10:39,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 103 transitions. [2021-05-03 00:10:39,651 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 103 transitions. Word has length 94 [2021-05-03 00:10:39,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:10:39,651 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 103 transitions. [2021-05-03 00:10:39,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.5) internal successors, (45), 29 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:10:39,651 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 103 transitions. [2021-05-03 00:10:39,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-05-03 00:10:39,652 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:10:39,652 INFO L523 BasicCegarLoop]: trace histogram [36, 24, 15, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:10:39,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2021-05-03 00:10:39,652 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:10:39,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:10:39,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1762713944, now seen corresponding path program 29 times [2021-05-03 00:10:39,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:10:39,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1801335010] [2021-05-03 00:10:39,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:10:39,682 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_708 50000) InVars {main_~x~0=v_main_~x~0_708} OutVars{main_~x~0=v_main_~x~0_708} AuxVars[] AssignedVars[] [2021-05-03 00:10:39,683 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-03 00:10:39,684 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:10:39,707 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:10:39,801 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-03 00:10:39,891 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_710 1000000) (<= 50000 v_main_~x~0_710)) InVars {main_~x~0=v_main_~x~0_710} OutVars{main_~x~0=v_main_~x~0_710} AuxVars[] AssignedVars[] [2021-05-03 00:10:39,893 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:10:39,893 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:10:39,895 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:10:39,920 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:10:39,930 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:10:40,060 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:10:40,198 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 00:10:40,199 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:10:40,206 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50000 v_main_~x~0_712) (< v_main_~x~0_712 999998)) InVars {main_~x~0=v_main_~x~0_712} OutVars{main_~x~0=v_main_~x~0_712} AuxVars[] AssignedVars[] [2021-05-03 00:10:40,209 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:10:40,210 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:10:40,211 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:10:40,237 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:10:40,248 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:10:40,379 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:10:40,519 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:10:40,521 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_714 50000) (< v_main_~x~0_714 999999)) InVars {main_~x~0=v_main_~x~0_714} OutVars{main_~x~0=v_main_~x~0_714} AuxVars[] AssignedVars[] [2021-05-03 00:10:40,522 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size [2021-05-03 00:10:40,559 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:10:40,578 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:10:40,607 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size 47 [2021-05-03 00:10:40,678 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:10:40,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:10:42,528 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-05-03 00:10:42,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:10:42,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:10:42,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:10:42,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:10:42,703 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 14 [2021-05-03 00:10:49,706 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:10:49,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1801335010] [2021-05-03 00:10:49,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1801335010] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:10:49,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:10:49,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2021-05-03 00:10:49,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964300450] [2021-05-03 00:10:49,707 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-03 00:10:49,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:10:49,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-03 00:10:49,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1920, Unknown=0, NotChecked=0, Total=2162 [2021-05-03 00:10:49,708 INFO L87 Difference]: Start difference. First operand 100 states and 103 transitions. Second operand has 44 states, 44 states have (on average 1.7045454545454546) internal successors, (75), 43 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:10:50,415 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-03 00:10:51,142 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:10:51,834 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:10:52,612 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:10:53,299 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:10:54,015 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:10:54,745 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:10:55,492 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:10:56,215 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:10:56,939 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:10:57,672 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:10:58,385 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:10:59,188 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:10:59,938 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:11:00,587 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:11:01,225 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:11:01,945 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:11:02,671 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:11:03,363 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:11:04,087 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:11:04,803 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:11:05,504 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:11:06,231 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:11:06,973 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:11:07,761 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:11:09,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:11:09,548 INFO L93 Difference]: Finished difference Result 148 states and 155 transitions. [2021-05-03 00:11:09,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 00:11:09,549 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7045454545454546) internal successors, (75), 43 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 99 [2021-05-03 00:11:09,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:11:09,550 INFO L225 Difference]: With dead ends: 148 [2021-05-03 00:11:09,550 INFO L226 Difference]: Without dead ends: 102 [2021-05-03 00:11:09,551 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 917 ImplicationChecksByTransitivity, 17324.4ms TimeCoverageRelationStatistics Valid=368, Invalid=4744, Unknown=0, NotChecked=0, Total=5112 [2021-05-03 00:11:09,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-05-03 00:11:09,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2021-05-03 00:11:09,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 97 states have (on average 1.041237113402062) internal successors, (101), 97 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:11:09,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 105 transitions. [2021-05-03 00:11:09,558 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 105 transitions. Word has length 99 [2021-05-03 00:11:09,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:11:09,558 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 105 transitions. [2021-05-03 00:11:09,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.7045454545454546) internal successors, (75), 43 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:11:09,558 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 105 transitions. [2021-05-03 00:11:09,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-05-03 00:11:09,559 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:11:09,559 INFO L523 BasicCegarLoop]: trace histogram [37, 25, 15, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:11:09,559 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2021-05-03 00:11:09,559 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:11:09,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:11:09,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1086349243, now seen corresponding path program 30 times [2021-05-03 00:11:09,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:11:09,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [782114129] [2021-05-03 00:11:09,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:11:09,590 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_743 50000) InVars {main_~x~0=v_main_~x~0_743} OutVars{main_~x~0=v_main_~x~0_743} AuxVars[] AssignedVars[] [2021-05-03 00:11:09,591 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-03 00:11:09,592 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:11:09,613 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:11:09,701 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-03 00:11:09,803 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-05-03 00:11:09,815 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50000 v_main_~x~0_745) (< v_main_~x~0_745 1000000)) InVars {main_~x~0=v_main_~x~0_745} OutVars{main_~x~0=v_main_~x~0_745} AuxVars[] AssignedVars[] [2021-05-03 00:11:09,816 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:11:09,870 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:11:09,873 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:11:09,903 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:11:09,913 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:11:09,992 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:11:10,131 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 00:11:10,133 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:11:10,139 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_747 999998) (<= 50000 v_main_~x~0_747)) InVars {main_~x~0=v_main_~x~0_747} OutVars{main_~x~0=v_main_~x~0_747} AuxVars[] AssignedVars[] [2021-05-03 00:11:10,140 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:11:10,141 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:11:10,142 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:11:10,167 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:11:10,177 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:11:10,304 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:11:10,438 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:11:10,440 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_749 50000) (< v_main_~x~0_749 999999)) InVars {main_~x~0=v_main_~x~0_749} OutVars{main_~x~0=v_main_~x~0_749} AuxVars[] AssignedVars[] [2021-05-03 00:11:10,441 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size [2021-05-03 00:11:10,442 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:11:10,463 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:11:10,537 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size 47 [2021-05-03 00:11:10,617 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:11:10,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:11:11,972 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-05-03 00:11:11,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:11:11,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:11:11,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:11:11,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:11:11,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:11:13,871 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:11:13,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [782114129] [2021-05-03 00:11:13,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [782114129] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:11:13,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:11:13,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2021-05-03 00:11:13,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123397892] [2021-05-03 00:11:13,872 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-03 00:11:13,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:11:13,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-03 00:11:13,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=420, Invalid=636, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 00:11:13,873 INFO L87 Difference]: Start difference. First operand 102 states and 105 transitions. Second operand has 33 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 32 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:11:14,240 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:11:14,640 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:11:14,978 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:11:15,299 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:11:15,611 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:11:15,934 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:11:16,273 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:11:16,635 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:11:16,975 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:11:17,325 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:11:17,654 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:11:17,990 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:11:18,348 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:11:18,712 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:11:18,852 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:11:19,075 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:11:19,242 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:11:19,420 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:11:19,577 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:11:19,745 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:11:19,908 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:11:20,077 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:11:20,238 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:11:20,415 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:11:20,618 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:11:20,808 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:11:20,984 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:11:21,180 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:11:21,381 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:11:21,588 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:11:22,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:11:22,030 INFO L93 Difference]: Finished difference Result 153 states and 164 transitions. [2021-05-03 00:11:22,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 00:11:22,031 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 32 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2021-05-03 00:11:22,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:11:22,031 INFO L225 Difference]: With dead ends: 153 [2021-05-03 00:11:22,032 INFO L226 Difference]: Without dead ends: 107 [2021-05-03 00:11:22,032 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1108 ImplicationChecksByTransitivity, 8741.8ms TimeCoverageRelationStatistics Valid=1254, Invalid=2652, Unknown=0, NotChecked=0, Total=3906 [2021-05-03 00:11:22,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-05-03 00:11:22,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-05-03 00:11:22,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.0392156862745099) internal successors, (106), 102 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) [2021-05-03 00:11:22,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 110 transitions. [2021-05-03 00:11:22,039 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 110 transitions. Word has length 101 [2021-05-03 00:11:22,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:11:22,039 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 110 transitions. [2021-05-03 00:11:22,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 32 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:11:22,040 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 110 transitions. [2021-05-03 00:11:22,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-05-03 00:11:22,040 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:11:22,040 INFO L523 BasicCegarLoop]: trace histogram [39, 25, 16, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:11:22,040 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2021-05-03 00:11:22,040 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:11:22,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:11:22,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1010197000, now seen corresponding path program 31 times [2021-05-03 00:11:22,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:11:22,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [474884475] [2021-05-03 00:11:22,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:11:22,070 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_790 50000) InVars {main_~x~0=v_main_~x~0_790} OutVars{main_~x~0=v_main_~x~0_790} AuxVars[] AssignedVars[] [2021-05-03 00:11:22,072 