/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-b7b32d2 [2021-02-22 02:20:49,001 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-22 02:20:49,004 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-22 02:20:49,045 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-22 02:20:49,059 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-22 02:20:49,061 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-22 02:20:49,065 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-22 02:20:49,079 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-22 02:20:49,083 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-22 02:20:49,084 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-22 02:20:49,088 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-22 02:20:49,097 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-22 02:20:49,099 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-22 02:20:49,104 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-22 02:20:49,106 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-22 02:20:49,108 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-22 02:20:49,112 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-22 02:20:49,131 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-22 02:20:49,132 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-22 02:20:49,132 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-22 02:20:49,138 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-22 02:20:49,163 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-22 02:20:49,163 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-22 02:20:49,168 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-22 02:20:49,168 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-22 02:20:49,169 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-22 02:20:49,169 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-22 02:20:49,169 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-22 02:20:49,169 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-22 02:20:49,169 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-22 02:20:49,170 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-22 02:20:49,171 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-22 02:20:49,171 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-22 02:20:49,171 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-22 02:20:49,172 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-22 02:20:49,173 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-22 02:20:49,173 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-22 02:20:49,173 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-22 02:20:49,173 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-22 02:20:49,174 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 02:20:49,174 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-22 02:20:49,174 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-22 02:20:49,174 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-22 02:20:49,175 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-22 02:20:49,175 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-22 02:20:49,563 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-22 02:20:49,594 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-22 02:20:49,597 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-22 02:20:49,598 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-22 02:20:49,599 INFO L275 PluginConnector]: CDTParser initialized [2021-02-22 02:20:49,600 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/invert_string-1.c [2021-02-22 02:20:49,689 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/593ced1d0/e6c59f502d0f4135a00de832a6e18125/FLAG106b9b7e0 [2021-02-22 02:20:50,311 INFO L306 CDTParser]: Found 1 translation units. [2021-02-22 02:20:50,311 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/invert_string-1.c [2021-02-22 02:20:50,318 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/593ced1d0/e6c59f502d0f4135a00de832a6e18125/FLAG106b9b7e0 [2021-02-22 02:20:50,687 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/593ced1d0/e6c59f502d0f4135a00de832a6e18125 [2021-02-22 02:20:50,696 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-22 02:20:50,712 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-22 02:20:50,718 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-22 02:20:50,719 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-22 02:20:50,723 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-22 02:20:50,724 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:20:50" (1/1) ... [2021-02-22 02:20:50,726 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c6756ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:50, skipping insertion in model container [2021-02-22 02:20:50,726 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:20:50" (1/1) ... [2021-02-22 02:20:50,736 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-22 02:20:50,754 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-22 02:20:50,934 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] [2021-02-22 02:20:50,956 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:20:50,966 INFO L203 MainTranslator]: Completed pre-run [2021-02-22 02:20:50,981 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] [2021-02-22 02:20:50,991 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:20:51,009 INFO L208 MainTranslator]: Completed translation [2021-02-22 02:20:51,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:51 WrapperNode [2021-02-22 02:20:51,010 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-22 02:20:51,011 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-22 02:20:51,012 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-22 02:20:51,012 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-22 02:20:51,027 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:51" (1/1) ... [2021-02-22 02:20:51,027 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:51" (1/1) ... [2021-02-22 02:20:51,036 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:51" (1/1) ... [2021-02-22 02:20:51,037 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:51" (1/1) ... [2021-02-22 02:20:51,046 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:51" (1/1) ... [2021-02-22 02:20:51,051 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:51" (1/1) ... [2021-02-22 02:20:51,053 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:51" (1/1) ... [2021-02-22 02:20:51,056 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-22 02:20:51,057 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-22 02:20:51,057 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-22 02:20:51,057 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-22 02:20:51,059 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:51" (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 [2021-02-22 02:20:51,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-22 02:20:51,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-22 02:20:51,191 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-22 02:20:51,191 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-22 02:20:51,191 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-22 02:20:51,192 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-22 02:20:51,192 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-22 02:20:51,193 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-22 02:20:51,193 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-22 02:20:51,194 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-22 02:20:51,194 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-02-22 02:20:51,194 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-02-22 02:20:51,195 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-22 02:20:51,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-22 02:20:51,196 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-22 02:20:51,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-22 02:20:51,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-22 02:20:51,198 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-22 02:20:51,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-22 02:20:51,763 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-22 02:20:51,763 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-02-22 02:20:51,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:20:51 BoogieIcfgContainer [2021-02-22 02:20:51,766 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-22 02:20:51,767 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-22 02:20:51,768 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-22 02:20:51,771 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-22 02:20:51,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 02:20:50" (1/3) ... [2021-02-22 02:20:51,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f4899d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:20:51, skipping insertion in model container [2021-02-22 02:20:51,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:51" (2/3) ... [2021-02-22 