/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf -i ../../../trunk/examples/svcomp/loops/invert_string-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 04:47:07,474 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 04:47:07,477 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 04:47:07,514 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-24 04:47:07,527 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-24 04:47:07,528 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-24 04:47:07,530 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-24 04:47:07,531 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-24 04:47:07,532 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-24 04:47:07,533 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-24 04:47:07,543 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-24 04:47:07,545 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-24 04:47:07,547 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-24 04:47:07,549 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-24 04:47:07,550 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-24 04:47:07,551 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-24 04:47:07,556 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-24 04:47:07,572 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-24 04:47:07,573 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-24 04:47:07,573 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-24 04:47:07,574 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-24 04:47:07,587 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 04:47:07,588 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 04:47:07,589 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 04:47:07,590 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 04:47:07,590 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 04:47:07,590 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 04:47:07,590 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 04:47:07,590 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 04:47:07,591 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 04:47:07,591 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 04:47:07,591 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 04:47:07,591 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 04:47:07,591 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 04:47:07,591 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 04:47:07,592 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 04:47:07,592 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 04:47:07,592 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 04:47:07,592 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 04:47:07,593 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 04:47:07,593 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 04:47:07,593 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 04:47:07,593 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 04:47:07,593 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-24 04:47:07,594 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-24 04:47:07,968 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 04:47:08,003 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 04:47:08,005 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 04:47:08,007 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 04:47:08,008 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 04:47:08,009 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/invert_string-1.c [2021-02-24 04:47:08,088 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac0c6c0b8/11b2ae5b30af4771b0b31846988a5384/FLAGf5675deb2 [2021-02-24 04:47:08,655 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 04:47:08,656 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/invert_string-1.c [2021-02-24 04:47:08,665 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac0c6c0b8/11b2ae5b30af4771b0b31846988a5384/FLAGf5675deb2 [2021-02-24 04:47:09,017 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac0c6c0b8/11b2ae5b30af4771b0b31846988a5384 [2021-02-24 04:47:09,024 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 04:47:09,047 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 04:47:09,050 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 04:47:09,050 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 04:47:09,055 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 04:47:09,056 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:47:09" (1/1) ... [2021-02-24 04:47:09,058 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4860fb3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:09, skipping insertion in model container [2021-02-24 04:47:09,058 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:47:09" (1/1) ... [2021-02-24 04:47:09,069 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 04:47:09,091 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 04:47:09,291 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/invert_string-1.c[352,365] [2021-02-24 04:47:09,315 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:47:09,325 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 04:47:09,340 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/invert_string-1.c[352,365] [2021-02-24 04:47:09,350 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:47:09,370 INFO L208 MainTranslator]: Completed translation [2021-02-24 04:47:09,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:09 WrapperNode [2021-02-24 04:47:09,371 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 04:47:09,372 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 04:47:09,372 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 04:47:09,372 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 04:47:09,387 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:09" (1/1) ... [2021-02-24 04:47:09,387 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:09" (1/1) ... [2021-02-24 04:47:09,395 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:09" (1/1) ... [2021-02-24 04:47:09,396 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:09" (1/1) ... [2021-02-24 04:47:09,404 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:09" (1/1) ... [2021-02-24 04:47:09,410 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:09" (1/1) ... [2021-02-24 04:47:09,412 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:09" (1/1) ... [2021-02-24 04:47:09,415 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 04:47:09,416 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 04:47:09,416 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 04:47:09,416 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 04:47:09,417 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:09" (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 [2021-02-24 04:47:09,523 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 04:47:09,524 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 04:47:09,524 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 04:47:09,524 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-24 04:47:09,525 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 04:47:09,525 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 04:47:09,525 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 04:47:09,525 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 04:47:09,526 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 04:47:09,526 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-24 04:47:09,526 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-02-24 04:47:09,526 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-02-24 04:47:09,526 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 04:47:09,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 04:47:09,527 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 04:47:09,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 04:47:09,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 04:47:09,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 04:47:09,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 04:47:10,074 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 04:47:10,074 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-02-24 04:47:10,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:47:10 BoogieIcfgContainer [2021-02-24 04:47:10,077 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 04:47:10,079 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 04:47:10,080 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 04:47:10,083 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 04:47:10,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 04:47:09" (1/3) ... [2021-02-24 04:47:10,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f8858b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:47:10, skipping insertion in model container [2021-02-24 04:47:10,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:09" (2/3) ... [2021-02-24 04:47:10,086 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f8858b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:47:10, skipping insertion in model container [2021-02-24 04:47:10,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:47:10" (3/3) ... [2021-02-24 