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-03 00:11:22,072 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:11:22,093 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:11:22,167 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-03 00:11:22,270 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_792 1000000) (<= 50000 v_main_~x~0_792)) InVars {main_~x~0=v_main_~x~0_792} OutVars{main_~x~0=v_main_~x~0_792} AuxVars[] AssignedVars[] [2021-05-03 00:11:22,272 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:11:22,273 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:11:22,275 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:11:22,301 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:11:22,313 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:11:22,458 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:11:22,615 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-05-03 00:11:22,617 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:11:22,623 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_794 999998) (<= 50000 v_main_~x~0_794)) InVars {main_~x~0=v_main_~x~0_794} OutVars{main_~x~0=v_main_~x~0_794} AuxVars[] AssignedVars[] [2021-05-03 00:11:22,625 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:11:22,673 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:11:22,676 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:11:22,698 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:11:22,708 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:11:22,775 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:11:22,887 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:11:22,889 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_796 50000) (< v_main_~x~0_796 999999)) InVars {main_~x~0=v_main_~x~0_796} OutVars{main_~x~0=v_main_~x~0_796} AuxVars[] AssignedVars[] [2021-05-03 00:11:22,890 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size [2021-05-03 00:11:22,923 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:11:22,944 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:11:22,974 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size 47 [2021-05-03 00:11:23,055 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:11:23,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:11:24,933 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-05-03 00:11:24,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:11:24,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:11:24,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:11:24,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:11:25,117 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 14 [2021-05-03 00:11:31,893 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:11:31,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [474884475] [2021-05-03 00:11:31,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [474884475] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:11:31,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:11:31,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2021-05-03 00:11:31,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808081137] [2021-05-03 00:11:31,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-03 00:11:31,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:11:31,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-03 00:11:31,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=2089, Unknown=0, NotChecked=0, Total=2352 [2021-05-03 00:11:31,895 INFO L87 Difference]: Start difference. First operand 107 states and 110 transitions. Second operand has 46 states, 46 states have (on average 1.6956521739130435) internal successors, (78), 45 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:11:32,659 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-03 00:11:33,490 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:11:34,213 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:11:34,960 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:11:35,764 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:11:36,535 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:11:37,377 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:11:38,193 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:11:38,953 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:11:39,684 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:11:40,434 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:11:41,150 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:11:41,882 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:11:42,665 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:11:43,426 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:11:44,161 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:11:44,914 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:11:45,607 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:11:46,312 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:11:47,054 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:11:47,799 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:11:48,532 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:11:49,331 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:11:50,058 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:11:50,828 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:11:51,508 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:11:53,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:11:53,170 INFO L93 Difference]: Finished difference Result 160 states and 167 transitions. [2021-05-03 00:11:53,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 00:11:53,171 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.6956521739130435) internal successors, (78), 45 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 106 [2021-05-03 00:11:53,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:11:53,172 INFO L225 Difference]: With dead ends: 160 [2021-05-03 00:11:53,172 INFO L226 Difference]: Without dead ends: 109 [2021-05-03 00:11:53,173 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 56 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 995 ImplicationChecksByTransitivity, 17817.7ms TimeCoverageRelationStatistics Valid=394, Invalid=5156, Unknown=0, NotChecked=0, Total=5550 [2021-05-03 00:11:53,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-03 00:11:53,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-05-03 00:11:53,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.0384615384615385) internal successors, (108), 104 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) [2021-05-03 00:11:53,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 112 transitions. [2021-05-03 00:11:53,180 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 112 transitions. Word has length 106 [2021-05-03 00:11:53,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:11:53,180 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 112 transitions. [2021-05-03 00:11:53,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 1.6956521739130435) internal successors, (78), 45 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:11:53,180 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 112 transitions. [2021-05-03 00:11:53,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-05-03 00:11:53,180 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:11:53,180 INFO L523 BasicCegarLoop]: trace histogram [40, 26, 16, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:11:53,180 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2021-05-03 00:11:53,181 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:11:53,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:11:53,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1184581067, now seen corresponding path program 32 times [2021-05-03 00:11:53,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:11:53,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [99609576] [2021-05-03 00:11:53,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:11:53,208 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_826 50000) InVars {main_~x~0=v_main_~x~0_826} OutVars{main_~x~0=v_main_~x~0_826} AuxVars[] AssignedVars[] [2021-05-03 00:11:53,209 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-03 00:11:53,242 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:11:53,261 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:11:53,289 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-03 00:11:53,377 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50000 v_main_~x~0_828) (< v_main_~x~0_828 1000000)) InVars {main_~x~0=v_main_~x~0_828} OutVars{main_~x~0=v_main_~x~0_828} AuxVars[] AssignedVars[] [2021-05-03 00:11:53,379 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:11:53,379 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:11:53,381 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:11:53,415 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:11:53,427 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:11:53,558 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:11:53,688 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:11:53,689 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:11:53,696 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50000 v_main_~x~0_830) (< v_main_~x~0_830 999998)) InVars {main_~x~0=v_main_~x~0_830} OutVars{main_~x~0=v_main_~x~0_830} AuxVars[] AssignedVars[] [2021-05-03 00:11:53,702 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:11:53,703 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:11:53,705 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:11:53,732 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:11:53,744 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:11:53,869 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:11:54,022 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:11:54,025 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_832 50000) (< v_main_~x~0_832 999999)) InVars {main_~x~0=v_main_~x~0_832} OutVars{main_~x~0=v_main_~x~0_832} AuxVars[] AssignedVars[] [2021-05-03 00:11:54,026 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size [2021-05-03 00:11:54,027 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:11:54,050 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:11:54,137 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size 47 [2021-05-03 00:11:54,223 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:11:54,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:11:56,258 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-05-03 00:11:56,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:11:56,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:11:56,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:11:56,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:11:56,463 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 14 [2021-05-03 00:12:03,660 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:12:03,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [99609576] [2021-05-03 00:12:03,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [99609576] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:12:03,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:12:03,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-05-03 00:12:03,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601501018] [2021-05-03 00:12:03,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-03 00:12:03,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:12:03,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-03 00:12:03,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=2185, Unknown=0, NotChecked=0, Total=2450 [2021-05-03 00:12:03,662 INFO L87 Difference]: Start difference. First operand 109 states and 112 transitions. Second operand has 47 states, 47 states have (on average 1.702127659574468) internal successors, (80), 46 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:12:04,559 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-03 00:12:05,309 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:12:06,041 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:12:06,825 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:12:07,650 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:12:08,465 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:12:09,152 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:12:09,898 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:12:10,642 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:12:11,337 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:12:12,065 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:12:12,855 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:12:13,694 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:12:14,466 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:12:15,168 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:12:15,888 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:12:16,630 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:12:17,362 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:12:18,075 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:12:18,842 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:12:19,560 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:12:20,281 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:12:21,012 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:12:21,646 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:12:22,343 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:12:23,032 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:12:23,727 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:12:25,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:12:25,531 INFO L93 Difference]: Finished difference Result 162 states and 169 transitions. [2021-05-03 00:12:25,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 00:12:25,531 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.702127659574468) internal successors, (80), 46 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 108 [2021-05-03 00:12:25,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:12:25,532 INFO L225 Difference]: With dead ends: 162 [2021-05-03 00:12:25,532 INFO L226 Difference]: Without dead ends: 111 [2021-05-03 00:12:25,533 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 57 SyntacticMatches, 4 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 18424.7ms TimeCoverageRelationStatistics Valid=401, Invalid=5451, Unknown=0, NotChecked=0, Total=5852 [2021-05-03 00:12:25,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-03 00:12:25,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2021-05-03 00:12:25,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.0377358490566038) internal successors, (110), 106 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) [2021-05-03 00:12:25,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 114 transitions. [2021-05-03 00:12:25,539 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 114 transitions. Word has length 108 [2021-05-03 00:12:25,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:12:25,540 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 114 transitions. [2021-05-03 00:12:25,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.702127659574468) internal successors, (80), 46 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:12:25,540 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 114 transitions. [2021-05-03 00:12:25,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-03 00:12:25,540 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:12:25,540 INFO L523 BasicCegarLoop]: trace histogram [41, 27, 16, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:12:25,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2021-05-03 00:12:25,540 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:12:25,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:12:25,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1263944910, now seen corresponding path program 33 times [2021-05-03 00:12:25,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:12:25,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [901646760] [2021-05-03 00:12:25,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:12:25,567 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_863 50000) InVars {main_~x~0=v_main_~x~0_863} OutVars{main_~x~0=v_main_~x~0_863} AuxVars[] AssignedVars[] [2021-05-03 00:12:25,568 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-03 00:12:25,599 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:12:25,618 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:12:25,646 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-03 00:12:25,730 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_865 1000000) (<= 50000 v_main_~x~0_865)) InVars {main_~x~0=v_main_~x~0_865} OutVars{main_~x~0=v_main_~x~0_865} AuxVars[] AssignedVars[] [2021-05-03 00:12:25,731 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:12:25,732 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:12:25,734 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:12:25,759 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:12:25,770 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:12:25,903 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:12:26,028 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:12:26,030 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:12:26,037 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50000 v_main_~x~0_867) (< v_main_~x~0_867 999998)) InVars {main_~x~0=v_main_~x~0_867} OutVars{main_~x~0=v_main_~x~0_867} AuxVars[] AssignedVars[] [2021-05-03 00:12:26,039 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:12:26,039 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:12:26,041 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:12:26,072 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:12:26,082 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:12:26,206 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:12:26,344 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:12:26,346 