02:20:51,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f4899d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:20:51, skipping insertion in model container [2021-02-22 02:20:51,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:20:51" (3/3) ... [2021-02-22 02:20:51,775 INFO L111 eAbstractionObserver]: Analyzing ICFG invert_string-1.c [2021-02-22 02:20:51,793 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-22 02:20:51,798 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-22 02:20:51,820 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-22 02:20:51,849 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-22 02:20:51,849 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-22 02:20:51,849 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-22 02:20:51,850 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-22 02:20:51,850 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-22 02:20:51,850 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-22 02:20:51,850 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-22 02:20:51,850 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-22 02:20:51,870 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states. [2021-02-22 02:20:51,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-22 02:20:51,882 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:20:51,883 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] [2021-02-22 02:20:51,884 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:20:51,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:20:51,891 INFO L82 PathProgramCache]: Analyzing trace with hash 56541078, now seen corresponding path program 1 times [2021-02-22 02:20:51,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:20:51,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1218963494] [2021-02-22 02:20:51,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:20:51,989 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:20:52,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:20:52,138 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:52,140 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:52,143 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:52,145 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:52,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:20:52,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:20:52,307 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:52,309 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:52,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:20:52,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1218963494] [2021-02-22 02:20:52,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:20:52,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-22 02:20:52,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887909125] [2021-02-22 02:20:52,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-22 02:20:52,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:20:52,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-22 02:20:52,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-22 02:20:52,367 INFO L87 Difference]: Start difference. First operand 72 states. Second operand 3 states. [2021-02-22 02:20:52,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:20:52,732 INFO L93 Difference]: Finished difference Result 127 states and 141 transitions. [2021-02-22 02:20:52,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-22 02:20:52,735 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 36 [2021-02-22 02:20:52,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:20:52,746 INFO L225 Difference]: With dead ends: 127 [2021-02-22 02:20:52,746 INFO L226 Difference]: Without dead ends: 62 [2021-02-22 02:20:52,750 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 [2021-02-22 02:20:52,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-02-22 02:20:52,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-02-22 02:20:52,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-02-22 02:20:52,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2021-02-22 02:20:52,810 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 36 [2021-02-22 02:20:52,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:20:52,811 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2021-02-22 02:20:52,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-22 02:20:52,812 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2021-02-22 02:20:52,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-22 02:20:52,814 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:20:52,814 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] [2021-02-22 02:20:52,814 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-22 02:20:52,815 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:20:52,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:20:52,816 INFO L82 PathProgramCache]: Analyzing trace with hash -221059569, now seen corresponding path program 1 times [2021-02-22 02:20:52,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:20:52,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1874099078] [2021-02-22 02:20:52,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:20:52,820 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:20:52,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:20:52,957 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:52,959 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:52,963 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:52,966 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:20:52,985 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:52,987 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:20:53,010 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:53,012 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:53,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:20:53,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:20:53,133 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:53,138 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:53,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:20:53,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1874099078] [2021-02-22 02:20:53,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:20:53,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-22 02:20:53,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552143975] [2021-02-22 02:20:53,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-22 02:20:53,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:20:53,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-22 02:20:53,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-22 02:20:53,152 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 5 states. [2021-02-22 02:20:53,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:20:53,635 INFO L93 Difference]: Finished difference Result 112 states and 117 transitions. [2021-02-22 02:20:53,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-22 02:20:53,636 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2021-02-22 02:20:53,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:20:53,639 INFO L225 Difference]: With dead ends: 112 [2021-02-22 02:20:53,640 INFO L226 Difference]: Without dead ends: 79 [2021-02-22 02:20:53,642 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 [2021-02-22 02:20:53,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-02-22 02:20:53,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 63. [2021-02-22 02:20:53,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-02-22 02:20:53,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2021-02-22 02:20:53,661 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 36 [2021-02-22 02:20:53,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:20:53,662 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2021-02-22 02:20:53,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-22 02:20:53,662 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2021-02-22 02:20:53,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-02-22 02:20:53,663 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:20:53,664 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] [2021-02-22 02:20:53,664 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-22 02:20:53,664 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:20:53,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:20:53,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1628001064, now seen corresponding path program 1 times [2021-02-22 02:20:53,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:20:53,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1012493870] [2021-02-22 02:20:53,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:20:53,691 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:53,708 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-02-22 02:20:53,716 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:53,720 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-02-22 02:20:53,741 