04:47:10,088 INFO L111 eAbstractionObserver]: Analyzing ICFG invert_string-1.c [2021-02-24 04:47:10,096 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 04:47:10,102 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 04:47:10,124 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 04:47:10,163 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 04:47:10,163 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 04:47:10,163 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-24 04:47:10,163 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 04:47:10,164 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 04:47:10,164 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 04:47:10,164 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 04:47:10,164 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 04:47:10,182 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states. [2021-02-24 04:47:10,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-24 04:47:10,194 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:47:10,195 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:47:10,195 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:47:10,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:47:10,202 INFO L82 PathProgramCache]: Analyzing trace with hash 56541078, now seen corresponding path program 1 times [2021-02-24 04:47:10,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:47:10,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [624455500] [2021-02-24 04:47:10,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:47:10,300 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:47:10,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:47:10,562 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:10,565 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:47:10,567 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:10,568 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:47:10,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:47:10,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:47:10,737 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:10,739 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:47:10,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 04:47:10,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [624455500] [2021-02-24 04:47:10,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:47:10,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-24 04:47:10,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183174544] [2021-02-24 04:47:10,769 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-24 04:47:10,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:47:10,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-24 04:47:10,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-24 04:47:10,791 INFO L87 Difference]: Start difference. First operand 72 states. Second operand 3 states. [2021-02-24 04:47:11,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:47:11,200 INFO L93 Difference]: Finished difference Result 127 states and 141 transitions. [2021-02-24 04:47:11,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-24 04:47:11,202 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 36 [2021-02-24 04:47:11,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:47:11,224 INFO L225 Difference]: With dead ends: 127 [2021-02-24 04:47:11,225 INFO L226 Difference]: Without dead ends: 62 [2021-02-24 04:47:11,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-24 04:47:11,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-02-24 04:47:11,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-02-24 04:47:11,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-02-24 04:47:11,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2021-02-24 04:47:11,313 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 36 [2021-02-24 04:47:11,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:47:11,314 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2021-02-24 04:47:11,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-24 04:47:11,314 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2021-02-24 04:47:11,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-24 04:47:11,316 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:47:11,316 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:47:11,317 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 04:47:11,317 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:47:11,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:47:11,319 INFO L82 PathProgramCache]: Analyzing trace with hash -221059569, now seen corresponding path program 1 times [2021-02-24 04:47:11,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:47:11,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1447567662] [2021-02-24 04:47:11,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:47:11,335 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:47:11,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:47:11,453 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:11,454 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:47:11,455 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:11,456 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:47:11,470 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:11,471 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:47:11,486 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:11,487 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:47:11,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:47:11,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:47:11,556 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:11,557 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:47:11,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 04:47:11,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1447567662] [2021-02-24 04:47:11,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:47:11,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-24 04:47:11,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631962229] [2021-02-24 04:47:11,578 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-24 04:47:11,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:47:11,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-24 04:47:11,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-24 04:47:11,580 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 5 states. [2021-02-24 04:47:11,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:47:11,973 INFO L93 Difference]: Finished difference Result 112 states and 117 transitions. [2021-02-24 04:47:11,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-24 04:47:11,974 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2021-02-24 04:47:11,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:47:11,978 INFO L225 Difference]: With dead ends: 112 [2021-02-24 04:47:11,978 INFO L226 Difference]: Without dead ends: 79 [2021-02-24 04:47:11,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-02-24 04:47:11,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-02-24 04:47:11,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 63. [2021-02-24 04:47:11,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-02-24 04:47:12,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2021-02-24 04:47:12,000 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 36 [2021-02-24 04:47:12,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:47:12,001 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2021-02-24 04:47:12,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-24 04:47:12,001 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2021-02-24 04:47:12,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-02-24 04:47:12,003 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:47:12,003 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:47:12,003 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 04:47:12,003 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:47:12,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:47:12,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1628001064, now seen corresponding path program 1 times [2021-02-24 04:47:12,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:47:12,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1182515190] [2021-02-24 04:47:12,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:47:12,030 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:12,046 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-02-24 04:47:12,053 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:12,057 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-02-24 04:47:12,075 WARN L141 QuantifierPusher]: treesize reduction 4, result has 83.3 percent of original size [2021-02-24 04:47:12,088 INFO L723 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2021-02-24 04:47:12,093 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:12,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:47:12,102 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:12,109 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-02-24 04:47:12,113 WARN L147 QuantifierPusher]: treesize reduction 4, result has 83.3 percent of original size 20 [2021-02-24 04:47:12,120 WARN L141 