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_869 50000) (< v_main_~x~0_869 999999)) InVars {main_~x~0=v_main_~x~0_869} OutVars{main_~x~0=v_main_~x~0_869} AuxVars[] AssignedVars[] [2021-05-03 00:12:26,347 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size [2021-05-03 00:12:26,392 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:12:26,416 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:12:26,452 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size 47 [2021-05-03 00:12:26,537 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:12:26,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:12:28,614 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-05-03 00:12:28,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:12:28,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:12:28,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:12:28,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:12:30,028 WARN L205 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 56 DAG size of output: 14 [2021-05-03 00:12:37,498 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:12:37,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [901646760] [2021-05-03 00:12:37,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [901646760] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:12:37,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:12:37,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2021-05-03 00:12:37,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958652325] [2021-05-03 00:12:37,498 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-03 00:12:37,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:12:37,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-03 00:12:37,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=2282, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 00:12:37,499 INFO L87 Difference]: Start difference. First operand 111 states and 114 transitions. Second operand has 48 states, 48 states have (on average 1.7083333333333333) internal successors, (82), 47 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:12:38,396 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-03 00:12:39,150 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:12:39,916 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:12:40,666 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:12:41,417 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:12:42,164 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:12:43,034 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:12:43,874 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:12:44,631 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:12:45,361 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:12:46,043 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:12:46,782 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:12:47,536 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:12:48,268 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:12:49,109 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:12:49,912 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:12:50,686 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:12:51,436 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:12:52,108 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:12:52,837 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:12:53,598 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:12:54,342 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:12:55,088 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:12:55,821 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:12:56,580 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:12:57,316 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:12:58,053 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:12:58,798 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:13:00,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:13:00,516 INFO L93 Difference]: Finished difference Result 164 states and 171 transitions. [2021-05-03 00:13:00,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 00:13:00,517 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.7083333333333333) internal successors, (82), 47 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 110 [2021-05-03 00:13:00,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:13:00,517 INFO L225 Difference]: With dead ends: 164 [2021-05-03 00:13:00,517 INFO L226 Difference]: Without dead ends: 113 [2021-05-03 00:13:00,518 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 58 SyntacticMatches, 4 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1073 ImplicationChecksByTransitivity, 19354.1ms TimeCoverageRelationStatistics Valid=409, Invalid=5753, Unknown=0, NotChecked=0, Total=6162 [2021-05-03 00:13:00,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-05-03 00:13:00,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2021-05-03 00:13:00,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.037037037037037) internal successors, (112), 108 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) [2021-05-03 00:13:00,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 116 transitions. [2021-05-03 00:13:00,525 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 116 transitions. Word has length 110 [2021-05-03 00:13:00,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:13:00,525 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 116 transitions. [2021-05-03 00:13:00,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 1.7083333333333333) internal successors, (82), 47 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:13:00,525 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 116 transitions. [2021-05-03 00:13:00,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-05-03 00:13:00,525 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:13:00,525 INFO L523 BasicCegarLoop]: trace histogram [42, 28, 16, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:13:00,526 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2021-05-03 00:13:00,526 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:13:00,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:13:00,526 INFO L82 PathProgramCache]: Analyzing trace with hash 223186705, now seen corresponding path program 34 times [2021-05-03 00:13:00,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:13:00,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1279670591] [2021-05-03 00:13:00,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:13:00,569 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_901 50000) InVars {main_~x~0=v_main_~x~0_901} OutVars{main_~x~0=v_main_~x~0_901} AuxVars[] AssignedVars[] [2021-05-03 00:13:00,570 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-03 00:13:00,571 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:13:00,590 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:13:00,660 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-03 00:13:00,740 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_903 1000000) (<= 50000 v_main_~x~0_903)) InVars {main_~x~0=v_main_~x~0_903} OutVars{main_~x~0=v_main_~x~0_903} AuxVars[] AssignedVars[] [2021-05-03 00:13:00,742 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:13:00,786 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:13:00,789 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:13:00,815 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:13:00,824 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:13:00,890 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:13:01,010 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 00:13:01,011 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:13:01,016 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_905 999998) (<= 50000 v_main_~x~0_905)) InVars {main_~x~0=v_main_~x~0_905} OutVars{main_~x~0=v_main_~x~0_905} AuxVars[] AssignedVars[] [2021-05-03 00:13:01,018 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:13:01,060 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:13:01,062 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:13:01,087 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:13:01,096 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:13:01,173 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:13:01,316 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 00:13:01,318 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_907 50000) (< v_main_~x~0_907 999999)) InVars {main_~x~0=v_main_~x~0_907} OutVars{main_~x~0=v_main_~x~0_907} AuxVars[] AssignedVars[] [2021-05-03 00:13:01,319 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size [2021-05-03 00:13:01,350 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:13:01,368 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:13:01,397 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size 47 [2021-05-03 00:13:01,473 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:13:01,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:13:03,081 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-05-03 00:13:03,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:13:03,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:13:03,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:13:03,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:13:03,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:13:05,530 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:13:05,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1279670591] [2021-05-03 00:13:05,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1279670591] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:13:05,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:13:05,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2021-05-03 00:13:05,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092174420] [2021-05-03 00:13:05,531 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-03 00:13:05,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:13:05,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-03 00:13:05,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=527, Invalid=805, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 00:13:05,532 INFO L87 Difference]: Start difference. First operand 113 states and 116 transitions. Second operand has 37 states, 37 states have (on average 1.4864864864864864) internal successors, (55), 36 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:13:05,883 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:13:06,348 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:13:06,707 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:13:07,111 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:13:07,492 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:13:07,847 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:13:08,243 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:13:08,603 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:13:08,991 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:13:09,328 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:13:09,658 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:13:10,009 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:13:10,353 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:13:10,656 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:13:10,956 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:13:11,290 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:13:11,455 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:13:11,602 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:13:11,739 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:13:11,883 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:13:12,048 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:13:12,221 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:13:12,394 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:13:12,568 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:13:12,737 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:13:12,905 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:13:13,083 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:13:13,283 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:13:13,508 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:13:13,721 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:13:13,931 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:13:14,169 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:13:14,392 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:13:14,639 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:13:14,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:13:14,834 INFO L93 Difference]: Finished difference Result 170 states and 182 transitions. [2021-05-03 00:13:14,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-03 00:13:14,835 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.4864864864864864) internal successors, (55), 36 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 112 [2021-05-03 00:13:14,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:13:14,836 INFO L225 Difference]: With dead ends: 170 [2021-05-03 00:13:14,836 INFO L226 Difference]: Without dead ends: 119 [2021-05-03 00:13:14,836 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1409 ImplicationChecksByTransitivity, 10561.8ms TimeCoverageRelationStatistics Valid=1575, Invalid=3395, Unknown=0, NotChecked=0, Total=4970 [2021-05-03 00:13:14,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-03 00:13:14,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2021-05-03 00:13:14,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.0350877192982457) internal successors, (118), 114 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) [2021-05-03 00:13:14,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 122 transitions. [2021-05-03 00:13:14,844 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 122 transitions. Word has length 112 [2021-05-03 00:13:14,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:13:14,844 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 122 transitions. [2021-05-03 00:13:14,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.4864864864864864) internal successors, (55), 36 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:13:14,844 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 122 transitions. [2021-05-03 00:13:14,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-05-03 00:13:14,845 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:13:14,845 INFO L523 BasicCegarLoop]: trace histogram [44, 28, 18, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:13:14,845 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2021-05-03 00:13:14,845 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:13:14,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:13:14,845 INFO L82 PathProgramCache]: Analyzing trace with hash 941114747, now seen corresponding path program 35 times [2021-05-03 00:13:14,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:13:14,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1772294048] [2021-05-03 00:13:14,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:13:14,874 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_953 50000) InVars {main_~x~0=v_main_~x~0_953} OutVars{main_~x~0=v_main_~x~0_953} AuxVars[] AssignedVars[] [2021-05-03 00:13:14,875 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-03 00:13:14,875 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:13:14,895 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:13:14,969 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-03 00:13:15,061 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_955 1000000) (<= 50000 v_main_~x~0_955)) InVars {main_~x~0=v_main_~x~0_955} OutVars{main_~x~0=v_main_~x~0_955} AuxVars[] AssignedVars[] [2021-05-03 00:13:15,062 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:13:15,063 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:13:15,065 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:13:15,094 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:13:15,106 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:13:15,251 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:13:15,395 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:13:15,396 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:13:15,402 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_957 999998) (<= 50000 v_main_~x~0_957)) InVars {main_~x~0=v_main_~x~0_957} OutVars{main_~x~0=v_main_~x~0_957} AuxVars[] AssignedVars[] [2021-05-03 00:13:15,403 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:13:15,404 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:13:15,405 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:13:15,431 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:13:15,442 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:13:15,578 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:13:15,708 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:13:15,710 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_959 999999) (< v_main_~x~0_959 50000)) InVars {main_~x~0=v_main_~x~0_959} OutVars{main_~x~0=v_main_~x~0_959} AuxVars[] AssignedVars[] [2021-05-03 00:13:15,711 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size [2021-05-03 00:13:15,712 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:13:15,731 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:13:15,805 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size 47 [2021-05-03 00:13:15,888 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:13:15,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:13:16,121 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 14 [2021-05-03 00:13:18,316 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-05-03 00:13:18,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:13:18,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:13:18,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:13:18,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:13:19,984 