/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/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-invgen/apache-escape-absolute.i.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 02:05:39,962 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 02:05:39,967 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 02:05:40,012 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 02:05:40,013 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 02:05:40,019 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 02:05:40,026 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 02:05:40,036 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 02:05:40,061 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 02:05:40,065 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 02:05:40,070 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 02:05:40,076 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 02:05:40,077 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 02:05:40,084 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 02:05:40,087 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 02:05:40,090 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 02:05:40,091 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 02:05:40,092 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 02:05:40,102 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 02:05:40,110 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 02:05:40,116 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 02:05:40,119 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 02:05:40,123 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 02:05:40,128 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 02:05:40,144 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 02:05:40,153 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-07 02:05:40,154 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-07 02:05:40,158 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-07 02:05:40,160 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-07 02:05:40,162 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-07 02:05:40,162 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-07 02:05:40,164 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-07 02:05:40,164 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-07 02:05:40,165 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 02:05:40,166 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 02:05:40,168 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 02:05:40,169 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 02:05:40,203 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 02:05:40,203 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 02:05:40,210 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 02:05:40,211 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 02:05:40,212 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 02:05:40,212 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 02:05:40,212 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 02:05:40,212 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 02:05:40,214 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 02:05:40,215 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 02:05:40,216 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 02:05:40,217 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 02:05:40,217 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 02:05:40,218 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 02:05:40,219 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 02:05:40,219 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 02:05:40,219 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 02:05:40,219 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 02:05:40,220 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 02:05:40,220 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 02:05:40,220 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 02:05:40,221 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 02:05:40,221 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 02:05:40,799 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 02:05:40,846 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 02:05:40,851 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 02:05:40,854 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 02:05:40,855 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 02:05:40,856 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/apache-escape-absolute.i.v+cfa-reducer.c [2020-11-07 02:05:40,970 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf94e2df8/e7a3a512d2e54d2296bcc23f0c8ad823/FLAG26d9144b9 [2020-11-07 02:05:41,818 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 02:05:41,819 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/apache-escape-absolute.i.v+cfa-reducer.c [2020-11-07 02:05:41,833 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf94e2df8/e7a3a512d2e54d2296bcc23f0c8ad823/FLAG26d9144b9 [2020-11-07 02:05:42,141 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf94e2df8/e7a3a512d2e54d2296bcc23f0c8ad823 [2020-11-07 02:05:42,146 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 02:05:42,155 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 02:05:42,160 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 02:05:42,161 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 02:05:42,166 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 02:05:42,168 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:05:42" (1/1) ... [2020-11-07 02:05:42,174 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23cead34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:42, skipping insertion in model container [2020-11-07 02:05:42,175 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:05:42" (1/1) ... [2020-11-07 02:05:42,187 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 02:05:42,261 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 02:05:42,508 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 02:05:42,539 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 02:05:42,673 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 02:05:42,717 INFO L208 MainTranslator]: Completed translation [2020-11-07 02:05:42,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:42 WrapperNode [2020-11-07 02:05:42,718 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 02:05:42,720 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 02:05:42,721 