QuantifierPusher]: treesize reduction 14, result has 78.1 percent of original size [2021-02-24 04:47:12,124 WARN L147 QuantifierPusher]: treesize reduction 14, result has 78.1 percent of original size 50 [2021-02-24 04:47:12,125 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-02-24 04:47:12,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:47:12,187 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:12,188 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:47:12,189 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:12,190 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 04:47:12,197 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:12,198 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:47:12,206 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:12,207 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:47:12,223 WARN L141 QuantifierPusher]: treesize reduction 8, result has 11.1 percent of original size [2021-02-24 04:47:12,224 WARN L147 QuantifierPusher]: treesize reduction 8, result has 11.1 percent of original size 1 [2021-02-24 04:47:12,225 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:12,226 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:47:12,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:47:12,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:47:12,287 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:12,288 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:47:12,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 04:47:12,295 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:12,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:47:12,301 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:12,303 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-24 04:47:12,304 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-02-24 04:47:12,307 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:12,308 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:47:12,323 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:12,324 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-24 04:47:12,350 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:12,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:47:12,352 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:12,353 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-24 04:47:12,354 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-02-24 04:47:12,396 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:12,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:47:12,399 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:12,400 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-24 04:47:12,402 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-24 04:47:12,407 WARN L860 $PredicateComparison]: unable to prove that (and (< c_main_~i~0 c_main_~MAX~0) (exists ((|v_main_#t~nondet9_9| Int) (|v_#memory_int_19| (Array Int (Array Int Int)))) (and (<= |v_main_#t~nondet9_9| 127) (<= 0 (+ |v_main_#t~nondet9_9| 128)) (= |c_#memory_int| (store |v_#memory_int_19| |c_main_~#str1~0.base| (store (select |v_#memory_int_19| |c_main_~#str1~0.base|) (+ |c_main_~#str1~0.offset| c_main_~i~0) |v_main_#t~nondet9_9|)))))) is different from true [2021-02-24 04:47:12,409 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:12,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:47:12,412 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:12,413 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-24 04:47:12,414 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-02-24 04:47:12,455 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:12,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:47:12,461 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:12,462 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-24 04:47:12,464 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-02-24 04:47:12,508 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:12,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:47:12,514 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:12,515 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-02-24 04:47:12,517 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-02-24 04:47:12,522 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((|v_main_#t~nondet9_9| Int) (|v_#memory_int_19| (Array Int (Array Int Int)))) (and (<= |v_main_#t~nondet9_9| 127) (= |c_#memory_int| (store |v_#memory_int_19| |c_main_~#str1~0.base| (store (select |v_#memory_int_19| |c_main_~#str1~0.base|) (+ |c_main_~#str1~0.offset| c_main_~i~0 (- 1)) |v_main_#t~nondet9_9|))) (<= 0 (+ |v_main_#t~nondet9_9| 128)))) (< c_main_~i~0 (+ c_main_~MAX~0 1))) is different from true [2021-02-24 04:47:12,523 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:12,524 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-24 04:47:12,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1182515190] [2021-02-24 04:47:12,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:47:12,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-02-24 04:47:12,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940986044] [2021-02-24 04:47:12,527 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-24 04:47:12,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:47:12,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-24 04:47:12,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=86, Unknown=3, NotChecked=38, Total=156 [2021-02-24 04:47:12,529 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 13 states. [2021-02-24 04:47:12,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:47:12,936 INFO L93 Difference]: Finished difference Result 93 states and 96 transitions. [2021-02-24 04:47:12,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-24 04:47:12,937 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 43 [2021-02-24 04:47:12,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:47:12,939 INFO L225 Difference]: With dead ends: 93 [2021-02-24 04:47:12,939 INFO L226 Difference]: Without dead ends: 72 [2021-02-24 04:47:12,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=122, Unknown=3, NotChecked=46, Total=210 [2021-02-24 04:47:12,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-02-24 04:47:12,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 64. [2021-02-24 04:47:12,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-02-24 04:47:12,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2021-02-24 04:47:12,957 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 43 [2021-02-24 04:47:12,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:47:12,957 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2021-02-24 04:47:12,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-02-24 04:47:12,958 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2021-02-24 04:47:12,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-24 04:47:12,959 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:47:12,960 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:47:12,960 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-24 04:47:12,960 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:47:12,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:47:12,961 INFO L82 PathProgramCache]: Analyzing trace with hash -398128882, now seen corresponding path program 1 times [2021-02-24 04:47:12,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:47:12,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1427420260] [2021-02-24 04:47:12,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:47:12,969 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:12,973 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-02-24 04:47:12,976 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:12,981 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-02-24 04:47:13,015 WARN L141 QuantifierPusher]: treesize reduction 4, result has 83.3 percent of original size [2021-02-24 04:47:13,018 INFO L723 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2021-02-24 04:47:13,020 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:13,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:47:13,023 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:13,027 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-02-24 04:47:13,029 WARN L147 QuantifierPusher]: treesize reduction 4, result has 83.3 percent of original size 20 [2021-02-24 04:47:13,034 WARN L141 QuantifierPusher]: treesize reduction 14, result has 78.1 percent of original size [2021-02-24 04:47:13,037 WARN L147 QuantifierPusher]: treesize reduction 14, result has 78.1 percent of original size 50 [2021-02-24 04:47:13,038 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-02-24 04:47:13,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:47:13,327 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:13,328 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:47:13,329 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:13,330 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:47:13,339 WARN L141 QuantifierPusher]: treesize reduction 21, result has 56.3 percent of original size [2021-02-24 04:47:13,340 WARN L147 QuantifierPusher]: treesize reduction 21, result has 56.3 percent of original size 27 [2021-02-24 04:47:13,352 WARN L141 QuantifierPusher]: treesize reduction 52, result has 45.8 percent of original size [2021-02-24 04:47:13,354 WARN L147 QuantifierPusher]: treesize reduction 52, result has 45.8 percent of original size 44 [2021-02-24 04:47:13,402 WARN L141 QuantifierPusher]: treesize reduction 39, result has 72.7 percent of original size [2021-02-24 04:47:13,407 WARN L147 QuantifierPusher]: treesize reduction 39, result has 72.7 percent of original size 104 [2021-02-24 04:47:13,606 WARN L202 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 26 [2021-02-24 04:47:13,613 WARN L141 QuantifierPusher]: treesize reduction 52, result has 62.0 percent of original size [2021-02-24 04:47:13,617 WARN L147 QuantifierPusher]: treesize reduction 52, result has 62.0 percent of original size 85 [2021-02-24 04:47:13,727 WARN L141 QuantifierPusher]: treesize reduction 51, result has 68.5 percent of original size [2021-02-24 04:47:13,730 WARN L147 QuantifierPusher]: treesize reduction 51, result has 68.5 percent of original size 111 [2021-02-24 04:47:13,890 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-02-24 04:47:13,898 WARN L141 QuantifierPusher]: treesize reduction 51, result has 65.3 percent of original size [2021-02-24 04:47:13,903 WARN L147 QuantifierPusher]: treesize reduction 51, result has 65.3 percent of original size 96 [2021-02-24 04:47:14,047 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-02-24 04:47:14,052 WARN L141 QuantifierPusher]: treesize reduction 41, result has 64.7 percent of original size [2021-02-24 04:47:14,054 WARN L147 QuantifierPusher]: treesize reduction 41, result has 64.7 percent of original size 75 [2021-02-24 04:47:14,205 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-02-24 04:47:14,216 WARN L141 QuantifierPusher]: treesize reduction 41, result has 64.7 percent of original size [2021-02-24 04:47:14,219 WARN L147 QuantifierPusher]: treesize reduction 41, result has 64.7 percent of original size 75 [2021-02-24 04:47:14,350 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-02-24 04:47:14,355 WARN L141 QuantifierPusher]: treesize reduction 41, result has 64.7 percent of original size [2021-02-24 04:47:14,361 WARN L147 QuantifierPusher]: treesize reduction 41, result has 64.7 percent of original size 75 [2021-02-24 04:47:14,489 WARN L141 QuantifierPusher]: treesize reduction 46, result has 57.8 percent of original size [2021-02-24 04:47:14,491 WARN L147 QuantifierPusher]: treesize reduction 46, result has 57.8 percent of original size 63 [2021-02-24 04:47:14,558 WARN L141 QuantifierPusher]: treesize reduction 62, result has 69.8 percent of original size [2021-02-24 04:47:14,562 WARN L147 QuantifierPusher]: treesize reduction 62, result has 69.8 percent of original size 143 [2021-02-24 04:47:14,698 WARN L141 QuantifierPusher]: treesize reduction 108, result has 60.0 percent of original size [2021-02-24 04:47:14,702 WARN L147 QuantifierPusher]: treesize reduction 108, result has 60.0 percent of original size 162 [2021-02-24 04:47:14,835 WARN L141 QuantifierPusher]: treesize reduction 51, result has 71.7 percent of original size [2021-02-24 04:47:14,838 WARN L147 QuantifierPusher]: treesize reduction 51, result has 71.7 percent of original size 129 [2021-02-24 04:47:14,951 WARN L141 QuantifierPusher]: treesize reduction 31, result has 75.6 percent of original size [2021-02-24 04:47:14,956 WARN L147 QuantifierPusher]: treesize reduction 31, result has 75.6 percent of original size 96 [2021-02-24 04:47:15,055 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:15,056 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:47:15,075 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:15,076 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:47:15,104 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:15,105 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:47:15,127 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:15,130 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:47:15,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:47:15,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:47:15,216 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:15,217 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:47:15,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 04:47:15,236 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:15,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:47:15,240 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:15,242 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-24 04:47:15,242 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-02-24 04:47:15,246 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:15,247 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:47:15,284 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:15,287 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-24 04:47:15,340 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:15,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:47:15,343 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:15,344 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-24 04:47:15,345 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-24 04:47:15,427 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:15,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:47:15,430 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:15,431 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-24 04:47:15,432 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-02-24 04:47:15,510 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:15,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:47:15,512 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:15,513 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-24 04:47:15,515 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-02-24 04:47:15,593 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:15,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:47:15,598 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:15,599 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-24 04:47:15,600 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-02-24 04:47:15,676 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:15,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:47:15,680 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:15,681 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-02-24 04:47:15,682 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-02-24 04:47:15,762 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:15,763 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:47:15,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1427420260] [2021-02-24 04:47:15,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:47:15,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-02-24 04:47:15,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785444270] [2021-02-24 04:47:15,765 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-24 04:47:15,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:47:15,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-24 04:47:15,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=590, Unknown=10, NotChecked=0, Total=702 [2021-02-24 04:47:15,766 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 27 states. [2021-02-24 04:47:16,687 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-02-24 04:47:16,972 WARN L202 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2021-02-24 04:47:17,143 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-02-24 04:47:17,593 WARN L202 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-02-24 04:47:17,810 WARN L202 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-02-24 04:47:19,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:47:19,009 INFO L93 Difference]: Finished difference Result 109 states and 113 transitions. [2021-02-24 04:47:19,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-02-24 04:47:19,010 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 53 [2021-02-24 04:47:19,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:47:19,012 INFO L225 Difference]: With dead ends: 109 [2021-02-24 04:47:19,012 INFO L226 Difference]: Without dead ends: 107 [2021-02-24 04:47:19,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=290, Invalid=1728, Unknown=52, NotChecked=0, Total=2070 [2021-02-24 04:47:19,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-02-24 04:47:19,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2021-02-24 04:47:19,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2021-02-24 04:47:19,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2021-02-24 04:47:19,035 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 53 [2021-02-24 04:47:19,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:47:19,036 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2021-02-24 04:47:19,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-02-24 04:47:19,036 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2021-02-24 04:47:19,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-02-24 04:47:19,037 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:47:19,038 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:47:19,038 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-24 04:47:19,038 