WARN L205 SmtUtils]: Spent 1.65 s on a formula simplification. DAG size of input: 55 DAG size of output: 14 [2021-05-03 00:13:20,173 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 10 [2021-05-03 00:13:25,975 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:13:25,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1772294048] [2021-05-03 00:13:25,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1772294048] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:13:25,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:13:25,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2021-05-03 00:13:25,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062606802] [2021-05-03 00:13:25,975 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-03 00:13:25,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:13:25,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-03 00:13:25,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=876, Invalid=1880, Unknown=0, NotChecked=0, Total=2756 [2021-05-03 00:13:25,976 INFO L87 Difference]: Start difference. First operand 119 states and 122 transitions. Second operand has 51 states, 51 states have (on average 1.6862745098039216) internal successors, (86), 50 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:13:26,645 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-03 00:13:27,143 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:13:27,689 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:13:28,210 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:13:28,735 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:13:29,266 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:13:29,785 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:13:30,282 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:13:30,755 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:13:31,194 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:13:31,659 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:13:32,187 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:13:32,715 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:13:33,266 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:13:33,840 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:13:34,378 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:13:34,949 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:13:35,508 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:13:36,097 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:13:36,593 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:13:37,165 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:13:37,744 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:13:38,295 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:13:38,840 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:13:39,407 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:13:39,968 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:13:40,505 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:13:41,011 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:13:41,524 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:13:42,024 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:13:42,590 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:13:42,764 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:13:42,944 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:13:43,119 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:13:43,286 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:13:43,493 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:13:43,694 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:13:43,910 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:13:44,123 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:13:44,333 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:13:44,560 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:13:44,799 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:13:45,040 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:13:45,301 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:13:45,559 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:13:45,801 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:13:46,051 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:13:46,312 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:13:47,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:13:47,147 INFO L93 Difference]: Finished difference Result 179 states and 187 transitions. [2021-05-03 00:13:47,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-03 00:13:47,148 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.6862745098039216) internal successors, (86), 50 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 118 [2021-05-03 00:13:47,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:13:47,148 INFO L225 Difference]: With dead ends: 179 [2021-05-03 00:13:47,148 INFO L226 Difference]: Without dead ends: 122 [2021-05-03 00:13:47,149 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 62 SyntacticMatches, 6 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2939 ImplicationChecksByTransitivity, 20313.4ms TimeCoverageRelationStatistics Valid=2542, Invalid=7558, Unknown=0, NotChecked=0, Total=10100 [2021-05-03 00:13:47,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-05-03 00:13:47,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2021-05-03 00:13:47,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 117 states have (on average 1.0341880341880343) internal successors, (121), 117 states have internal predecessors, (121), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:13:47,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 125 transitions. [2021-05-03 00:13:47,157 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 125 transitions. Word has length 118 [2021-05-03 00:13:47,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:13:47,157 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 125 transitions. [2021-05-03 00:13:47,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 1.6862745098039216) internal successors, (86), 50 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:13:47,157 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 125 transitions. [2021-05-03 00:13:47,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-05-03 00:13:47,157 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:13:47,157 INFO L523 BasicCegarLoop]: trace histogram [45, 29, 19, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:13:47,157 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2021-05-03 00:13:47,157 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:13:47,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:13:47,158 INFO L82 PathProgramCache]: Analyzing trace with hash 2061712997, now seen corresponding path program 36 times [2021-05-03 00:13:47,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:13:47,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [349885697] [2021-05-03 00:13:47,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:13:47,191 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_992 50000) InVars {main_~x~0=v_main_~x~0_992} OutVars{main_~x~0=v_main_~x~0_992} AuxVars[] AssignedVars[] [2021-05-03 00:13:47,193 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-03 00:13:47,194 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:13:47,219 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:13:47,316 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-03 00:13:47,424 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_994 1000000) (<= 50000 v_main_~x~0_994)) InVars {main_~x~0=v_main_~x~0_994} OutVars{main_~x~0=v_main_~x~0_994} AuxVars[] AssignedVars[] [2021-05-03 00:13:47,426 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:13:47,427 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:13:47,428 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:13:47,457 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:13:47,468 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:13:47,595 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:13:47,744 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-05-03 00:13:47,746 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:13:47,752 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50000 v_main_~x~0_996) (< v_main_~x~0_996 999998)) InVars {main_~x~0=v_main_~x~0_996} OutVars{main_~x~0=v_main_~x~0_996} AuxVars[] AssignedVars[] [2021-05-03 00:13:47,754 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:13:47,754 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:13:47,756 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:13:47,788 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:13:47,800 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:13:47,957 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:13:48,103 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:13:48,106 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_998 999999) (< v_main_~x~0_998 50000)) InVars {main_~x~0=v_main_~x~0_998} OutVars{main_~x~0=v_main_~x~0_998} AuxVars[] AssignedVars[] [2021-05-03 00:13:48,107 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size [2021-05-03 00:13:48,107 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:13:48,129 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:13:48,214 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size 47 [2021-05-03 00:13:48,303 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:13:48,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:13:50,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:13:50,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:13:50,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:13:50,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:13:50,999 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 14 [2021-05-03 00:14:01,075 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:14:01,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [349885697] [2021-05-03 00:14:01,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [349885697] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:14:01,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:14:01,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2021-05-03 00:14:01,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634844778] [2021-05-03 00:14:01,076 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-05-03 00:14:01,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:14:01,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-05-03 00:14:01,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=2745, Unknown=0, NotChecked=0, Total=3080 [2021-05-03 00:14:01,077 INFO L87 Difference]: Start difference. First operand 122 states and 125 transitions. Second operand has 53 states, 53 states have (on average 1.679245283018868) internal successors, (89), 52 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:14:01,900 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-03 00:14:02,744 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:14:03,611 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:14:04,432 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:14:05,279 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:14:06,164 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:14:07,029 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:14:07,890 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:14:08,693 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:14:09,521 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:14:10,423 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:14:11,301 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:14:12,246 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:14:13,179 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:14:14,079 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:14:14,978 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:14:15,873 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:14:16,771 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:14:17,751 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:14:18,690 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:14:19,612 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:14:20,506 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:14:21,328 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:14:22,230 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:14:23,099 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:14:23,956 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:14:24,824 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:14:25,638 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:14:26,513 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:14:27,421 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:14:29,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:14:29,570 INFO L93 Difference]: Finished difference Result 182 states and 189 transitions. [2021-05-03 00:14:29,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 00:14:29,571 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.679245283018868) internal successors, (89), 52 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 121 [2021-05-03 00:14:29,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:14:29,572 INFO L225 Difference]: With dead ends: 182 [2021-05-03 00:14:29,572 INFO L226 Difference]: Without dead ends: 124 [2021-05-03 00:14:29,573 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 62 SyntacticMatches, 6 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1346 ImplicationChecksByTransitivity, 24486.9ms TimeCoverageRelationStatistics Valid=486, Invalid=6824, Unknown=0, NotChecked=0, Total=7310 [2021-05-03 00:14:29,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-05-03 00:14:29,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2021-05-03 00:14:29,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 119 states have (on average 1.0336134453781514) internal successors, (123), 119 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:14:29,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 127 transitions. [2021-05-03 00:14:29,580 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 127 transitions. Word has length 121 [2021-05-03 00:14:29,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:14:29,581 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 127 transitions. [2021-05-03 00:14:29,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 1.679245283018868) internal successors, (89), 52 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:14:29,581 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 127 transitions. [2021-05-03 00:14:29,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-05-03 00:14:29,581 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:14:29,581 INFO L523 BasicCegarLoop]: trace histogram [46, 30, 19, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:14:29,581 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2021-05-03 00:14:29,581 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:14:29,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:14:29,582 INFO L82 PathProgramCache]: Analyzing trace with hash 98040898, now seen corresponding path program 37 times [2021-05-03 00:14:29,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:14:29,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1053407037] [2021-05-03 00:14:29,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:14:29,615 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_1032 50000) InVars {main_~x~0=v_main_~x~0_1032} OutVars{main_~x~0=v_main_~x~0_1032} AuxVars[] AssignedVars[] [2021-05-03 00:14:29,616 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-03 00:14:29,653 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:14:29,674 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:14:29,705 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-03 00:14:29,793 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_1034 1000000) (<= 50000 v_main_~x~0_1034)) InVars {main_~x~0=v_main_~x~0_1034} OutVars{main_~x~0=v_main_~x~0_1034} AuxVars[] AssignedVars[] [2021-05-03 00:14:29,794 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:14:29,795 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:14:29,797 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:14:29,819 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:14:29,829 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:14:29,945 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:14:30,077 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:14:30,078 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:14:30,083 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_1036 999998) (<= 50000 v_main_~x~0_1036)) InVars {main_~x~0=v_main_~x~0_1036} OutVars{main_~x~0=v_main_~x~0_1036} AuxVars[] AssignedVars[] [2021-05-03 00:14:30,085 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:14:30,086 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:14:30,087 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:14:30,114 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:14:30,125 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:14:30,251 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:14:30,378 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:14:30,380 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_1038 999999) (< v_main_~x~0_1038 50000)) InVars {main_~x~0=v_main_~x~0_1038} OutVars{main_~x~0=v_main_~x~0_1038} AuxVars[] AssignedVars[] [2021-05-03 00:14:30,381 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size [2021-05-03 00:14:30,414 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:14:30,433 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:14:30,462 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size 47 [2021-05-03 00:14:30,537 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:14:30,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:14:30,759 