WARN L141 QuantifierPusher]: treesize reduction 4, result has 83.3 percent of original size [2021-02-22 02:20:53,756 INFO L723 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2021-02-22 02:20:53,762 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:53,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:20:53,768 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:53,775 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-02-22 02:20:53,778 WARN L147 QuantifierPusher]: treesize reduction 4, result has 83.3 percent of original size 20 [2021-02-22 02:20:53,786 WARN L141 QuantifierPusher]: treesize reduction 14, result has 78.1 percent of original size [2021-02-22 02:20:53,790 WARN L147 QuantifierPusher]: treesize reduction 14, result has 78.1 percent of original size 50 [2021-02-22 02:20:53,791 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-02-22 02:20:53,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:20:53,850 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:53,851 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:53,852 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:53,853 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-22 02:20:53,860 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:53,861 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:20:53,870 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:53,871 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:20:53,889 WARN L141 QuantifierPusher]: treesize reduction 8, result has 11.1 percent of original size [2021-02-22 02:20:53,890 WARN L147 QuantifierPusher]: treesize reduction 8, result has 11.1 percent of original size 1 [2021-02-22 02:20:53,891 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:53,892 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:53,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:20:53,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:20:53,958 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:53,959 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:53,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:20:53,968 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:53,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:20:53,974 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:53,976 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-22 02:20:53,978 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-02-22 02:20:53,983 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:53,984 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:20:54,006 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:54,008 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-22 02:20:54,042 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:54,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:20:54,045 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:54,046 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:20:54,048 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-02-22 02:20:54,106 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:54,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:20:54,110 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:54,111 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-22 02:20:54,113 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-22 02:20:54,119 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 [2021-02-22 02:20:54,121 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:54,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:20:54,124 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:54,125 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-22 02:20:54,127 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-02-22 02:20:54,176 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:54,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:20:54,182 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:54,184 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-22 02:20:54,186 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-02-22 02:20:54,234 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:54,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:20:54,239 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:54,240 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-02-22 02:20:54,242 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-02-22 02:20:54,247 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 [2021-02-22 02:20:54,248 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:54,249 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-22 02:20:54,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1012493870] [2021-02-22 02:20:54,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:20:54,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-02-22 02:20:54,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409177587] [2021-02-22 02:20:54,252 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-22 02:20:54,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:20:54,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-22 02:20:54,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=86, Unknown=3, NotChecked=38, Total=156 [2021-02-22 02:20:54,254 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 13 states. [2021-02-22 02:20:54,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:20:54,730 INFO L93 Difference]: Finished difference Result 93 states and 96 transitions. [2021-02-22 02:20:54,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-22 02:20:54,732 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 43 [2021-02-22 02:20:54,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:20:54,733 INFO L225 Difference]: With dead ends: 93 [2021-02-22 02:20:54,733 INFO L226 Difference]: Without dead ends: 72 [2021-02-22 02:20:54,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=122, Unknown=3, NotChecked=46, Total=210 [2021-02-22 02:20:54,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-02-22 02:20:54,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 64. [2021-02-22 02:20:54,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-02-22 02:20:54,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2021-02-22 02:20:54,749 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 43 [2021-02-22 02:20:54,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:20:54,750 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2021-02-22 02:20:54,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-02-22 02:20:54,750 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2021-02-22 02:20:54,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-22 02:20:54,752 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:20:54,752 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] [2021-02-22 02:20:54,752 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-22 02:20:54,753 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:20:54,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:20:54,753 INFO L82 PathProgramCache]: Analyzing trace with hash -398128882, now seen corresponding path program 1 times [2021-02-22 02:20:54,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:20:54,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1921687514] [2021-02-22 02:20:54,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:20:54,761 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:54,764 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-02-22 02:20:54,766 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:54,770 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-02-22 02:20:54,783 WARN L141 QuantifierPusher]: treesize reduction 4, result has 83.3 percent of original size [2021-02-22 02:20:54,785 INFO L723 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2021-02-22 02:20:54,788 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:54,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:20:54,790 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:54,794 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-02-22 02:20:54,796 WARN L147 QuantifierPusher]: treesize reduction 4, result has 83.3 percent of original size 20 [2021-02-22 02:20:54,800 WARN L141 QuantifierPusher]: treesize reduction 14, result has 78.1 percent of original size [2021-02-22 02:20:54,803 WARN L147 QuantifierPusher]: treesize reduction 14, result has 78.1 percent of original size 50 [2021-02-22 02:20:54,804 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-02-22 02:20:54,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:20:55,097 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:55,098 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:55,100 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:55,102 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:20:55,119 WARN L141 QuantifierPusher]: treesize reduction 21, result has 56.3 percent of original size [2021-02-22 02:20:55,121 WARN L147 QuantifierPusher]: treesize reduction 21, result has 56.3 percent of original size 27 [2021-02-22 02:20:55,134 WARN L141 QuantifierPusher]: treesize