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:47:19,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:47:19,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1503336308, now seen corresponding path program 2 times [2021-02-24 04:47:19,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:47:19,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988476428] [2021-02-24 04:47:19,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:47:19,045 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:19,048 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-02-24 04:47:19,050 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:19,053 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-02-24 04:47:19,066 WARN L141 QuantifierPusher]: treesize reduction 4, result has 83.3 percent of original size [2021-02-24 04:47:19,067 INFO L723 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2021-02-24 04:47:19,070 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:19,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:47:19,072 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:19,075 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-02-24 04:47:19,076 WARN L147 QuantifierPusher]: treesize reduction 4, result has 83.3 percent of original size 20 [2021-02-24 04:47:19,080 WARN L141 QuantifierPusher]: treesize reduction 14, result has 78.1 percent of original size [2021-02-24 04:47:19,082 WARN L147 QuantifierPusher]: treesize reduction 14, result has 78.1 percent of original size 50 [2021-02-24 04:47:19,083 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-02-24 04:47:19,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:47:19,279 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:19,280 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:47:19,281 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:19,281 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:47:19,287 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:19,288 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:47:19,289 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:19,290 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:47:19,302 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:19,303 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-24 04:47:19,327 WARN L141 QuantifierPusher]: treesize reduction 15, result has 79.5 percent of original size [2021-02-24 04:47:19,330 WARN L147 QuantifierPusher]: treesize reduction 15, result has 79.5 percent of original size 58 [2021-02-24 04:47:19,391 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:19,392 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-24 04:47:19,393 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:19,394 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-24 04:47:19,425 WARN L141 QuantifierPusher]: treesize reduction 82, result has 51.2 percent of original size [2021-02-24 04:47:19,428 WARN L147 QuantifierPusher]: treesize reduction 82, result has 51.2 percent of original size 86 [2021-02-24 04:47:19,509 WARN L141 QuantifierPusher]: treesize reduction 82, result has 51.2 percent of original size [2021-02-24 04:47:19,511 WARN L147 QuantifierPusher]: treesize reduction 82, result has 51.2 percent of original size 86 [2021-02-24 04:47:19,608 WARN L141 QuantifierPusher]: treesize reduction 82, result has 51.2 percent of original size [2021-02-24 04:47:19,610 WARN L147 QuantifierPusher]: treesize reduction 82, result has 51.2 percent of original size 86 [2021-02-24 04:47:19,730 WARN L141 QuantifierPusher]: treesize reduction 82, result has 50.6 percent of original size [2021-02-24 04:47:19,733 WARN L147 QuantifierPusher]: treesize reduction 82, result has 50.6 percent of original size 84 [2021-02-24 04:47:19,838 WARN L141 QuantifierPusher]: treesize reduction 50, result has 72.5 percent of original size [2021-02-24 04:47:19,843 WARN L147 QuantifierPusher]: treesize reduction 50, result has 72.5 percent of original size 132 [2021-02-24 04:47:20,020 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 24 [2021-02-24 04:47:20,028 WARN L141 QuantifierPusher]: treesize reduction 42, result has 80.6 percent of original size [2021-02-24 04:47:20,033 WARN L147 QuantifierPusher]: treesize reduction 42, result has 80.6 percent of original size 175 [2021-02-24 04:47:20,251 WARN L202 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 26 [2021-02-24 04:47:20,253 WARN L141 QuantifierPusher]: treesize reduction 9, result has 71.9 percent of original size [2021-02-24 04:47:20,254 WARN L147 QuantifierPusher]: treesize reduction 9, result has 71.9 percent of original size 23 [2021-02-24 04:47:20,304 WARN L141 QuantifierPusher]: treesize reduction 9, result has 71.9 percent of original size [2021-02-24 04:47:20,306 WARN L147 QuantifierPusher]: treesize reduction 9, result has 71.9 percent of original size 23 [2021-02-24 04:47:20,359 WARN L141 QuantifierPusher]: treesize reduction 9, result has 71.9 percent of original size [2021-02-24 04:47:20,362 WARN L147 QuantifierPusher]: treesize reduction 9, result has 71.9 percent of original size 23 [2021-02-24 04:47:20,418 WARN L141 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-02-24 04:47:20,419 WARN L147 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size 21 [2021-02-24 04:47:20,477 WARN L141 QuantifierPusher]: treesize reduction 21, result has 70.0 percent of original size [2021-02-24 04:47:20,479 WARN L147 QuantifierPusher]: treesize reduction 21, result has 70.0 percent of original size 49 [2021-02-24 04:47:20,572 WARN L141 QuantifierPusher]: treesize reduction 23, result has 70.1 percent of original size [2021-02-24 04:47:20,575 WARN L147 QuantifierPusher]: treesize reduction 23, result has 70.1 percent of original size 54 [2021-02-24 04:47:20,676 WARN L141 QuantifierPusher]: treesize reduction 21, result has 68.2 percent of original size [2021-02-24 04:47:20,678 WARN L147 QuantifierPusher]: treesize reduction 21, result has 68.2 percent of original size 45 [2021-02-24 04:47:20,769 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:20,770 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:47:20,817 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:20,818 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:47:20,845 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:20,846 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:47:20,874 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:20,875 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:47:20,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:47:20,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:47:20,950 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:20,951 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:47:20,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 04:47:20,975 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:20,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:47:20,980 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:20,981 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-24 04:47:20,983 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-02-24 04:47:20,987 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:20,988 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:47:21,037 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:21,038 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-24 04:47:21,103 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:21,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:47:21,105 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:21,106 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-24 04:47:21,107 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-24 04:47:21,207 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:21,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:47:21,211 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:21,213 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-24 04:47:21,214 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-02-24 04:47:21,318 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:21,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:47:21,320 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:21,320 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-24 04:47:21,322 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-02-24 04:47:21,412 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:21,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:47:21,418 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:21,419 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-24 04:47:21,420 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-02-24 04:47:21,515 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:21,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:47:21,522 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:21,523 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-02-24 04:47:21,529 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-02-24 04:47:21,637 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:21,638 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:47:21,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988476428] [2021-02-24 04:47:21,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:47:21,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-02-24 