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 02:05:42,721 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 02:05:42,746 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:42" (1/1) ... [2020-11-07 02:05:42,747 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:42" (1/1) ... [2020-11-07 02:05:42,782 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:42" (1/1) ... [2020-11-07 02:05:42,785 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:42" (1/1) ... [2020-11-07 02:05:42,814 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:42" (1/1) ... [2020-11-07 02:05:42,829 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:42" (1/1) ... [2020-11-07 02:05:42,839 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:42" (1/1) ... [2020-11-07 02:05:42,849 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 02:05:42,853 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 02:05:42,853 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 02:05:42,853 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 02:05:42,856 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:42" (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 [2020-11-07 02:05:42,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 02:05:42,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 02:05:42,995 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 02:05:42,995 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-07 02:05:42,996 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 02:05:42,996 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 02:05:42,996 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 02:05:42,997 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 02:05:42,997 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 02:05:42,997 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-07 02:05:42,997 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 02:05:42,997 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 02:05:42,998 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 02:05:42,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 02:05:42,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 02:05:43,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 02:05:43,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 02:05:43,001 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 02:05:43,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 02:05:44,012 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 02:05:44,012 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-07 02:05:44,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:05:44 BoogieIcfgContainer [2020-11-07 02:05:44,015 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 02:05:44,017 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 02:05:44,017 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 02:05:44,021 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 02:05:44,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:05:42" (1/3) ... [2020-11-07 02:05:44,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d921209 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:05:44, skipping insertion in model container [2020-11-07 02:05:44,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:42" (2/3) ... [2020-11-07 02:05:44,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d921209 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:05:44, skipping insertion in model container [2020-11-07 02:05:44,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:05:44" (3/3) ... [2020-11-07 02:05:44,025 INFO L111 eAbstractionObserver]: Analyzing ICFG apache-escape-absolute.i.v+cfa-reducer.c [2020-11-07 02:05:44,042 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 02:05:44,046 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 02:05:44,059 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 02:05:44,085 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 02:05:44,086 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 02:05:44,086 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 02:05:44,086 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 02:05:44,086 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 02:05:44,087 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 02:05:44,087 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 02:05:44,087 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 02:05:44,109 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states. [2020-11-07 02:05:44,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-11-07 02:05:44,121 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:05:44,122 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] [2020-11-07 02:05:44,122 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:05:44,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:05:44,130 INFO L82 PathProgramCache]: Analyzing trace with hash 2097311355, now seen corresponding path program 1 times [2020-11-07 02:05:44,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:05:44,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1077416500] [2020-11-07 02:05:44,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:05:44,268 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:05:44,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:05:44,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:05:44,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:05:44,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:05:44,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1077416500] [2020-11-07 02:05:44,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:05:44,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-07 02:05:44,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500964124] [2020-11-07 02:05:44,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-07 02:05:44,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:05:44,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-07 02:05:44,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-07 02:05:44,728 INFO L87 Difference]: Start difference. First operand 218 states. Second operand 7 states. [2020-11-07 02:05:46,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:05:46,753 INFO L93 Difference]: Finished difference Result 280 states and 349 transitions. [2020-11-07 02:05:46,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-07 02:05:46,756 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 47 [2020-11-07 02:05:46,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:05:46,773 INFO L225 Difference]: With dead ends: 280 [2020-11-07 