reduction 52, result has 45.8 percent of original size [2021-02-22 02:20:55,136 WARN L147 QuantifierPusher]: treesize reduction 52, result has 45.8 percent of original size 44 [2021-02-22 02:20:55,176 WARN L141 QuantifierPusher]: treesize reduction 39, result has 72.7 percent of original size [2021-02-22 02:20:55,180 WARN L147 QuantifierPusher]: treesize reduction 39, result has 72.7 percent of original size 104 [2021-02-22 02:20:55,414 WARN L202 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 26 [2021-02-22 02:20:55,421 WARN L141 QuantifierPusher]: treesize reduction 52, result has 62.0 percent of original size [2021-02-22 02:20:55,425 WARN L147 QuantifierPusher]: treesize reduction 52, result has 62.0 percent of original size 85 [2021-02-22 02:20:55,549 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 20 [2021-02-22 02:20:55,555 WARN L141 QuantifierPusher]: treesize reduction 51, result has 68.5 percent of original size [2021-02-22 02:20:55,558 WARN L147 QuantifierPusher]: treesize reduction 51, result has 68.5 percent of original size 111 [2021-02-22 02:20:55,737 WARN L202 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-02-22 02:20:55,744 WARN L141 QuantifierPusher]: treesize reduction 51, result has 65.3 percent of original size [2021-02-22 02:20:55,747 WARN L147 QuantifierPusher]: treesize reduction 51, result has 65.3 percent of original size 96 [2021-02-22 02:20:55,905 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-02-22 02:20:55,910 WARN L141 QuantifierPusher]: treesize reduction 41, result has 64.7 percent of original size [2021-02-22 02:20:55,912 WARN L147 QuantifierPusher]: treesize reduction 41, result has 64.7 percent of original size 75 [2021-02-22 02:20:56,030 WARN L141 QuantifierPusher]: treesize reduction 41, result has 64.7 percent of original size [2021-02-22 02:20:56,033 WARN L147 QuantifierPusher]: treesize reduction 41, result has 64.7 percent of original size 75 [2021-02-22 02:20:56,171 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-02-22 02:20:56,193 WARN L141 QuantifierPusher]: treesize reduction 41, result has 64.7 percent of original size [2021-02-22 02:20:56,197 WARN L147 QuantifierPusher]: treesize reduction 41, result has 64.7 percent of original size 75 [2021-02-22 02:20:56,370 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-02-22 02:20:56,380 WARN L141 QuantifierPusher]: treesize reduction 46, result has 57.8 percent of original size [2021-02-22 02:20:56,385 WARN L147 QuantifierPusher]: treesize reduction 46, result has 57.8 percent of original size 63 [2021-02-22 02:20:56,464 WARN L141 QuantifierPusher]: treesize reduction 62, result has 69.8 percent of original size [2021-02-22 02:20:56,468 WARN L147 QuantifierPusher]: treesize reduction 62, result has 69.8 percent of original size 143 [2021-02-22 02:20:56,581 WARN L141 QuantifierPusher]: treesize reduction 108, result has 60.0 percent of original size [2021-02-22 02:20:56,585 WARN L147 QuantifierPusher]: treesize reduction 108, result has 60.0 percent of original size 162 [2021-02-22 02:20:56,731 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 24 [2021-02-22 02:20:56,739 WARN L141 QuantifierPusher]: treesize reduction 51, result has 71.7 percent of original size [2021-02-22 02:20:56,742 WARN L147 QuantifierPusher]: treesize reduction 51, result has 71.7 percent of original size 129 [2021-02-22 02:20:56,861 WARN L141 QuantifierPusher]: treesize reduction 31, result has 75.6 percent of original size [2021-02-22 02:20:56,863 WARN L147 QuantifierPusher]: treesize reduction 31, result has 75.6 percent of original size 96 [2021-02-22 02:20:56,974 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:56,975 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:20:56,994 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:56,995 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:20:57,016 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:57,017 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:20:57,047 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:57,049 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:57,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:20:57,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:20:57,135 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:57,136 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:57,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:20:57,178 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:57,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:20:57,189 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:57,191 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-22 02:20:57,193 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-02-22 02:20:57,197 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:57,199 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:20:57,239 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:57,240 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-22 02:20:57,301 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:57,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:20:57,303 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:57,304 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:20:57,305 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-22 02:20:57,399 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:57,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:20:57,406 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:57,408 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-22 02:20:57,410 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-02-22 02:20:57,516 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:57,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:20:57,519 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:57,522 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-22 02:20:57,523 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-02-22 02:20:57,600 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:57,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:20:57,605 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:57,607 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-22 02:20:57,608 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-02-22 02:20:57,692 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:57,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:20:57,699 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:57,700 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-02-22 02:20:57,701 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-02-22 02:20:57,786 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:57,786 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:57,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1921687514] [2021-02-22 02:20:57,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:20:57,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-02-22 02:20:57,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888719416] [2021-02-22 02:20:57,788 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-22 02:20:57,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:20:57,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-22 02:20:57,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=590, Unknown=10, NotChecked=0, Total=702 [2021-02-22 02:20:57,790 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 27 states. [2021-02-22 02:20:58,757 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-02-22 02:20:59,012 WARN L202 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2021-02-22 02:20:59,180 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-02-22 02:20:59,622 WARN L202 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-02-22 02:20:59,848 WARN L202 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-02-22 02:21:01,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:21:01,124 INFO L93 Difference]: Finished difference Result 109 states and 113 transitions. [2021-02-22 02:21:01,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-02-22 02:21:01,125 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 53 [2021-02-22 02:21:01,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:21:01,127 INFO L225 Difference]: With dead ends: 109 [2021-02-22 02:21:01,127 INFO L226 Difference]: Without dead ends: 107 [2021-02-22 02:21:01,129 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=290, Invalid=1728, Unknown=52, NotChecked=0, Total=2070 [2021-02-22 02:21:01,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-02-22 02:21:01,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2021-02-22 02:21:01,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2021-02-22 02:21:01,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2021-02-22 02:21:01,150 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 53 [2021-02-22 02:21:01,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:21:01,151 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2021-02-22 02:21:01,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-02-22 