04:47:21,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122610959] [2021-02-24 04:47:21,640 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-24 04:47:21,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:47:21,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-24 04:47:21,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=806, Unknown=18, NotChecked=0, Total=930 [2021-02-24 04:47:21,642 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand 31 states. [2021-02-24 04:47:24,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:47:24,684 INFO L93 Difference]: Finished difference Result 115 states and 119 transitions. [2021-02-24 04:47:24,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-02-24 04:47:24,685 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 63 [2021-02-24 04:47:24,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:47:24,688 INFO L225 Difference]: With dead ends: 115 [2021-02-24 04:47:24,688 INFO L226 Difference]: Without dead ends: 113 [2021-02-24 04:47:24,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=302, Invalid=2385, Unknown=69, NotChecked=0, Total=2756 [2021-02-24 04:47:24,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-02-24 04:47:24,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 94. [2021-02-24 04:47:24,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2021-02-24 04:47:24,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2021-02-24 04:47:24,712 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 63 [2021-02-24 04:47:24,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:47:24,713 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2021-02-24 04:47:24,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-02-24 04:47:24,713 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2021-02-24 04:47:24,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-02-24 04:47:24,714 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:47:24,715 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:47:24,715 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-24 04:47:24,715 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:47:24,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:47:24,716 INFO L82 PathProgramCache]: Analyzing trace with hash 600609810, now seen corresponding path program 1 times [2021-02-24 04:47:24,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:47:24,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62155340] [2021-02-24 04:47:24,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:47:24,723 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:24,725 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-02-24 04:47:24,727 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:24,730 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-02-24 04:47:24,742 WARN L141 QuantifierPusher]: treesize reduction 4, result has 83.3 percent of original size [2021-02-24 04:47:24,743 INFO L723 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2021-02-24 04:47:24,746 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:24,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:47:24,748 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:24,753 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-02-24 04:47:24,756 WARN L147 QuantifierPusher]: treesize reduction 4, result has 83.3 percent of original size 20 [2021-02-24 04:47:24,759 WARN L141 QuantifierPusher]: treesize reduction 14, result has 78.1 percent of original size [2021-02-24 04:47:24,762 WARN L147 QuantifierPusher]: treesize reduction 14, result has 78.1 percent of original size 50 [2021-02-24 04:47:24,762 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-02-24 04:47:24,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:47:24,807 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:24,808 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:47:24,809 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:24,810 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 04:47:24,816 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:24,817 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 04:47:24,826 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:24,827 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 04:47:24,837 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:24,838 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:47:24,850 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:24,850 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:47:24,870 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:24,871 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:47:24,890 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:24,891 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:47:24,904 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:24,905 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:47:24,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:47:24,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:47:24,961 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:24,961 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:47:24,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-02-24 04:47:24,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:47:24,966 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:24,967 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:47:24,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 04:47:24,976 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:24,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:47:24,983 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:24,984 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-24 04:47:24,985 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-02-24 04:47:24,987 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:24,987 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:47:25,007 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:25,008 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-24 04:47:25,039 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:25,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:47:25,041 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:25,041 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-24 04:47:25,042 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-02-24 04:47:25,087 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:25,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:47:25,090 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:25,092 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-24 04:47:25,093 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-24 04:47:25,098 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((|v_#memory_int_37| (Array Int (Array Int Int))) (|v_main_#t~nondet9_27| Int)) (and (<= 0 (+ |v_main_#t~nondet9_27| 128)) (<= |v_main_#t~nondet9_27| 127) (= (store |v_#memory_int_37| |c_main_~#str1~0.base| (store (select |v_#memory_int_37| |c_main_~#str1~0.base|) (+ |c_main_~#str1~0.offset| c_main_~i~0) |v_main_#t~nondet9_27|)) |c_#memory_int|))) (< c_main_~i~0 c_main_~MAX~0)) is different from true [2021-02-24 04:47:25,099 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:25,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:47:25,102 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:25,103 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-24 04:47:25,104 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-02-24 04:47:25,157 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:25,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:47:25,161 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:25,163 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-24 04:47:25,164 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-02-24 04:47:25,211 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:25,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:47:25,215 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:25,216 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-02-24 04:47:25,218 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-02-24 04:47:25,223 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((|v_#memory_int_37| (Array Int (Array Int Int))) (|v_main_#t~nondet9_27| Int)) (and (<= 0 (+ |v_main_#t~nondet9_27| 128)) (= |c_#memory_int| (store |v_#memory_int_37| |c_main_~#str1~0.base| (store (select |v_#memory_int_37| |c_main_~#str1~0.base|) (+ |c_main_~#str1~0.offset| c_main_~i~0 (- 1)) |v_main_#t~nondet9_27|))) (<= |v_main_#t~nondet9_27| 127))) (< c_main_~i~0 (+ c_main_~MAX~0 1))) is different from true [2021-02-24 04:47:25,224 WARN L141 QuantifierPusher]: treesize reduction 6, result has 14.3 percent of original size [2021-02-24 04:47:25,225 WARN L147 QuantifierPusher]: treesize reduction 6, result has 14.3 percent of original size 1 [2021-02-24 04:47:25,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62155340] [2021-02-24 04:47:25,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:47:25,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-02-24 04:47:25,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963297832] [2021-02-24 04:47:25,226 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-24 