02:05:46,773 INFO L226 Difference]: Without dead ends: 226 [2020-11-07 02:05:46,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-11-07 02:05:46,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-11-07 02:05:46,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 180. [2020-11-07 02:05:46,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-11-07 02:05:46,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 199 transitions. [2020-11-07 02:05:46,925 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 199 transitions. Word has length 47 [2020-11-07 02:05:46,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:05:46,928 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 199 transitions. [2020-11-07 02:05:46,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-07 02:05:46,929 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 199 transitions. [2020-11-07 02:05:46,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-11-07 02:05:46,933 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:05:46,935 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] [2020-11-07 02:05:46,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 02:05:46,936 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:05:46,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:05:46,937 INFO L82 PathProgramCache]: Analyzing trace with hash -2144220168, now seen corresponding path program 1 times [2020-11-07 02:05:46,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:05:46,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [656370118] [2020-11-07 02:05:46,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:05:46,961 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:05:47,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:05:47,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:05:47,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:05:47,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:05:47,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [656370118] [2020-11-07 02:05:47,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:05:47,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-07 02:05:47,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353119829] [2020-11-07 02:05:47,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 02:05:47,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:05:47,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 02:05:47,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-11-07 02:05:47,271 INFO L87 Difference]: Start difference. First operand 180 states and 199 transitions. Second operand 8 states. [2020-11-07 02:05:48,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:05:48,115 INFO L93 Difference]: Finished difference Result 182 states and 200 transitions. [2020-11-07 02:05:48,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-07 02:05:48,119 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2020-11-07 02:05:48,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:05:48,123 INFO L225 Difference]: With dead ends: 182 [2020-11-07 02:05:48,124 INFO L226 Difference]: Without dead ends: 179 [2020-11-07 02:05:48,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-11-07 02:05:48,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-11-07 02:05:48,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2020-11-07 02:05:48,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-11-07 02:05:48,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 197 transitions. [2020-11-07 02:05:48,230 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 197 transitions. Word has length 52 [2020-11-07 02:05:48,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:05:48,230 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 197 transitions. [2020-11-07 02:05:48,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 02:05:48,231 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 197 transitions. [2020-11-07 02:05:48,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-11-07 02:05:48,233 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:05:48,234 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:05:48,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 02:05:48,235 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:05:48,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:05:48,236 INFO L82 PathProgramCache]: Analyzing trace with hash -99401472, now seen corresponding path program 1 times [2020-11-07 02:05:48,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:05:48,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1758631310] [2020-11-07 02:05:48,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:05:48,240 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:05:48,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:05:48,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:05:48,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:05:48,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:05:48,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1758631310] [2020-11-07 02:05:48,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:05:48,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-07 02:05:48,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789184452] [2020-11-07 02:05:48,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-07 02:05:48,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:05:48,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-07 02:05:48,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-07 02:05:48,490 INFO L87 Difference]: Start difference. First operand 179 states and 197 transitions. Second operand 7 states. [2020-11-07 02:05:49,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:05:49,770 INFO L93 Difference]: Finished difference Result 227 states and 252 transitions. [2020-11-07 02:05:49,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-07 02:05:49,772 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 62 [2020-11-07 02:05:49,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:05:49,776 INFO L225 Difference]: With dead ends: 227 [2020-11-07 02:05:49,776 INFO L226 Difference]: Without dead ends: 224 [2020-11-07 02:05:49,782 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-11-07 02:05:49,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-11-07 02:05:49,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 178. [2020-11-07 02:05:49,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-11-07 02:05:49,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 195 transitions. [2020-11-07 02:05:49,847 