02:21:01,151 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2021-02-22 02:21:01,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-02-22 02:21:01,153 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:21:01,153 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] [2021-02-22 02:21:01,153 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-22 02:21:01,154 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:21:01,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:21:01,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1503336308, now seen corresponding path program 2 times [2021-02-22 02:21:01,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:21:01,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [527991618] [2021-02-22 02:21:01,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:21:01,161 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:01,164 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-02-22 02:21:01,166 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:01,169 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-02-22 02:21:01,182 WARN L141 QuantifierPusher]: treesize reduction 4, result has 83.3 percent of original size [2021-02-22 02:21:01,183 INFO L723 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2021-02-22 02:21:01,186 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:01,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:21:01,188 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:01,192 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-02-22 02:21:01,193 WARN L147 QuantifierPusher]: treesize reduction 4, result has 83.3 percent of original size 20 [2021-02-22 02:21:01,197 WARN L141 QuantifierPusher]: treesize reduction 14, result has 78.1 percent of original size [2021-02-22 02:21:01,199 WARN L147 QuantifierPusher]: treesize reduction 14, result has 78.1 percent of original size 50 [2021-02-22 02:21:01,200 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-02-22 02:21:01,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:01,404 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:01,405 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:01,407 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:01,407 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:21:01,414 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:01,417 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:21:01,420 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:01,421 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:21:01,434 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:01,439 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-22 02:21:01,462 WARN L141 QuantifierPusher]: treesize reduction 15, result has 79.5 percent of original size [2021-02-22 02:21:01,464 WARN L147 QuantifierPusher]: treesize reduction 15, result has 79.5 percent of original size 58 [2021-02-22 02:21:01,530 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:01,531 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-22 02:21:01,532 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:01,533 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-22 02:21:01,561 WARN L141 QuantifierPusher]: treesize reduction 82, result has 51.2 percent of original size [2021-02-22 02:21:01,564 WARN L147 QuantifierPusher]: treesize reduction 82, result has 51.2 percent of original size 86 [2021-02-22 02:21:01,663 WARN L141 QuantifierPusher]: treesize reduction 82, result has 51.2 percent of original size [2021-02-22 02:21:01,667 WARN L147 QuantifierPusher]: treesize reduction 82, result has 51.2 percent of original size 86 [2021-02-22 02:21:01,752 WARN L141 QuantifierPusher]: treesize reduction 82, result has 51.2 percent of original size [2021-02-22 02:21:01,755 WARN L147 QuantifierPusher]: treesize reduction 82, result has 51.2 percent of original size 86 [2021-02-22 02:21:01,852 WARN L141 QuantifierPusher]: treesize reduction 82, result has 50.6 percent of original size [2021-02-22 02:21:01,854 WARN L147 QuantifierPusher]: treesize reduction 82, result has 50.6 percent of original size 84 [2021-02-22 02:21:01,968 WARN L141 QuantifierPusher]: treesize reduction 50, result has 72.5 percent of original size [2021-02-22 02:21:01,972 WARN L147 QuantifierPusher]: treesize reduction 50, result has 72.5 percent of original size 132 [2021-02-22 02:21:02,123 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 24 [2021-02-22 02:21:02,129 WARN L141 QuantifierPusher]: treesize reduction 42, result has 80.6 percent of original size [2021-02-22 02:21:02,132 WARN L147 QuantifierPusher]: treesize reduction 42, result has 80.6 percent of original size 175 [2021-02-22 02:21:02,338 WARN L202 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 26 [2021-02-22 02:21:02,342 WARN L141 QuantifierPusher]: treesize reduction 9, result has 71.9 percent of original size [2021-02-22 02:21:02,348 WARN L147 QuantifierPusher]: treesize reduction 9, result has 71.9 percent of original size 23 [2021-02-22 02:21:02,386 WARN L141 QuantifierPusher]: treesize reduction 9, result has 71.9 percent of original size [2021-02-22 02:21:02,387 WARN L147 QuantifierPusher]: treesize reduction 9, result has 71.9 percent of original size 23 [2021-02-22 02:21:02,439 WARN L141 QuantifierPusher]: treesize reduction 9, result has 71.9 percent of original size [2021-02-22 02:21:02,442 WARN L147 QuantifierPusher]: treesize reduction 9, result has 71.9 percent of original size 23 [2021-02-22 02:21:02,496 WARN L141 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-02-22 02:21:02,497 WARN L147 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size 21 [2021-02-22 02:21:02,550 WARN L141 QuantifierPusher]: treesize reduction 21, result has 70.0 percent of original size [2021-02-22 02:21:02,553 WARN L147 QuantifierPusher]: treesize reduction 21, result has 70.0 percent of original size 49 [2021-02-22 02:21:02,652 WARN L141 QuantifierPusher]: treesize reduction 23, result has 70.1 percent of original size [2021-02-22 02:21:02,654 WARN L147 QuantifierPusher]: treesize reduction 23, result has 70.1 percent of original size 54 [2021-02-22 02:21:02,775 WARN L141 QuantifierPusher]: treesize reduction 21, result has 68.2 percent of original size [2021-02-22 02:21:02,781 WARN L147 QuantifierPusher]: treesize reduction 21, result has 68.2 percent of original size 45 [2021-02-22 02:21:02,900 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:02,901 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:21:02,930 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:02,931 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:21:02,962 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:02,963 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:21:02,997 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:02,998 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:03,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:21:03,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:03,093 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:03,094 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:03,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:21:03,112 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:03,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:21:03,129 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:03,130 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-22 02:21:03,131 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-02-22 02:21:03,135 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:03,137 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:21:03,187 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:03,188 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-22 02:21:03,262 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:03,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:21:03,264 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:03,265 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:03,266 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-22 02:21:03,368 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:03,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:21:03,372 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:03,373 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-22 02:21:03,375 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-02-22 02:21:03,470 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:03,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:21:03,472 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:03,472 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-22 02:21:03,476 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-02-22 02:21:03,566 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:03,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:21:03,570 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:03,572 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-22 02:21:03,573 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-02-22 02:21:03,673 