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 14 [2021-05-03 00:14:33,076 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-05-03 00:14:33,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:14:33,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:14:33,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:14:33,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:14:33,289 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 14 [2021-05-03 00:14:33,524 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 10 [2021-05-03 00:14:40,644 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:14:40,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1053407037] [2021-05-03 00:14:40,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1053407037] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:14:40,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:14:40,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2021-05-03 00:14:40,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58378527] [2021-05-03 00:14:40,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-05-03 00:14:40,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:14:40,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-05-03 00:14:40,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=973, Invalid=2107, Unknown=0, NotChecked=0, Total=3080 [2021-05-03 00:14:40,645 INFO L87 Difference]: Start difference. First operand 124 states and 127 transitions. Second operand has 54 states, 54 states have (on average 1.6851851851851851) internal successors, (91), 53 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:14:41,202 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-03 00:14:41,810 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:14:42,471 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:14:43,130 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:14:43,781 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:14:44,420 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:14:45,037 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:14:45,654 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:14:46,275 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:14:46,854 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:14:47,457 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:14:48,094 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:14:48,748 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:14:49,375 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:14:49,949 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:14:50,527 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:14:51,088 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:14:51,665 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:14:52,295 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:14:52,907 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:14:53,517 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:14:54,155 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:14:54,794 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:14:55,409 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:14:56,024 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:14:56,644 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:14:57,236 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:14:57,867 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:14:58,469 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:14:59,092 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:14:59,683 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:15:00,227 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:15:00,718 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:15:00,885 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:15:01,081 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:15:01,274 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:15:01,505 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:15:01,765 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:15:02,018 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:15:02,305 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:15:02,574 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:15:02,858 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:15:03,123 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:15:03,399 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:15:03,725 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:15:04,055 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:15:04,359 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:15:04,689 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:15:05,000 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:15:05,337 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:15:05,691 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:15:06,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:15:06,205 INFO L93 Difference]: Finished difference Result 185 states and 193 transitions. [2021-05-03 00:15:06,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-03 00:15:06,206 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.6851851851851851) internal successors, (91), 53 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 123 [2021-05-03 00:15:06,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:15:06,207 INFO L225 Difference]: With dead ends: 185 [2021-05-03 00:15:06,207 INFO L226 Difference]: Without dead ends: 127 [2021-05-03 00:15:06,208 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 64 SyntacticMatches, 6 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3301 ImplicationChecksByTransitivity, 24740.5ms TimeCoverageRelationStatistics Valid=2829, Invalid=8513, Unknown=0, NotChecked=0, Total=11342 [2021-05-03 00:15:06,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-05-03 00:15:06,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-05-03 00:15:06,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.0327868852459017) internal successors, (126), 122 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) [2021-05-03 00:15:06,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 130 transitions. [2021-05-03 00:15:06,217 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 130 transitions. Word has length 123 [2021-05-03 00:15:06,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:15:06,217 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 130 transitions. [2021-05-03 00:15:06,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 1.6851851851851851) internal successors, (91), 53 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:15:06,217 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 130 transitions. [2021-05-03 00:15:06,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-05-03 00:15:06,218 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:15:06,218 INFO L523 BasicCegarLoop]: trace histogram [47, 31, 20, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:15:06,218 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2021-05-03 00:15:06,218 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:15:06,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:15:06,218 INFO L82 PathProgramCache]: Analyzing trace with hash 773875812, now seen corresponding path program 38 times [2021-05-03 00:15:06,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:15:06,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [750161605] [2021-05-03 00:15:06,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:15:06,255 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_1073 50000) InVars {main_~x~0=v_main_~x~0_1073} OutVars{main_~x~0=v_main_~x~0_1073} AuxVars[] AssignedVars[] [2021-05-03 00:15:06,257 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-03 00:15:06,301 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:15:06,330 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:15:06,368 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-03 00:15:06,477 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50000 v_main_~x~0_1075) (< v_main_~x~0_1075 1000000)) InVars {main_~x~0=v_main_~x~0_1075} OutVars{main_~x~0=v_main_~x~0_1075} AuxVars[] AssignedVars[] [2021-05-03 00:15:06,479 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:15:06,480 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:15:06,482 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:15:06,515 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:15:06,525 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:15:06,688 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:15:06,878 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 00:15:06,880 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:15:06,889 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50000 v_main_~x~0_1077) (< v_main_~x~0_1077 999998)) InVars {main_~x~0=v_main_~x~0_1077} OutVars{main_~x~0=v_main_~x~0_1077} AuxVars[] AssignedVars[] [2021-05-03 00:15:06,891 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:15:06,892 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:15:06,894 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:15:06,934 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:15:06,949 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:15:07,129 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:15:07,323 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:15:07,326 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_1079 50000) (< v_main_~x~0_1079 999999)) InVars {main_~x~0=v_main_~x~0_1079} OutVars{main_~x~0=v_main_~x~0_1079} AuxVars[] AssignedVars[] [2021-05-03 00:15:07,327 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size [2021-05-03 00:15:07,377 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:15:07,406 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:15:07,457 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size 47 [2021-05-03 00:15:07,568 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-05-03 00:15:07,570 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:15:07,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:07,787 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-05-03 00:15:07,922 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-05-03 00:15:10,875 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-05-03 00:15:10,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:15:10,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:10,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:15:10,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:15:11,092 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 14 [2021-05-03 00:15:24,673 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:15:24,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [750161605] [2021-05-03 00:15:24,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [750161605] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:15:24,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:15:24,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2021-05-03 00:15:24,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941067047] [2021-05-03 00:15:24,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-05-03 00:15:24,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:15:24,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-05-03 00:15:24,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=3059, Unknown=0, NotChecked=0, Total=3422 [2021-05-03 00:15:24,675 INFO L87 Difference]: Start difference. First operand 127 states and 130 transitions. Second operand has 56 states, 56 states have (on average 1.6785714285714286) internal successors, (94), 55 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:15:25,888 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-03 00:15:27,005 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:15:28,124 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:15:29,291 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:15:30,361 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:15:31,351 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:15:32,478 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:15:33,594 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:15:34,695 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:15:35,803 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:15:36,918 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:15:38,063 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:15:39,267 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:15:40,407 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:15:41,439 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:15:42,531 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:15:43,632 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:15:44,700 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:15:45,779 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:15:46,866 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:15:48,003 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:15:49,221 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:15:50,410 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:15:51,623 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:15:52,867 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:15:53,959 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:15:55,078 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:15:56,194 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:15:57,290 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:15:58,562 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:15:59,818 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:16:00,954 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:16:03,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:16:03,742 INFO L93 Difference]: Finished difference Result 188 states and 195 transitions. [2021-05-03 00:16:03,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-03 00:16:03,742 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.6785714285714286) internal successors, (94), 55 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 126 [2021-05-03 00:16:03,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:16:03,743 INFO L225 Difference]: With dead ends: 188 [2021-05-03 00:16:03,743 INFO L226 Difference]: Without dead ends: 129 [2021-05-03 00:16:03,744 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 64 SyntacticMatches, 6 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1496 ImplicationChecksByTransitivity, 32938.6ms TimeCoverageRelationStatistics Valid=524, Invalid=7666, Unknown=0, NotChecked=0, Total=8190 [2021-05-03 00:16:03,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-03 00:16:03,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-05-03 00:16:03,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.032258064516129) internal successors, (128), 124 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) [2021-05-03 00:16:03,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 132 transitions. [2021-05-03 00:16:03,757 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 132 transitions. Word has length 126 [2021-05-03 00:16:03,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:16:03,758 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 132 transitions. [2021-05-03 00:16:03,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 56 states, 56 states have (on average 1.6785714285714286) internal successors, (94), 55 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:16:03,758 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 132 transitions. [2021-05-03 00:16:03,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-05-03 00:16:03,759 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:16:03,759 INFO L523 BasicCegarLoop]: trace histogram [48, 32, 20, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:16:03,759 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2021-05-03 00:16:03,759 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:16:03,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:16:03,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1488506023, now seen corresponding path program 39 times [2021-05-03 00:16:03,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:16:03,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [149059836] [2021-05-03 00:16:03,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:16:03,799 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_1115 50000) InVars {main_~x~0=v_main_~x~0_1115} OutVars{main_~x~0=v_main_~x~0_1115} AuxVars[] AssignedVars[] [2021-05-03 00:16:03,801 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-03 00:16:03,850 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:16:03,878 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:16:03,919 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-03 00:16:04,029 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-05-03 00:16:04,042 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50000 v_main_~x~0_1117) (< v_main_~x~0_1117 1000000)) InVars {main_~x~0=v_main_~x~0_1117} OutVars{main_~x~0=v_main_~x~0_1117} AuxVars[] AssignedVars[] [2021-05-03 00:16:04,044 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:16:04,105 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:16:04,107 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:16:04,143 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:16:04,157 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:16:04,256 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:16:04,433 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-05-03 00:16:04,435 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:16:04,442 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50000 v_main_~x~0_1119) (< v_main_~x~0_1119 999998)) InVars {main_~x~0=v_main_~x~0_1119} OutVars{main_~x~0=v_main_~x~0_1119} AuxVars[] AssignedVars[] [2021-05-03 00:16:04,443 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:16:04,444 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:16:04,446 