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 195 transitions. Word has length 62 [2020-11-07 02:05:49,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:05:49,848 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 195 transitions. [2020-11-07 02:05:49,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-07 02:05:49,849 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 195 transitions. [2020-11-07 02:05:49,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-11-07 02:05:49,850 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:05:49,851 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:05:49,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 02:05:49,851 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:05:49,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:05:49,852 INFO L82 PathProgramCache]: Analyzing trace with hash -636217690, now seen corresponding path program 1 times [2020-11-07 02:05:49,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:05:49,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1103040391] [2020-11-07 02:05:49,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:05:49,858 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:05:49,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:05:50,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:05:50,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:05:50,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:05:50,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1103040391] [2020-11-07 02:05:50,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:05:50,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-07 02:05:50,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807041774] [2020-11-07 02:05:50,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-07 02:05:50,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:05:50,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-07 02:05:50,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-07 02:05:50,066 INFO L87 Difference]: Start difference. First operand 178 states and 195 transitions. Second operand 7 states. [2020-11-07 02:05:50,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:05:50,767 INFO L93 Difference]: Finished difference Result 180 states and 196 transitions. [2020-11-07 02:05:50,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 02:05:50,768 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2020-11-07 02:05:50,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:05:50,770 INFO L225 Difference]: With dead ends: 180 [2020-11-07 02:05:50,771 INFO L226 Difference]: Without dead ends: 177 [2020-11-07 02:05:50,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-11-07 02:05:50,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-11-07 02:05:50,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2020-11-07 02:05:50,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-11-07 02:05:50,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 193 transitions. [2020-11-07 02:05:50,823 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 193 transitions. Word has length 67 [2020-11-07 02:05:50,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:05:50,824 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 193 transitions. [2020-11-07 02:05:50,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-07 02:05:50,824 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 193 transitions. [2020-11-07 02:05:50,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-11-07 02:05:50,826 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:05:50,827 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:05:50,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 02:05:50,827 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:05:50,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:05:50,828 INFO L82 PathProgramCache]: Analyzing trace with hash 256294954, now seen corresponding path program 1 times [2020-11-07 02:05:50,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:05:50,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2014491077] [2020-11-07 02:05:50,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:05:50,832 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:05:50,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:05:51,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:05:51,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:05:51,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:05:51,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2014491077] [2020-11-07 02:05:51,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:05:51,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-07 02:05:51,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343388061] [2020-11-07 02:05:51,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 02:05:51,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:05:51,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 02:05:51,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-11-07 02:05:51,030 INFO L87 Difference]: Start difference. First operand 177 states and 193 transitions. Second operand 8 states. [2020-11-07 02:05:51,790 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2020-11-07 02:05:51,930 WARN L194 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2020-11-07 02:05:53,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:05:53,280 INFO L93 Difference]: Finished difference Result 315 states and 351 transitions. [2020-11-07 02:05:53,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-07 02:05:53,282 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 73 [2020-11-07 02:05:53,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:05:53,285 INFO L225 Difference]: With dead ends: 315 [2020-11-07 02:05:53,285 INFO L226 Difference]: Without dead ends: 312 [2020-11-07 02:05:53,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-11-07 02:05:53,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-11-07 02:05:53,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 188. [2020-11-07 02:05:53,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-11-07 02:05:53,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 206 transitions. [2020-11-07 02:05:53,349 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 206 transitions. Word has length 73 [2020-11-07 02:05:53,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:05:53,350 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 206 transitions. [2020-11-07 02:05:53,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 02:05:53,350 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 