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:03,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:21:03,683 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:03,684 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-02-22 02:21:03,690 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-02-22 02:21:03,790 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:03,791 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:03,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [527991618] [2021-02-22 02:21:03,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:21:03,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-02-22 02:21:03,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667297708] [2021-02-22 02:21:03,792 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-22 02:21:03,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:21:03,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-22 02:21:03,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=806, Unknown=18, NotChecked=0, Total=930 [2021-02-22 02:21:03,794 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand 31 states. [2021-02-22 02:21:06,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:21:06,956 INFO L93 Difference]: Finished difference Result 115 states and 119 transitions. [2021-02-22 02:21:06,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-02-22 02:21:06,957 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 63 [2021-02-22 02:21:06,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:21:06,961 INFO L225 Difference]: With dead ends: 115 [2021-02-22 02:21:06,961 INFO L226 Difference]: Without dead ends: 113 [2021-02-22 02:21:06,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=302, Invalid=2385, Unknown=69, NotChecked=0, Total=2756 [2021-02-22 02:21:06,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-02-22 02:21:06,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 94. [2021-02-22 02:21:06,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2021-02-22 02:21:06,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2021-02-22 02:21:06,985 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 63 [2021-02-22 02:21:06,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:21:06,986 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2021-02-22 02:21:06,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-02-22 02:21:06,986 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2021-02-22 02:21:06,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-02-22 02:21:06,987 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:21:06,988 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] [2021-02-22 02:21:06,988 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-22 02:21:06,988 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:21:06,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:21:06,989 INFO L82 PathProgramCache]: Analyzing trace with hash 600609810, now seen corresponding path program 1 times [2021-02-22 02:21:06,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:21:06,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [959383828] [2021-02-22 02:21:06,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:21:06,995 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:06,997 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-02-22 02:21:06,999 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:07,002 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-02-22 02:21:07,014 WARN L141 QuantifierPusher]: treesize reduction 4, result has 83.3 percent of original size [2021-02-22 02:21:07,016 INFO L723 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2021-02-22 02:21:07,018 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:07,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:21:07,019 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:07,023 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-02-22 02:21:07,025 WARN L147 QuantifierPusher]: treesize reduction 4, result has 83.3 percent of original size 20 [2021-02-22 02:21:07,028 WARN L141 QuantifierPusher]: treesize reduction 14, result has 78.1 percent of original size [2021-02-22 02:21:07,031 WARN L147 QuantifierPusher]: treesize reduction 14, result has 78.1 percent of original size 50 [2021-02-22 02:21:07,032 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-02-22 02:21:07,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:07,072 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:07,073 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:07,073 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:07,074 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-22 02:21:07,080 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:07,081 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-22 02:21:07,093 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:07,094 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-22 02:21:07,109 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:07,110 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:21:07,127 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:07,128 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:21:07,173 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:07,176 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:21:07,195 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:07,195 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:21:07,209 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:07,210 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:07,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:21:07,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:07,266 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:07,267 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:07,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-02-22 02:21:07,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:07,271 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:07,272 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:07,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:21:07,280 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:07,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:21:07,283 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:07,284 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-22 02:21:07,285 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-02-22 02:21:07,287 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:07,288 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:21:07,308 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:07,309 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-22 02:21:07,342 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:07,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:21:07,345 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:07,347 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:07,348 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-02-22 02:21:07,397 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:07,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:21:07,400 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:07,401 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-22 02:21:07,402 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-22 02:21:07,405 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 [2021-02-22 02:21:07,406 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:07,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:21:07,408 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:07,408 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-22 02:21:07,409 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-02-22 02:21:07,459 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:07,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:21:07,463 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:07,464 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-22 02:21:07,465 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-02-22 02:21:07,518 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:07,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:21:07,522 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:07,523 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-02-22 02:21:07,523 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-02-22 02:21:07,528 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 [2021-02-22 02:21:07,529 WARN L141 QuantifierPusher]: treesize reduction 6, result has 14.3 percent of original size [2021-02-22 02:21:07,530 WARN L147 QuantifierPusher]: treesize reduction 6, result has 14.3 percent of original size 1 [2021-02-22 02:21:07,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [959383828] [2021-02-22 02:21:07,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:21:07,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-02-22 02:21:07,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505984694] [2021-02-22 02:21:07,531 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-22 