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:16:04,481 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:16:04,497 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:16:04,678 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:16:04,856 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:16:04,858 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_1121 999999) (< v_main_~x~0_1121 50000)) InVars {main_~x~0=v_main_~x~0_1121} OutVars{main_~x~0=v_main_~x~0_1121} AuxVars[] AssignedVars[] [2021-05-03 00:16:04,860 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size [2021-05-03 00:16:04,910 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:16:04,937 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:16:04,979 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size 47 [2021-05-03 00:16:05,085 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-05-03 00:16:05,086 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:16:05,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:16:05,311 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 9 [2021-05-03 00:16:08,611 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-05-03 00:16:08,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:16:08,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:16:08,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:16:08,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:16:08,836 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 14 [2021-05-03 00:16:18,006 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:16:18,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [149059836] [2021-05-03 00:16:18,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [149059836] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:16:18,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:16:18,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2021-05-03 00:16:18,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292028141] [2021-05-03 00:16:18,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-05-03 00:16:18,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:16:18,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-05-03 00:16:18,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=2407, Unknown=0, NotChecked=0, Total=3540 [2021-05-03 00:16:18,009 INFO L87 Difference]: Start difference. First operand 129 states and 132 transitions. Second operand has 57 states, 57 states have (on average 1.6842105263157894) internal successors, (96), 56 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:16:18,771 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-03 00:16:19,413 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:16:20,075 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:16:20,700 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:16:21,245 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:16:21,799 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:16:22,444 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:16:23,054 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:16:23,680 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:16:24,282 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:16:24,925 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:16:25,567 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:16:26,197 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:16:26,853 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:16:27,522 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:16:28,125 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:16:28,790 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:16:29,401 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:16:30,051 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:16:30,666 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:16:31,281 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:16:31,913 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:16:32,571 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:16:33,259 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:16:33,964 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:16:34,632 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:16:35,235 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:16:35,876 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:16:36,536 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:16:37,235 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:16:37,944 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:16:38,628 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:16:39,336 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:16:39,922 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:16:40,486 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:16:40,684 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:16:40,874 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:16:41,074 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:16:41,268 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:16:41,498 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:16:41,720 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:16:41,941 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:16:42,147 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:16:42,409 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:16:42,640 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:16:42,873 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:16:43,109 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:16:43,345 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:16:43,603 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:16:43,857 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:16:44,118 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:16:44,377 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:16:44,658 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:16:44,928 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:16:45,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:16:45,312 INFO L93 Difference]: Finished difference Result 191 states and 199 transitions. [2021-05-03 00:16:45,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-03 00:16:45,313 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.6842105263157894) internal successors, (96), 56 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 128 [2021-05-03 00:16:45,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:16:45,313 INFO L225 Difference]: With dead ends: 191 [2021-05-03 00:16:45,313 INFO L226 Difference]: Without dead ends: 132 [2021-05-03 00:16:45,314 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 67 SyntacticMatches, 4 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3840 ImplicationChecksByTransitivity, 27960.7ms TimeCoverageRelationStatistics Valid=3222, Invalid=9660, Unknown=0, NotChecked=0, Total=12882 [2021-05-03 00:16:45,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-05-03 00:16:45,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2021-05-03 00:16:45,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 127 states have (on average 1.031496062992126) internal successors, (131), 127 states have internal predecessors, (131), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:16:45,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 135 transitions. [2021-05-03 00:16:45,322 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 135 transitions. Word has length 128 [2021-05-03 00:16:45,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:16:45,323 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 135 transitions. [2021-05-03 00:16:45,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 1.6842105263157894) internal successors, (96), 56 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:16:45,323 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 135 transitions. [2021-05-03 00:16:45,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-05-03 00:16:45,323 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:16:45,323 INFO L523 BasicCegarLoop]: trace histogram [49, 33, 21, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:16:45,323 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2021-05-03 00:16:45,323 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:16:45,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:16:45,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1669686151, now seen corresponding path program 40 times [2021-05-03 00:16:45,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:16:45,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [382903219] [2021-05-03 00:16:45,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:16:45,362 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_1158 50000) InVars {main_~x~0=v_main_~x~0_1158} OutVars{main_~x~0=v_main_~x~0_1158} AuxVars[] AssignedVars[] [2021-05-03 00:16:45,364 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-03 00:16:45,400 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:16:45,422 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:16:45,453 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-03 00:16:45,551 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_1160 1000000) (<= 50000 v_main_~x~0_1160)) InVars {main_~x~0=v_main_~x~0_1160} OutVars{main_~x~0=v_main_~x~0_1160} AuxVars[] AssignedVars[] [2021-05-03 00:16:45,553 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:16:45,554 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:16:45,555 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:16:45,585 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:16:45,597 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:16:45,727 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:16:45,860 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:16:45,861 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:16:45,867 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_1162 999998) (<= 50000 v_main_~x~0_1162)) InVars {main_~x~0=v_main_~x~0_1162} OutVars{main_~x~0=v_main_~x~0_1162} AuxVars[] AssignedVars[] [2021-05-03 00:16:45,869 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:16:45,919 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:16:45,920 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:16:45,948 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:16:45,958 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:16:46,033 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:16:46,167 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:16:46,169 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_1164 50000) (< v_main_~x~0_1164 999999)) InVars {main_~x~0=v_main_~x~0_1164} OutVars{main_~x~0=v_main_~x~0_1164} AuxVars[] AssignedVars[] [2021-05-03 00:16:46,170 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size [2021-05-03 00:16:46,204 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:16:46,223 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:16:46,252 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size 47 [2021-05-03 00:16:46,337 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:16:46,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:16:49,388 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-05-03 00:16:49,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:16:49,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:16:49,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:16:49,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:16:49,585 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 14 [2021-05-03 00:17:02,757 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:17:02,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [382903219] [2021-05-03 00:17:02,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [382903219] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:17:02,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:17:02,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2021-05-03 00:17:02,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540680060] [2021-05-03 00:17:02,758 INFO L460 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-05-03 00:17:02,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:17:02,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-05-03 00:17:02,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=3391, Unknown=0, NotChecked=0, Total=3782 [2021-05-03 00:17:02,759 INFO L87 Difference]: Start difference. First operand 132 states and 135 transitions. Second operand has 59 states, 59 states have (on average 1.6779661016949152) internal successors, (99), 58 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) [2021-05-03 00:17:03,645 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-03 00:17:04,523 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:17:05,411 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:17:06,340 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:17:07,287 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:17:08,255 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:17:09,155 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:17:10,041 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:17:10,826 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:17:11,612 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:17:12,429 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:17:13,225 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:17:14,077 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:17:14,968 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:17:15,803 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:17:16,674 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:17:17,542 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:17:18,457 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:17:19,317 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:17:20,152 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:17:20,926 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:17:21,688 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:17:22,604 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:17:23,481 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:17:24,343 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:17:25,250 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:17:26,094 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:17:27,040 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:17:27,991 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:17:28,915 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:17:29,734 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:17:30,485 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:17:31,244 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:17:32,027 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:17:34,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:17:34,128 INFO L93 Difference]: Finished difference Result 194 states and 201 transitions. [2021-05-03 00:17:34,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-03 00:17:34,129 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.6779661016949152) internal successors, (99), 58 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 131 [2021-05-03 00:17:34,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:17:34,130 INFO L225 Difference]: With dead ends: 194 [2021-05-03 00:17:34,130 INFO L226 Difference]: Without dead ends: 134 [2021-05-03 00:17:34,131 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 65 SyntacticMatches, 7 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1657 ImplicationChecksByTransitivity, 31560.9ms TimeCoverageRelationStatistics Valid=562, Invalid=8558, Unknown=0, NotChecked=0, Total=9120 [2021-05-03 00:17:34,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-05-03 00:17:34,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2021-05-03 00:17:34,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 129 states have (on average 1.0310077519379846) internal successors, (133), 129 states have internal predecessors, (133), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:17:34,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 137 transitions. [2021-05-03 00:17:34,144 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 137 transitions. Word has length 131 [2021-05-03 00:17:34,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:17:34,144 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 137 transitions. [2021-05-03 00:17:34,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 59 states, 59 states have (on average 1.6779661016949152) internal successors, (99), 58 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) [2021-05-03 00:17:34,144 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 137 transitions. [2021-05-03 00:17:34,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-05-03 00:17:34,145 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:17:34,145 INFO L523 BasicCegarLoop]: trace histogram [50, 34, 21, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:17:34,145 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2021-05-03 00:17:34,145 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:17:34,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:17:34,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1742039574, now seen corresponding path program 41 times [2021-05-03 00:17:34,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:17:34,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1863435535] [2021-05-03 00:17:34,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:17:34,184 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_1202 50000) InVars {main_~x~0=v_main_~x~0_1202} OutVars{main_~x~0=v_main_~x~0_1202} AuxVars[] AssignedVars[] [2021-05-03 00:17:34,185 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-03 00:17:34,186 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:17:34,211 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:17:34,303 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-03 00:17:34,406 