206 transitions. [2020-11-07 02:05:53,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-11-07 02:05:53,352 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:05:53,352 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:05:53,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 02:05:53,353 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:05:53,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:05:53,354 INFO L82 PathProgramCache]: Analyzing trace with hash 226428244, now seen corresponding path program 1 times [2020-11-07 02:05:53,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:05:53,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [214549184] [2020-11-07 02:05:53,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:05:53,358 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:05:53,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:05:53,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:05:53,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:05:53,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:05:53,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [214549184] [2020-11-07 02:05:53,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:05:53,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-07 02:05:53,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044266076] [2020-11-07 02:05:53,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 02:05:53,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:05:53,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 02:05:53,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-11-07 02:05:53,541 INFO L87 Difference]: Start difference. First operand 188 states and 206 transitions. Second operand 8 states. [2020-11-07 02:05:54,362 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2020-11-07 02:05:54,511 WARN L194 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2020-11-07 02:05:54,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:05:54,723 INFO L93 Difference]: Finished difference Result 190 states and 207 transitions. [2020-11-07 02:05:54,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-07 02:05:54,724 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 78 [2020-11-07 02:05:54,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:05:54,726 INFO L225 Difference]: With dead ends: 190 [2020-11-07 02:05:54,726 INFO L226 Difference]: Without dead ends: 187 [2020-11-07 02:05:54,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-11-07 02:05:54,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-11-07 02:05:54,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2020-11-07 02:05:54,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-11-07 02:05:54,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 204 transitions. [2020-11-07 02:05:54,818 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 204 transitions. Word has length 78 [2020-11-07 02:05:54,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:05:54,819 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 204 transitions. [2020-11-07 02:05:54,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 02:05:54,819 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 204 transitions. [2020-11-07 02:05:54,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-11-07 02:05:54,821 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:05:54,821 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:05:54,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 02:05:54,822 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:05:54,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:05:54,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1715941524, now seen corresponding path program 1 times [2020-11-07 02:05:54,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:05:54,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [318812217] [2020-11-07 02:05:54,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:05:54,826 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:05:54,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:05:55,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:05:55,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:05:55,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:05:55,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [318812217] [2020-11-07 02:05:55,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:05:55,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-07 02:05:55,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146846763] [2020-11-07 02:05:55,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 02:05:55,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:05:55,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 02:05:55,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-11-07 02:05:55,055 INFO L87 Difference]: Start difference. First operand 187 states and 204 transitions. Second operand 8 states. [2020-11-07 02:05:55,844 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2020-11-07 02:05:55,989 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2020-11-07 02:05:57,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:05:57,894 INFO L93 Difference]: Finished difference Result 433 states and 480 transitions. [2020-11-07 02:05:57,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-07 02:05:57,895 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 78 [2020-11-07 02:05:57,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:05:57,902 INFO L225 Difference]: With dead ends: 433 [2020-11-07 02:05:57,902 INFO L226 Difference]: Without dead ends: 430 [2020-11-07 02:05:57,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-11-07 02:05:57,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2020-11-07 02:05:57,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 192. [2020-11-07 02:05:57,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-11-07 02:05:57,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 209 transitions. [2020-11-07 02:05:57,979 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 209 transitions. Word has length 78 [2020-11-07 02:05:57,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:05:57,980 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 209 transitions. [2020-11-07 02:05:57,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 02:05:57,980 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 209 transitions. [2020-11-07 02:05:57,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-11-07 02:05:57,985 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:05:57,986 