02:21:07,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:21:07,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-22 02:21:07,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=173, Unknown=3, NotChecked=54, Total=272 [2021-02-22 02:21:07,532 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand 17 states. [2021-02-22 02:21:08,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:21:08,211 INFO L93 Difference]: Finished difference Result 127 states and 132 transitions. [2021-02-22 02:21:08,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-22 02:21:08,212 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 69 [2021-02-22 02:21:08,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:21:08,214 INFO L225 Difference]: With dead ends: 127 [2021-02-22 02:21:08,214 INFO L226 Difference]: Without dead ends: 94 [2021-02-22 02:21:08,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=100, Invalid=411, Unknown=3, NotChecked=86, Total=600 [2021-02-22 02:21:08,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-02-22 02:21:08,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-02-22 02:21:08,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2021-02-22 02:21:08,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 97 transitions. [2021-02-22 02:21:08,235 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 97 transitions. Word has length 69 [2021-02-22 02:21:08,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:21:08,235 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 97 transitions. [2021-02-22 02:21:08,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-02-22 02:21:08,236 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 97 transitions. [2021-02-22 02:21:08,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-02-22 02:21:08,237 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:21:08,237 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] [2021-02-22 02:21:08,237 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-22 02:21:08,238 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:21:08,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:21:08,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1817632346, now seen corresponding path program 3 times [2021-02-22 02:21:08,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:21:08,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685158638] [2021-02-22 02:21:08,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:21:08,247 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:08,251 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-02-22 02:21:08,253 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:08,257 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-02-22 02:21:08,270 WARN L141 QuantifierPusher]: treesize reduction 4, result has 83.3 percent of original size [2021-02-22 02:21:08,271 INFO L723 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2021-02-22 02:21:08,273 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:08,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:21:08,274 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:08,277 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-02-22 02:21:08,278 WARN L147 QuantifierPusher]: treesize reduction 4, result has 83.3 percent of original size 20 [2021-02-22 02:21:08,280 WARN L141 QuantifierPusher]: treesize reduction 14, result has 78.1 percent of original size [2021-02-22 02:21:08,282 WARN L147 QuantifierPusher]: treesize reduction 14, result has 78.1 percent of original size 50 [2021-02-22 02:21:08,283 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-02-22 02:21:08,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:08,453 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:08,453 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:08,454 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:08,455 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:21:08,466 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:08,468 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:21:08,484 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:08,486 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-22 02:21:08,504 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:08,505 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-22 02:21:08,525 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:08,526 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-02-22 02:21:08,556 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:08,557 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-02-22 02:21:08,583 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:08,583 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-02-22 02:21:08,616 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:08,616 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-02-22 02:21:08,656 WARN L141 QuantifierPusher]: treesize reduction 14, result has 77.0 percent of original size [2021-02-22 02:21:08,658 WARN L147 QuantifierPusher]: treesize reduction 14, result has 77.0 percent of original size 47 [2021-02-22 02:21:08,757 WARN L141 QuantifierPusher]: treesize reduction 14, result has 77.0 percent of original size [2021-02-22 02:21:08,758 WARN L147 QuantifierPusher]: treesize reduction 14, result has 77.0 percent of original size 47 [2021-02-22 02:21:08,867 WARN L141 QuantifierPusher]: treesize reduction 14, result has 77.0 percent of original size [2021-02-22 02:21:08,870 WARN L147 QuantifierPusher]: treesize reduction 14, result has 77.0 percent of original size 47 [2021-02-22 02:21:08,974 WARN L141 QuantifierPusher]: treesize reduction 14, result has 76.3 percent of original size [2021-02-22 02:21:08,975 WARN L147 QuantifierPusher]: treesize reduction 14, result has 76.3 percent of original size 45 [2021-02-22 02:21:09,087 WARN L141 QuantifierPusher]: treesize reduction 14, result has 83.3 percent of original size [2021-02-22 02:21:09,089 WARN L147 QuantifierPusher]: treesize reduction 14, result has 83.3 percent of original size 70 [2021-02-22 02:21:09,214 WARN L141 QuantifierPusher]: treesize reduction 42, result has 81.8 percent of original size [2021-02-22 02:21:09,217 WARN L147 QuantifierPusher]: treesize reduction 42, result has 81.8 percent of original size 189 [2021-02-22 02:21:09,434 WARN L202 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 28 [2021-02-22 02:21:09,436 WARN L141 QuantifierPusher]: treesize reduction 43, result has 34.8 percent of original size [2021-02-22 02:21:09,437 WARN L147 QuantifierPusher]: treesize reduction 43, result has 34.8 percent of original size 23 [2021-02-22 02:21:09,500 WARN L141 QuantifierPusher]: treesize reduction 43, result has 34.8 percent of original size [2021-02-22 02:21:09,500 WARN L147 QuantifierPusher]: treesize reduction 43, result has 34.8 percent of original size 23 [2021-02-22 02:21:09,565 WARN L141 QuantifierPusher]: treesize reduction 43, result has 34.8 percent of original size [2021-02-22 02:21:09,568 WARN L147 QuantifierPusher]: treesize reduction 43, result has 34.8 percent of original size 23 [2021-02-22 02:21:09,636 WARN L141 QuantifierPusher]: treesize reduction 41, result has 33.9 percent of original size [2021-02-22 02:21:09,637 WARN L147 QuantifierPusher]: treesize reduction 41, result has 33.9 percent of original size 21 [2021-02-22 02:21:09,719 WARN L141 QuantifierPusher]: treesize reduction 95, result has 34.0 percent of original size [2021-02-22 02:21:09,720 WARN L147 QuantifierPusher]: treesize reduction 95, result has 34.0 percent of original size 49 [2021-02-22 02:21:09,845 WARN L141 QuantifierPusher]: treesize reduction 25, result has 68.4 percent of original size [2021-02-22 02:21:09,848 WARN L147 QuantifierPusher]: treesize reduction 25, result has 68.4 percent of original size 54 [2021-02-22 02:21:09,993 WARN L141 QuantifierPusher]: treesize reduction 23, result has 66.2 percent of original size [2021-02-22 02:21:09,995 WARN L147 QuantifierPusher]: treesize reduction 23, result has 66.2 percent of original size 45 [2021-02-22 02:21:10,123 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:10,124 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:21:10,157 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:10,160 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:21:10,193 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:10,194 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:21:10,232 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:10,233 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:10,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:21:10,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:10,329 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:10,330 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:10,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:21:10,352 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:10,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:21:10,357 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:10,358 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-22 