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-05-03 00:17:34,420 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_1204 1000000) (<= 50000 v_main_~x~0_1204)) InVars {main_~x~0=v_main_~x~0_1204} OutVars{main_~x~0=v_main_~x~0_1204} AuxVars[] AssignedVars[] [2021-05-03 00:17:34,423 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:17:34,486 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:17:34,488 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:17:34,520 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:17:34,534 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:17:34,631 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:17:34,797 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:17:34,799 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:17:34,805 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_1206 999998) (<= 50000 v_main_~x~0_1206)) InVars {main_~x~0=v_main_~x~0_1206} OutVars{main_~x~0=v_main_~x~0_1206} AuxVars[] AssignedVars[] [2021-05-03 00:17:34,807 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:17:34,866 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:17:34,868 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:17:34,900 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:17:34,912 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:17:35,002 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:17:35,166 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 00:17:35,169 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_1208 999999) (< v_main_~x~0_1208 50000)) InVars {main_~x~0=v_main_~x~0_1208} OutVars{main_~x~0=v_main_~x~0_1208} AuxVars[] AssignedVars[] [2021-05-03 00:17:35,170 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size [2021-05-03 00:17:35,213 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:17:35,239 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:17:35,279 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size 47 [2021-05-03 00:17:35,384 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-05-03 00:17:35,385 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:17:35,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:17:35,689 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 14 [2021-05-03 00:17:35,836 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2021-05-03 00:17:39,171 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-05-03 00:17:39,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:17:39,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:17:39,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:17:39,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:17:39,376 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 14 [2021-05-03 00:17:39,608 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 10 [2021-05-03 00:17:48,814 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:17:48,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1863435535] [2021-05-03 00:17:48,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1863435535] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:17:48,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:17:48,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2021-05-03 00:17:48,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161872744] [2021-05-03 00:17:48,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-05-03 00:17:48,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:17:48,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-05-03 00:17:48,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1182, Invalid=2600, Unknown=0, NotChecked=0, Total=3782 [2021-05-03 00:17:48,816 INFO L87 Difference]: Start difference. First operand 134 states and 137 transitions. Second operand has 60 states, 60 states have (on average 1.6833333333333333) internal successors, (101), 59 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) [2021-05-03 00:17:49,668 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-03 00:17:50,495 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:17:51,259 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:17:52,013 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:17:52,902 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:17:53,605 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:17:54,338 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:17:55,161 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:17:56,026 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:17:56,825 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:17:57,590 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:17:58,419 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:17:59,209 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:18:00,009 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:18:00,743 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:18:01,414 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:18:02,105 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:18:02,916 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:18:03,676 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:18:04,510 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:18:05,336 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:18:06,233 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:18:07,070 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:18:07,963 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:18:08,852 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:18:09,718 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:18:10,529 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:18:11,375 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:18:12,174 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:18:13,062 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:18:13,899 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:18:14,753 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:18:15,580 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:18:16,402 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:18:17,238 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:18:18,130 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:18:18,899 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:18:19,136 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:18:19,376 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:18:19,642 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:18:19,905 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:18:20,167 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:18:20,443 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:18:20,736 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:18:21,027 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:18:21,344 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:18:21,649 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:18:21,995 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:18:22,369 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:18:22,745 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:18:23,097 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:18:23,414 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:18:23,740 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:18:24,087 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:18:24,407 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:18:24,763 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:18:25,113 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:18:25,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:18:25,674 INFO L93 Difference]: Finished difference Result 197 states and 205 transitions. [2021-05-03 00:18:25,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-03 00:18:25,675 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.6833333333333333) internal successors, (101), 59 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 133 [2021-05-03 00:18:25,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:18:25,676 INFO L225 Difference]: With dead ends: 197 [2021-05-03 00:18:25,676 INFO L226 Difference]: Without dead ends: 137 [2021-05-03 00:18:25,678 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 70 SyntacticMatches, 4 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3998 ImplicationChecksByTransitivity, 33813.6ms TimeCoverageRelationStatistics Valid=3448, Invalid=10594, Unknown=0, NotChecked=0, Total=14042 [2021-05-03 00:18:25,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-05-03 00:18:25,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-05-03 00:18:25,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.0303030303030303) internal successors, (136), 132 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) [2021-05-03 00:18:25,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 140 transitions. [2021-05-03 00:18:25,699 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 140 transitions. Word has length 133 [2021-05-03 00:18:25,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:18:25,699 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 140 transitions. [2021-05-03 00:18:25,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 60 states, 60 states have (on average 1.6833333333333333) internal successors, (101), 59 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) [2021-05-03 00:18:25,699 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 140 transitions. [2021-05-03 00:18:25,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-05-03 00:18:25,699 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:18:25,700 INFO L523 BasicCegarLoop]: trace histogram [51, 35, 22, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:18:25,700 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2021-05-03 00:18:25,700 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:18:25,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:18:25,700 INFO L82 PathProgramCache]: Analyzing trace with hash 819170640, now seen corresponding path program 42 times [2021-05-03 00:18:25,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:18:25,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395207441] [2021-05-03 00:18:25,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:18:25,734 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_1247 50000) InVars {main_~x~0=v_main_~x~0_1247} OutVars{main_~x~0=v_main_~x~0_1247} AuxVars[] AssignedVars[] [2021-05-03 00:18:25,736 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-03 00:18:25,737 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:18:25,765 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:18:25,873 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-03 00:18:25,984 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-05-03 00:18:25,998 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_1249 1000000) (<= 50000 v_main_~x~0_1249)) InVars {main_~x~0=v_main_~x~0_1249} OutVars{main_~x~0=v_main_~x~0_1249} AuxVars[] AssignedVars[] [2021-05-03 00:18:26,000 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:18:26,063 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:18:26,065 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:18:26,100 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:18:26,115 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:18:26,219 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:18:26,401 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 00:18:26,403 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:18:26,419 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_1251 999998) (<= 50000 v_main_~x~0_1251)) InVars {main_~x~0=v_main_~x~0_1251} OutVars{main_~x~0=v_main_~x~0_1251} AuxVars[] AssignedVars[] [2021-05-03 00:18:26,421 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:18:26,422 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:18:26,424 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:18:26,460 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:18:26,474 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:18:26,650 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:18:26,806 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:18:26,809 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_1253 50000) (< v_main_~x~0_1253 999999)) InVars {main_~x~0=v_main_~x~0_1253} OutVars{main_~x~0=v_main_~x~0_1253} AuxVars[] AssignedVars[] [2021-05-03 00:18:26,810 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size [2021-05-03 00:18:26,856 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:18:26,883 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:18:26,919 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size 47 [2021-05-03 00:18:27,014 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:18:27,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:18:30,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:18:30,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:18:30,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:18:30,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:18:30,691 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 14 [2021-05-03 00:18:47,550 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:18:47,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395207441] [2021-05-03 00:18:47,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [395207441] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:18:47,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:18:47,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2021-05-03 00:18:47,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568703771] [2021-05-03 00:18:47,551 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-05-03 00:18:47,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:18:47,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-05-03 00:18:47,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=422, Invalid=3738, Unknown=0, NotChecked=0, Total=4160 [2021-05-03 00:18:47,552 INFO L87 Difference]: Start difference. First operand 137 states and 140 transitions. Second operand has 62 states, 62 states have (on average 1.6774193548387097) internal successors, (104), 61 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:18:48,977 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-03 00:18:50,188 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:18:51,301 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:18:52,505 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:18:53,726 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:18:54,996 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:18:56,066 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:18:57,182 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:18:58,298 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:18:59,352 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:19:00,449 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:19:01,477 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:19:02,674 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:19:03,929 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:19:05,105 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:19:06,386 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:19:07,705 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:19:08,983 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:19:10,265 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:19:11,557 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:19:12,853 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:19:14,243 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:19:15,760 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:19:17,038 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:19:18,491 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:19:19,821 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:19:21,097 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:19:22,473 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:19:23,647 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:19:24,846 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:19:26,059 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:19:27,248 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:19:28,514 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:19:29,776 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:19:30,835 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:19:31,960 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:19:35,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:19:35,363 INFO L93 Difference]: Finished difference Result 200 states and 207 transitions. [2021-05-03 00:19:35,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-03 00:19:35,365 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.6774193548387097) internal successors, (104), 61 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 136 [2021-05-03 00:19:35,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:19:35,365 INFO L225 Difference]: With dead ends: 200 [2021-05-03 00:19:35,365 INFO L226 Difference]: Without dead ends: 139 [2021-05-03 00:19:35,367 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 67 SyntacticMatches, 7 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1846 ImplicationChecksByTransitivity, 39742.2ms TimeCoverageRelationStatistics Valid=603, Invalid=9497, Unknown=0, NotChecked=0, Total=10100 [2021-05-03 00:19:35,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-05-03 00:19:35,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2021-05-03 00:19:35,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 134 states have (on average 1.0298507462686568) internal successors, (138), 134 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) [2021-05-03 00:19:35,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 142 transitions. [2021-05-03 00:19:35,376 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 142 transitions. Word has length 136 [2021-05-03 00:19:35,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:19:35,376 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 