04:47:25,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:47:25,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-24 04:47:25,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=173, Unknown=3, NotChecked=54, Total=272 [2021-02-24 04:47:25,228 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand 17 states. [2021-02-24 04:47:25,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:47:25,854 INFO L93 Difference]: Finished difference Result 127 states and 132 transitions. [2021-02-24 04:47:25,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-24 04:47:25,855 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 69 [2021-02-24 04:47:25,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:47:25,858 INFO L225 Difference]: With dead ends: 127 [2021-02-24 04:47:25,858 INFO L226 Difference]: Without dead ends: 94 [2021-02-24 04:47:25,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=411, Unknown=3, NotChecked=86, Total=600 [2021-02-24 04:47:25,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-02-24 04:47:25,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-02-24 04:47:25,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2021-02-24 04:47:25,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 97 transitions. [2021-02-24 04:47:25,879 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 97 transitions. Word has length 69 [2021-02-24 04:47:25,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:47:25,880 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 97 transitions. [2021-02-24 04:47:25,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-02-24 04:47:25,880 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 97 transitions. [2021-02-24 04:47:25,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-02-24 04:47:25,881 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:47:25,882 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:47:25,882 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-24 04:47:25,882 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:47:25,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:47:25,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1817632346, now seen corresponding path program 3 times [2021-02-24 04:47:25,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:47:25,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [610261154] [2021-02-24 04:47:25,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:47:25,889 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:25,891 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-02-24 04:47:25,893 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:25,896 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-02-24 04:47:25,907 WARN L141 QuantifierPusher]: treesize reduction 4, result has 83.3 percent of original size [2021-02-24 04:47:25,908 INFO L723 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2021-02-24 04:47:25,910 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:25,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:47:25,911 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:25,914 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-02-24 04:47:25,915 WARN L147 QuantifierPusher]: treesize reduction 4, result has 83.3 percent of original size 20 [2021-02-24 04:47:25,918 WARN L141 QuantifierPusher]: treesize reduction 14, result has 78.1 percent of original size [2021-02-24 04:47:25,920 WARN L147 QuantifierPusher]: treesize reduction 14, result has 78.1 percent of original size 50 [2021-02-24 04:47:25,920 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-02-24 04:47:25,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:47:26,029 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:26,029 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:47:26,030 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:26,031 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:47:26,036 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:26,037 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:47:26,049 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:26,050 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-24 04:47:26,070 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:26,071 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-24 04:47:26,092 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:26,093 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-02-24 04:47:26,119 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:26,120 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-02-24 04:47:26,157 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:26,158 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-02-24 04:47:26,202 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:26,202 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-02-24 04:47:26,247 WARN L141 QuantifierPusher]: treesize reduction 14, result has 77.0 percent of original size [2021-02-24 04:47:26,249 WARN L147 QuantifierPusher]: treesize reduction 14, result has 77.0 percent of original size 47 [2021-02-24 04:47:26,354 WARN L141 QuantifierPusher]: treesize reduction 14, result has 77.0 percent of original size [2021-02-24 04:47:26,355 WARN L147 QuantifierPusher]: treesize reduction 14, result has 77.0 percent of original size 47 [2021-02-24 04:47:26,463 WARN L141 QuantifierPusher]: treesize reduction 14, result has 77.0 percent of original size [2021-02-24 04:47:26,466 WARN L147 QuantifierPusher]: treesize reduction 14, result has 77.0 percent of original size 47 [2021-02-24 04:47:26,570 WARN L141 QuantifierPusher]: treesize reduction 14, result has 76.3 percent of original size [2021-02-24 04:47:26,572 WARN L147 QuantifierPusher]: treesize reduction 14, result has 76.3 percent of original size 45 [2021-02-24 04:47:26,684 WARN L141 QuantifierPusher]: treesize reduction 14, result has 83.3 percent of original size [2021-02-24 04:47:26,688 WARN L147 QuantifierPusher]: treesize reduction 14, result has 83.3 percent of original size 70 [2021-02-24 04:47:26,816 WARN L141 QuantifierPusher]: treesize reduction 42, result has 81.8 percent of original size [2021-02-24 04:47:26,820 WARN L147 QuantifierPusher]: treesize reduction 42, result has 81.8 percent of original size 189 [2021-02-24 04:47:27,013 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 28 [2021-02-24 04:47:27,015 WARN L141 QuantifierPusher]: treesize reduction 43, result has 34.8 percent of original size [2021-02-24 04:47:27,016 WARN L147 QuantifierPusher]: treesize reduction 43, result has 34.8 percent of original size 23 [2021-02-24 04:47:27,074 WARN L141 QuantifierPusher]: treesize reduction 43, result has 34.8 percent of original size [2021-02-24 04:47:27,074 WARN L147 QuantifierPusher]: treesize reduction 43, result has 34.8 percent of original size 23 [2021-02-24 04:47:27,134 WARN L141 QuantifierPusher]: treesize reduction 43, result has 34.8 percent of original size [2021-02-24 04:47:27,136 WARN L147 QuantifierPusher]: treesize reduction 43, result has 34.8 percent of original size 23 [2021-02-24 04:47:27,202 WARN L141 QuantifierPusher]: treesize reduction 41, result has 33.9 percent of original size [2021-02-24 04:47:27,203 WARN L147 QuantifierPusher]: treesize reduction 41, result has 33.9 percent of original size 21 [2021-02-24 04:47:27,271 WARN L141 QuantifierPusher]: treesize reduction 95, result has 34.0 percent of original size [2021-02-24 04:47:27,272 WARN L147 QuantifierPusher]: treesize reduction 95, result has 34.0 percent of original size 49 [2021-02-24 04:47:27,385 WARN L141 QuantifierPusher]: treesize reduction 25, result has 68.4 percent of original size [2021-02-24 04:47:27,386 WARN L147 QuantifierPusher]: treesize reduction 25, result has 68.4 percent of original size 54 [2021-02-24 04:47:27,523 WARN L141 QuantifierPusher]: treesize reduction 23, result has 66.2 percent of original size [2021-02-24 04:47:27,524 WARN L147 QuantifierPusher]: treesize reduction 23, result has 66.2 percent of original size 45 [2021-02-24 04:47:27,623 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:27,624 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:47:27,652 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:27,653 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:47:27,688 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:27,689 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:47:27,721 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:27,722 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:47:27,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:47:27,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:47:27,826 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:27,827 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:47:27,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 04:47:27,858 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:27,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:47:27,861 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:27,862 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-24 04:47:27,862 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-02-24 04:47:27,865 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:27,866 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:47:27,926 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:27,927 