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:05:57,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-07 02:05:57,987 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:05:57,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:05:57,988 INFO L82 PathProgramCache]: Analyzing trace with hash 2011231013, now seen corresponding path program 1 times [2020-11-07 02:05:57,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:05:57,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294282251] [2020-11-07 02:05:57,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:05:57,994 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:05:58,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:05:58,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:05:58,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:05:58,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:05:58,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294282251] [2020-11-07 02:05:58,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:05:58,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-07 02:05:58,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937938893] [2020-11-07 02:05:58,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 02:05:58,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:05:58,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 02:05:58,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-11-07 02:05:58,199 INFO L87 Difference]: Start difference. First operand 192 states and 209 transitions. Second operand 8 states. [2020-11-07 02:05:58,812 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2020-11-07 02:05:59,050 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2020-11-07 02:05:59,207 WARN L194 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2020-11-07 02:05:59,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:05:59,822 INFO L93 Difference]: Finished difference Result 286 states and 313 transitions. [2020-11-07 02:05:59,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-07 02:05:59,823 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 83 [2020-11-07 02:05:59,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:05:59,825 INFO L225 Difference]: With dead ends: 286 [2020-11-07 02:05:59,826 INFO L226 Difference]: Without dead ends: 283 [2020-11-07 02:05:59,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2020-11-07 02:05:59,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-11-07 02:05:59,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 191. [2020-11-07 02:05:59,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-11-07 02:05:59,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 207 transitions. [2020-11-07 02:05:59,890 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 207 transitions. Word has length 83 [2020-11-07 02:05:59,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:05:59,890 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 207 transitions. [2020-11-07 02:05:59,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 02:05:59,890 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 207 transitions. [2020-11-07 02:05:59,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-11-07 02:05:59,892 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:05:59,892 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:05:59,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-07 02:05:59,893 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:05:59,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:05:59,894 INFO L82 PathProgramCache]: Analyzing trace with hash -348210566, now seen corresponding path program 1 times [2020-11-07 02:05:59,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:05:59,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1676254940] [2020-11-07 02:05:59,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:05:59,897 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:05:59,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:05:59,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:05:59,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:05:59,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:05:59,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1676254940] [2020-11-07 02:05:59,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:05:59,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 02:05:59,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677224120] [2020-11-07 02:05:59,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 02:05:59,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:05:59,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 02:05:59,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 02:05:59,994 INFO L87 Difference]: Start difference. First operand 191 states and 207 transitions. Second operand 4 states. [2020-11-07 02:06:00,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:06:00,687 INFO L93 Difference]: Finished difference Result 282 states and 308 transitions. [2020-11-07 02:06:00,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 02:06:00,691 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 84 [2020-11-07 02:06:00,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:06:00,693 INFO L225 Difference]: With dead ends: 282 [2020-11-07 02:06:00,693 INFO L226 Difference]: Without dead ends: 191 [2020-11-07 02:06:00,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 02:06:00,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-11-07 02:06:00,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2020-11-07 02:06:00,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-11-07 02:06:00,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 205 transitions. [2020-11-07 02:06:00,759 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 205 transitions. Word has length 84 [2020-11-07 02:06:00,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:06:00,759 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 205 transitions. [2020-11-07 02:06:00,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 02:06:00,760 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 205 transitions. [2020-11-07 02:06:00,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-11-07 02:06:00,761 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:06:00,761 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:06:00,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-07 02:06:00,762 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:06:00,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:06:00,763 INFO L82 PathProgramCache]: Analyzing trace with hash -782874089, now seen corresponding path program 1 times [2020-11-07 02:06:00,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:06:00,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1404518196] [2020-11-07 02:06:00,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:06:00,766 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:06:00,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:06:00,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:06:00,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:06:00,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:06:00,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1404518196] [2020-11-07 02:06:00,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:06:00,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-07 02:06:00,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654519802] [2020-11-07 02:06:00,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 02:06:00,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:06:00,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 02:06:00,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-11-07 02:06:00,964 INFO L87 Difference]: Start difference. First operand 191 states and 205 transitions. Second operand 8 states. [2020-11-07 02:06:02,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:06:02,090 INFO L93 Difference]: Finished difference Result 193 states and 206 transitions. [2020-11-07 02:06:02,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-07 02:06:02,091 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 89 [2020-11-07 02:06:02,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:06:02,093 INFO L225 Difference]: With dead ends: 193 [2020-11-07 02:06:02,093 INFO L226 Difference]: Without dead ends: 190 [2020-11-07 02:06:02,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2020-11-07 02:06:02,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-11-07 02:06:02,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2020-11-07 02:06:02,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-11-07 02:06:02,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 203 transitions. [2020-11-07 02:06:02,182 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 203 transitions. Word has length 89 [2020-11-07 02:06:02,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:06:02,183 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 203 transitions. [2020-11-07 02:06:02,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 02:06:02,183 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 203 transitions. [2020-11-07 02:06:02,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-11-07 02:06:02,185 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:06:02,186 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:06:02,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-07 02:06:02,186 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:06:02,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:06:02,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1988822630, now seen corresponding path program 1 times [2020-11-07 02:06:02,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:06:02,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1178952074] [2020-11-07 02:06:02,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:06:02,198 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:06:02,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:06:02,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:06:02,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:06:02,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:06:02,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1178952074] [2020-11-07 02:06:02,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:06:02,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-07 02:06:02,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278070329] [2020-11-07 02:06:02,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-07 02:06:02,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:06:02,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-07 02:06:02,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-07 02:06:02,396 INFO L87 Difference]: Start difference. First operand 190 states and 203 transitions. Second operand 7 states. [2020-11-07 02:06:03,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:06:03,182 INFO L93 Difference]: Finished difference Result 192 states and 204 transitions. [2020-11-07 02:06:03,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 02:06:03,183 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-11-07 02:06:03,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:06:03,185 INFO L225 Difference]: With dead ends: 192 [2020-11-07 02:06:03,185 INFO L226 Difference]: Without dead ends: 189 [2020-11-07 02:06:03,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-11-07 02:06:03,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-11-07 02:06:03,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2020-11-07 02:06:03,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-11-07 02:06:03,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 201 transitions. [2020-11-07 02:06:03,260 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 201 transitions. Word has length 94 [2020-11-07 02:06:03,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:06:03,261 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 201 transitions. [2020-11-07 02:06:03,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-07 02:06:03,261 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 201 transitions. [2020-11-07 02:06:03,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-11-07 02:06:03,263 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:06:03,265 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:06:03,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-07 02:06:03,266 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:06:03,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:06:03,267 INFO L82 PathProgramCache]: Analyzing trace with hash -481418103, now seen corresponding path program 1 times [2020-11-07 02:06:03,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:06:03,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [215141416] [2020-11-07 02:06:03,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:06:03,440 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2020-11-07 02:06:04,481 WARN L194 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 103 [2020-11-07 02:06:04,563 