142 transitions. [2021-05-03 00:19:35,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 62 states, 62 states have (on average 1.6774193548387097) internal successors, (104), 61 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:19:35,377 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 142 transitions. [2021-05-03 00:19:35,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-05-03 00:19:35,377 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:19:35,377 INFO L523 BasicCegarLoop]: trace histogram [52, 36, 22, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:19:35,378 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2021-05-03 00:19:35,378 INFO L428 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:19:35,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:19:35,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1259977171, now seen corresponding path program 43 times [2021-05-03 00:19:35,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:19:35,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1218519690] [2021-05-03 00:19:35,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:19:35,429 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_1293 50000) InVars {main_~x~0=v_main_~x~0_1293} OutVars{main_~x~0=v_main_~x~0_1293} AuxVars[] AssignedVars[] [2021-05-03 00:19:35,431 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-03 00:19:35,492 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:19:35,527 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:19:35,578 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-03 00:19:35,709 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-05-03 00:19:35,725 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_1295 1000000) (<= 50000 v_main_~x~0_1295)) InVars {main_~x~0=v_main_~x~0_1295} OutVars{main_~x~0=v_main_~x~0_1295} AuxVars[] AssignedVars[] [2021-05-03 00:19:35,727 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:19:35,804 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:19:35,807 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:19:35,861 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:19:35,877 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:19:35,997 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:19:36,209 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:19:36,211 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:19:36,219 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_1297 999998) (<= 50000 v_main_~x~0_1297)) InVars {main_~x~0=v_main_~x~0_1297} OutVars{main_~x~0=v_main_~x~0_1297} AuxVars[] AssignedVars[] [2021-05-03 00:19:36,221 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:19:36,222 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:19:36,225 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:19:36,269 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:19:36,287 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:19:36,494 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:19:36,702 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 00:19:36,705 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_1299 999999) (< v_main_~x~0_1299 50000)) InVars {main_~x~0=v_main_~x~0_1299} OutVars{main_~x~0=v_main_~x~0_1299} AuxVars[] AssignedVars[] [2021-05-03 00:19:36,706 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size [2021-05-03 00:19:36,758 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:19:36,788 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:19:36,832 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size 47 [2021-05-03 00:19:36,957 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-05-03 00:19:36,958 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:19:36,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:19:40,714 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-05-03 00:19:40,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:19:40,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:19:40,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:19:40,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:19:40,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:19:44,229 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:19:44,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1218519690] [2021-05-03 00:19:44,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1218519690] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:19:44,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:19:44,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2021-05-03 00:19:44,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634536178] [2021-05-03 00:19:44,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-05-03 00:19:44,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:19:44,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-05-03 00:19:44,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=834, Invalid=1236, Unknown=0, NotChecked=0, Total=2070 [2021-05-03 00:19:44,232 INFO L87 Difference]: Start difference. First operand 139 states and 142 transitions. Second operand has 45 states, 45 states have (on average 1.4444444444444444) internal successors, (65), 44 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:19:44,837 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:19:45,574 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:19:46,120 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:19:46,685 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:19:47,250 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:19:47,834 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:19:48,445 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:19:49,053 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:19:49,675 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:19:50,151 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:19:50,646 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:19:51,129 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:19:51,579 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:19:52,083 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:19:52,702 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:19:53,227 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:19:53,739 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:19:54,285 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:19:54,507 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:19:54,745 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:19:54,967 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:19:55,223 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:19:55,496 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:19:55,760 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:19:56,016 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:19:56,293 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:19:56,585 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:19:56,850 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:19:57,100 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:19:57,380 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:19:57,700 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:19:58,009 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:19:58,330 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:19:58,723 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:19:59,081 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:19:59,417 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:19:59,770 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:20:00,147 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:20:00,481 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:20:00,822 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:20:01,153 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:20:01,511 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:20:02,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:20:02,195 INFO L93 Difference]: Finished difference Result 206 states and 218 transitions. [2021-05-03 00:20:02,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-03 00:20:02,196 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.4444444444444444) internal successors, (65), 44 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 138 [2021-05-03 00:20:02,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:20:02,197 INFO L225 Difference]: With dead ends: 206 [2021-05-03 00:20:02,197 INFO L226 Difference]: Without dead ends: 145 [2021-05-03 00:20:02,198 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2225 ImplicationChecksByTransitivity, 19904.8ms TimeCoverageRelationStatistics Valid=2472, Invalid=5184, Unknown=0, NotChecked=0, Total=7656 [2021-05-03 00:20:02,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-05-03 00:20:02,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-05-03 00:20:02,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.0285714285714285) internal successors, (144), 140 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) [2021-05-03 00:20:02,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 148 transitions. [2021-05-03 00:20:02,212 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 148 transitions. Word has length 138 [2021-05-03 00:20:02,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:20:02,212 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 148 transitions. [2021-05-03 00:20:02,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.4444444444444444) internal successors, (65), 44 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:20:02,212 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 148 transitions. [2021-05-03 00:20:02,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-05-03 00:20:02,213 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:20:02,213 INFO L523 BasicCegarLoop]: trace histogram [54, 36, 24, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:20:02,213 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2021-05-03 00:20:02,213 INFO L428 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:20:02,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:20:02,214 INFO L82 PathProgramCache]: Analyzing trace with hash 507815741, now seen corresponding path program 44 times [2021-05-03 00:20:02,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:20:02,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2100448484] [2021-05-03 00:20:02,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:20:02,261 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~x~0_1355 50000) InVars {main_~x~0=v_main_~x~0_1355} OutVars{main_~x~0=v_main_~x~0_1355} AuxVars[] AssignedVars[] [2021-05-03 00:20:02,262 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size [2021-05-03 00:20:02,327 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:20:02,367 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:20:02,414 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 92.2 percent of original size 47 [2021-05-03 00:20:02,555 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-05-03 00:20:02,573 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_1357 1000000) (<= 50000 v_main_~x~0_1357)) InVars {main_~x~0=v_main_~x~0_1357} OutVars{main_~x~0=v_main_~x~0_1357} AuxVars[] AssignedVars[] [2021-05-03 00:20:02,575 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:20:02,666 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:20:02,670 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:20:02,717 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:20:02,735 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:20:02,869 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:20:03,116 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:20:03,118 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:20:03,128 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50000 v_main_~x~0_1359) (< v_main_~x~0_1359 999998)) InVars {main_~x~0=v_main_~x~0_1359} OutVars{main_~x~0=v_main_~x~0_1359} AuxVars[] AssignedVars[] [2021-05-03 00:20:03,130 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:20:03,205 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:20:03,207 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:20:03,247 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:20:03,265 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-03 00:20:03,400 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:20:03,638 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 00:20:03,649 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_1361 999999) (< v_main_~x~0_1361 50000)) InVars {main_~x~0=v_main_~x~0_1361} OutVars{main_~x~0=v_main_~x~0_1361} AuxVars[] AssignedVars[] [2021-05-03 00:20:03,651 WARN L240 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size [2021-05-03 00:20:03,711 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:20:03,748 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:20:03,806 WARN L245 tifierPushTermWalker]: treesize reduction 25, result has 65.3 percent of original size 47 [2021-05-03 00:20:03,960 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-05-03 00:20:03,961 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:20:03,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:20:04,219 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-05-03 00:20:09,274 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-05-03 00:20:09,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:20:09,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:20:09,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:20:09,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:20:09,591 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 14 [2021-05-03 00:20:09,770 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-05-03 00:20:23,964 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:20:23,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2100448484] [2021-05-03 00:20:23,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2100448484] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:20:23,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:20:23,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2021-05-03 00:20:23,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581192149] [2021-05-03 00:20:23,965 INFO L460 AbstractCegarLoop]: Interpolant automaton has 65 states [2021-05-03 00:20:23,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:20:23,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-05-03 00:20:23,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=3069, Unknown=0, NotChecked=0, Total=4556 [2021-05-03 00:20:23,966 INFO L87 Difference]: Start difference. First operand 145 states and 148 transitions. Second operand has 65 states, 65 states have (on average 1.6615384615384616) internal successors, (108), 64 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:20:24,932 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-03 00:20:25,827 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:20:26,688 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:20:27,583 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:20:28,463 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:20:29,323 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:20:30,149 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:20:31,010 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:20:31,822 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:20:32,740 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:20:33,647 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:20:34,577 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:20:35,554 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:20:36,484 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:20:37,430 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:20:38,302 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:20:39,184 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:20:40,109 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:20:40,919 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:20:41,729 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:20:42,590 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:20:43,469 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:20:44,316 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:20:45,181 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:20:46,026 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:20:46,915 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:20:47,755 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:20:48,644 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:20:49,602 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:20:50,487 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:20:51,304 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:20:52,237 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:20:53,234 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:20:54,072 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:20:54,946 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:20:55,828 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:20:56,770 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 00:20:57,509 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:20:58,345 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:20:58,614 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:20:58,893 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:20:59,162 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:20:59,452 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:20:59,773 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:21:00,088 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:21:00,415 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:21:00,716 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:21:00,995 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:21:01,266 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:21:01,561 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 37