02:21:10,359 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-02-22 02:21:10,363 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:10,364 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:21:10,431 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:10,432 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-22 02:21:10,522 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:10,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:21:10,527 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:10,527 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:10,528 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-22 02:21:10,640 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:10,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:21:10,643 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:10,644 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-22 02:21:10,645 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-02-22 02:21:10,760 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:10,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:21:10,762 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:10,762 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-22 02:21:10,763 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-02-22 02:21:10,878 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:10,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:21:10,882 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:10,883 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-22 02:21:10,884 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-02-22 02:21:11,000 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:11,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:21:11,004 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:11,005 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-02-22 02:21:11,006 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-02-22 02:21:11,136 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:11,137 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:11,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1685158638] [2021-02-22 02:21:11,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:21:11,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2021-02-22 02:21:11,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107900314] [2021-02-22 02:21:11,138 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-22 02:21:11,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:21:11,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-22 02:21:11,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=985, Unknown=22, NotChecked=0, Total=1122 [2021-02-22 02:21:11,140 INFO L87 Difference]: Start difference. First operand 94 states and 97 transitions. Second operand 34 states. [2021-02-22 02:21:15,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:21:15,528 INFO L93 Difference]: Finished difference Result 139 states and 144 transitions. [2021-02-22 02:21:15,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-02-22 02:21:15,529 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 73 [2021-02-22 02:21:15,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:21:15,530 INFO L225 Difference]: With dead ends: 139 [2021-02-22 02:21:15,531 INFO L226 Difference]: Without dead ends: 137 [2021-02-22 02:21:15,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=346, Invalid=3226, Unknown=88, NotChecked=0, Total=3660 [2021-02-22 02:21:15,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-02-22 02:21:15,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 104. [2021-02-22 02:21:15,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2021-02-22 02:21:15,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2021-02-22 02:21:15,559 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 73 [2021-02-22 02:21:15,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:21:15,559 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2021-02-22 02:21:15,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2021-02-22 02:21:15,559 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2021-02-22 02:21:15,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-02-22 02:21:15,567 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:21:15,569 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] [2021-02-22 02:21:15,569 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-22 02:21:15,570 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:21:15,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:21:15,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1762322824, now seen corresponding path program 2 times [2021-02-22 02:21:15,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:21:15,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1343223209] [2021-02-22 02:21:15,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:21:15,581 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:15,584 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-02-22 02:21:15,586 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:15,599 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-02-22 02:21:15,611 WARN L141 QuantifierPusher]: treesize reduction 4, result has 83.3 percent of original size [2021-02-22 02:21:15,613 INFO L723 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2021-02-22 02:21:15,615 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:15,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:21:15,617 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:15,621 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-02-22 02:21:15,622 WARN L147 QuantifierPusher]: treesize reduction 4, result has 83.3 percent of original size 20 [2021-02-22 02:21:15,625 WARN L141 QuantifierPusher]: treesize reduction 14, result has 78.1 percent of original size [2021-02-22 02:21:15,628 WARN L147 QuantifierPusher]: treesize reduction 14, result has 78.1 percent of original size 50 [2021-02-22 02:21:15,629 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-02-22 02:21:15,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 02:21:15,684 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 02:21:15,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 02:21:15,719 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 02:21:15,756 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-22 02:21:15,756 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-22 02:21:15,757 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-02-22 02:21:15,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.02 02:21:15 BoogieIcfgContainer [2021-02-22 02:21:15,778 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-22 02:21:15,779 INFO L168 Benchmark]: Toolchain (without parser) took 25079.77 ms. Allocated memory was 158.3 MB in the beginning and 190.8 MB in the end (delta: 32.5 MB). Free memory was 135.2 MB in the beginning and 160.1 MB in the end (delta: -24.9 MB). Peak memory consumption was 8.7 MB. Max. memory is 8.0 GB. [2021-02-22 02:21:15,779 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 158.3 MB. Free memory is still 131.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 02:21:15,780 INFO L168 Benchmark]: CACSL2BoogieTranslator took 291.98 ms. Allocated memory is still 158.3 MB. Free memory was 134.1 MB in the beginning and 123.7 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-22 02:21:15,780 INFO L168 Benchmark]: Boogie Preprocessor took 44.89 ms. Allocated memory is still 158.3 MB. Free memory was 123.7 MB in the beginning and 122.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-22 02:21:15,780 INFO L168 Benchmark]: RCFGBuilder took 708.53 ms. Allocated memory is still 158.3 MB. Free memory was 122.2 MB in the beginning and 134.1 MB in the end (delta: -12.0 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-02-22 02:21:15,780 INFO L168 Benchmark]: TraceAbstraction took 24011.06 ms. Allocated memory was 158.3 MB in the beginning and 190.8 MB in the end (delta: 32.5 MB). Free memory was 133.6 MB in the beginning and 160.1 MB in the end (delta: -26.5 MB). Peak memory consumption was 6.5 MB. Max. memory is 8.0 GB. [2021-02-22 02:21:15,781 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 158.3 MB. Free memory is still 131.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 291.98 ms. Allocated memory is still 158.3 MB. Free memory was 134.1 MB in the beginning and 123.7 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 44.89 ms. Allocated memory is still 158.3 MB. Free memory was 123.7 MB in the beginning and 122.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 708.53 ms. Allocated memory is still 158.3 MB. Free memory was 122.2 MB in the beginning and 134.1 MB in the end (delta: -12.0 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 24011.06 ms. Allocated memory was 158.3 MB in the beginning and 190.8 MB in the end (delta: 32.5 MB). Free memory was 133.6 MB in the beginning and 160.1 MB in the end (delta: -26.5 MB). Peak memory consumption was 6.5 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