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-07 02:06:04,619 INFO L316 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-11-07 02:06:04,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 02:06:04,680 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 02:06:04,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 02:06:04,719 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 02:06:04,769 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-11-07 02:06:04,769 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 02:06:04,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-07 02:06:04,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 02:06:04 BoogieIcfgContainer [2020-11-07 02:06:04,800 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 02:06:04,802 INFO L168 Benchmark]: Toolchain (without parser) took 22652.50 ms. Allocated memory was 154.1 MB in the beginning and 360.7 MB in the end (delta: 206.6 MB). Free memory was 130.1 MB in the beginning and 236.0 MB in the end (delta: -106.0 MB). Peak memory consumption was 101.7 MB. Max. memory is 8.0 GB. [2020-11-07 02:06:04,803 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 154.1 MB. Free memory is still 126.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 02:06:04,804 INFO L168 Benchmark]: CACSL2BoogieTranslator took 558.74 ms. Allocated memory is still 154.1 MB. Free memory was 129.6 MB in the beginning and 116.9 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-11-07 02:06:04,805 INFO L168 Benchmark]: Boogie Preprocessor took 129.39 ms. Allocated memory is still 154.1 MB. Free memory was 116.9 MB in the beginning and 114.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-07 02:06:04,807 INFO L168 Benchmark]: RCFGBuilder took 1162.43 ms. Allocated memory is still 154.1 MB. Free memory was 114.9 MB in the beginning and 108.8 MB in the end (delta: 6.1 MB). Peak memory consumption was 14.0 MB. Max. memory is 8.0 GB. [2020-11-07 02:06:04,810 INFO L168 Benchmark]: TraceAbstraction took 20783.19 ms. Allocated memory was 154.1 MB in the beginning and 360.7 MB in the end (delta: 206.6 MB). Free memory was 108.8 MB in the beginning and 236.0 MB in the end (delta: -127.3 MB). Peak memory consumption was 81.4 MB. Max. memory is 8.0 GB. [2020-11-07 02:06:04,817 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 154.1 MB. Free memory is still 126.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 558.74 ms. Allocated memory is still 154.1 MB. Free memory was 129.6 MB in the beginning and 116.9 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 129.39 ms. Allocated memory is still 154.1 MB. Free memory was 116.9 MB in the beginning and 114.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1162.43 ms. Allocated memory is still 154.1 MB. Free memory was 114.9 MB in the beginning and 108.8 MB in the end (delta: 6.1 MB). Peak memory consumption was 14.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 20783.19 ms. Allocated memory was 154.1 MB in the beginning and 360.7 MB in the end (delta: 206.6 MB). Free memory was 108.8 MB in the beginning and 236.0 MB in the end (delta: -127.3 MB). Peak memory consumption was 81.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L1] int __return_main; [L12] int __return_375; [L15] int main__scheme; [L16] int main__urilen; [L17] int main__tokenlen; [L18] int main__cp; [L19] int main__c; [L20] main__urilen = __VERIFIER_nondet_int() [L21] main__tokenlen = __VERIFIER_nondet_int() [L22] main__scheme = __VERIFIER_nondet_int() [L23] COND FALSE !(!(main__urilen <= 1000000)) [L29] COND FALSE !(!(main__urilen >= -1000000)) [L35] COND FALSE !(!(main__tokenlen <= 1000000)) [L41] COND FALSE !(!(main__tokenlen >= -1000000)) [L47] COND FALSE !(!(main__scheme <= 1000000)) [L53] COND FALSE !(!(main__scheme >= -1000000)) [L59] COND TRUE main__urilen > 0 [L61] COND TRUE main__tokenlen > 0 [L63] COND TRUE main__scheme >= 0 [L65] COND FALSE !(main__scheme == 0) [L71] COND FALSE !((main__urilen - 1) < main__scheme) [L77] main__cp = main__scheme [L79] int __tmp_1; [L80] __tmp_1 = (main__cp - 1) < main__urilen [L81] int __VERIFIER_assert__cond; [L82] __VERIFIER_assert__cond = __tmp_1 [L83] COND FALSE !(__VERIFIER_assert__cond == 0) [L91] int __tmp_2; [L92] __tmp_2 = 0 <= (main__cp - 1) [L93] int __VERIFIER_assert__cond; [L94] __VERIFIER_assert__cond = __tmp_2 [L95] COND FALSE !(__VERIFIER_assert__cond == 0) [L102] int main____CPAchecker_TMP_0; [L103] main____CPAchecker_TMP_0 = __VERIFIER_nondet_int() [L104] COND TRUE !(main____CPAchecker_TMP_0 == 0) [L107] int __tmp_3; [L108] __tmp_3 = main__cp < main__urilen [L109] int __VERIFIER_assert__cond; [L110] __VERIFIER_assert__cond = __tmp_3 [L111] COND FALSE !(__VERIFIER_assert__cond == 0) [L119] int __tmp_4; [L120] __tmp_4 = 0 <= main__cp [L121] int __VERIFIER_assert__cond; [L122] __VERIFIER_assert__cond = __tmp_4 [L123] COND FALSE !(__VERIFIER_assert__cond == 0) [L131] COND TRUE main__cp != (main__urilen - 1) [L133] int main____CPAchecker_TMP_1; [L134] main____CPAchecker_TMP_1 = __VERIFIER_nondet_int() [L135] COND FALSE !(!(main____CPAchecker_TMP_1 == 0)) [L368] int __tmp_17; [L369] __tmp_17 = main__cp < main__urilen [L370] int __VERIFIER_assert__cond; [L371] __VERIFIER_assert__cond = __tmp_17 [L372] COND FALSE !(__VERIFIER_assert__cond == 0) [L380] int __tmp_18; [L381] __tmp_18 = 0 <= main__cp [L382] int __VERIFIER_assert__cond; [L383] __VERIFIER_assert__cond = __tmp_18 [L384] COND FALSE !(__VERIFIER_assert__cond == 0) [L391] main__cp = main__cp + 1 [L131] COND TRUE main__cp != (main__urilen - 1) [L133] int main____CPAchecker_TMP_1; [L134] main____CPAchecker_TMP_1 = __VERIFIER_nondet_int() [L135] COND FALSE !(!(main____CPAchecker_TMP_1 == 0)) [L368] int __tmp_17; [L369] __tmp_17 = main__cp < main__urilen [L370] int __VERIFIER_assert__cond; [L371] __VERIFIER_assert__cond = __tmp_17 [L372] COND TRUE __VERIFIER_assert__cond == 0 [L374] CALL reach_error() [L4] __assert_fail("0", "apache-escape-absolute.i.v+cfa-reducer.c", 4, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 223 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 20.6s, OverallIterations: 12, TraceHistogramMax: 2, AutomataDifference: 15.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2089 SDtfs, 7272 SDslu, 1387 SDs, 0 SdLazy, 4587 SolverSat, 353 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 157 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 5.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=218occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 11 MinimizatonAttempts, 546 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...