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-24 04:47:27,997 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:27,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:47:27,998 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:27,998 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-24 04:47:27,999 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-24 04:47:28,088 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:28,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:47:28,090 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:28,091 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-24 04:47:28,091 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-02-24 04:47:28,214 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:28,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:47:28,216 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:28,216 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-24 04:47:28,217 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-02-24 04:47:28,335 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:28,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:47:28,340 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:28,340 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-24 04:47:28,341 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-02-24 04:47:28,460 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:28,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:47:28,464 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:28,465 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-02-24 04:47:28,466 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-02-24 04:47:28,584 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:28,584 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:47:28,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [610261154] [2021-02-24 04:47:28,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:47:28,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2021-02-24 04:47:28,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348165190] [2021-02-24 04:47:28,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-24 04:47:28,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:47:28,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-24 04:47:28,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=985, Unknown=22, NotChecked=0, Total=1122 [2021-02-24 04:47:28,587 INFO L87 Difference]: Start difference. First operand 94 states and 97 transitions. Second operand 34 states. [2021-02-24 04:47:32,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:47:32,768 INFO L93 Difference]: Finished difference Result 139 states and 144 transitions. [2021-02-24 04:47:32,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-02-24 04:47:32,770 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 73 [2021-02-24 04:47:32,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:47:32,771 INFO L225 Difference]: With dead ends: 139 [2021-02-24 04:47:32,772 INFO L226 Difference]: Without dead ends: 137 [2021-02-24 04:47:32,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=346, Invalid=3226, Unknown=88, NotChecked=0, Total=3660 [2021-02-24 04:47:32,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-02-24 04:47:32,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 104. [2021-02-24 04:47:32,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2021-02-24 04:47:32,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2021-02-24 04:47:32,796 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 73 [2021-02-24 04:47:32,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:47:32,796 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2021-02-24 04:47:32,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2021-02-24 04:47:32,796 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2021-02-24 04:47:32,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-02-24 04:47:32,798 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:47:32,798 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:47:32,798 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-24 04:47:32,798 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:47:32,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:47:32,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1762322824, now seen corresponding path program 2 times [2021-02-24 04:47:32,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:47:32,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [642274083] [2021-02-24 04:47:32,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:47:32,804 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:32,807 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-02-24 04:47:32,808 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:32,811 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-02-24 04:47:32,821 WARN L141 QuantifierPusher]: treesize reduction 4, result has 83.3 percent of original size [2021-02-24 04:47:32,822 INFO L723 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2021-02-24 04:47:32,824 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:32,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:47:32,826 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:32,828 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-02-24 04:47:32,829 WARN L147 QuantifierPusher]: treesize reduction 4, result has 83.3 percent of original size 20 [2021-02-24 04:47:32,831 WARN L141 QuantifierPusher]: treesize reduction 14, result has 78.1 percent of original size [2021-02-24 04:47:32,833 WARN L147 QuantifierPusher]: treesize reduction 14, result has 78.1 percent of original size 50 [2021-02-24 04:47:32,833 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-02-24 04:47:32,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 04:47:32,869 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 04:47:32,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 04:47:32,904 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 04:47:32,958 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-24 04:47:32,958 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-24 04:47:32,959 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-02-24 04:47:32,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 04:47:32 BoogieIcfgContainer [2021-02-24 04:47:32,987 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 04:47:32,988 INFO L168 Benchmark]: Toolchain (without parser) took 23954.63 ms. Allocated memory was 152.0 MB in the beginning and 219.2 MB in the end (delta: 67.1 MB). Free memory was 128.2 MB in the beginning and 82.6 MB in the end (delta: 45.5 MB). Peak memory consumption was 113.7 MB. Max. memory is 8.0 GB. [2021-02-24 04:47:32,988 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 152.0 MB. Free memory is still 126.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 04:47:32,991 INFO L168 Benchmark]: CACSL2BoogieTranslator took 321.37 ms. Allocated memory is still 152.0 MB. Free memory was 127.1 MB in the beginning and 117.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-24 04:47:32,992 INFO L168 Benchmark]: Boogie Preprocessor took 42.78 ms. Allocated memory is still 152.0 MB. Free memory was 117.1 MB in the beginning and 115.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-24 04:47:32,992 INFO L168 Benchmark]: RCFGBuilder took 661.41 ms. Allocated memory is still 152.0 MB. Free memory was 115.6 MB in the beginning and 131.6 MB in the end (delta: -16.0 MB). Peak memory consumption was 20.1 MB. Max. memory is 8.0 GB. [2021-02-24 04:47:32,992 INFO L168 Benchmark]: TraceAbstraction took 22907.76 ms. Allocated memory was 152.0 MB in the beginning and 219.2 MB in the end (delta: 67.1 MB). Free memory was 131.1 MB in the beginning and 82.6 MB in the end (delta: 48.5 MB). Peak memory consumption was 116.6 MB. Max. memory is 8.0 GB. [2021-02-24 04:47:32,993 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 152.0 MB. Free memory is still 126.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 321.37 ms. Allocated memory is still 152.0 MB. Free memory was 127.1 MB in the beginning and 117.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 42.78 ms. Allocated memory is still 152.0 MB. Free memory was 117.1 MB in the beginning and 115.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 661.41 ms. Allocated memory is still 152.0 MB. Free memory was 115.6 MB in the beginning and 131.6 MB in the end (delta: -16.0 MB). Peak memory consumption was 20.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 22907.76 ms. Allocated memory was 152.0 MB in the beginning and 219.2 MB in the end (delta: 67.1 MB). Free memory was 131.1 MB in the beginning and 82.6 MB in the end (delta: 48.5 MB). Peak memory consumption was 116.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 8]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L16] int MAX = __VERIFIER_nondet_uint(); [L17] COND FALSE !(!(MAX > 0)) [L18] char str1[MAX], str2[MAX]; [L19] int cont, i, j; [L20] cont = 0 [L22] i=0 [L22] COND TRUE i= 0 [L30] EXPR str1[0] [L30] str2[j] = str1[0] [L31] j++ [L29] i-- [L29] COND TRUE i >= 0 [L30] EXPR str1[0] [L30] str2[j] = str1[0] [L31] j++ [L29] i-- [L29] COND FALSE !(i >= 0) [L34] j = MAX-1 [L35] i=0 [L35] COND TRUE i