/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/reducercommutativity/rangesum.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:43:49,142 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:43:49,148 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:43:49,198 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 22:43:49,199 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 22:43:49,204 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 22:43:49,208 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 22:43:49,216 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 22:43:49,220 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 22:43:49,228 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 22:43:49,229 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 22:43:49,230 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 22:43:49,230 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 22:43:49,233 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 22:43:49,235 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 22:43:49,237 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 22:43:49,238 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 22:43:49,242 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 22:43:49,252 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 22:43:49,257 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 22:43:49,259 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 22:43:49,261 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 22:43:49,263 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 22:43:49,265 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 22:43:49,270 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-06 22:43:49,285 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:43:49,286 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:43:49,286 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:43:49,287 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-06 22:43:49,340 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:43:49,340 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:43:49,345 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:43:49,345 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:43:49,346 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:43:49,346 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:43:49,346 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:43:49,346 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:43:49,346 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:43:49,347 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:43:49,348 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:43:49,348 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:43:49,348 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:43:49,348 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:43:49,349 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:43:49,349 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:43:49,349 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:43:49,349 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:43:49,349 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:43:49,350 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:43:49,350 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:43:49,350 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:43:49,350 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:43:49,350 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:43:49,351 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:43:49,351 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:43:49,351 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:43:49,351 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:43:49,351 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:43:49,351 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:43:49,764 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:43:49,787 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:43:49,790 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:43:49,792 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:43:49,792 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:43:49,793 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/rangesum.i [2020-11-06 22:43:49,875 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c04a0befc/64edf84731324dc09df190f15809a07a/FLAG1e991c5ca [2020-11-06 22:43:50,444 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:43:50,445 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/rangesum.i [2020-11-06 22:43:50,452 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c04a0befc/64edf84731324dc09df190f15809a07a/FLAG1e991c5ca [2020-11-06 22:43:50,804 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c04a0befc/64edf84731324dc09df190f15809a07a [2020-11-06 22:43:50,809 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:43:50,818 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:43:50,823 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:43:50,823 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:43:50,827 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:43:50,828 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:43:50" (1/1) ... [2020-11-06 22:43:50,832 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43f18152 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:50, skipping insertion in model container [2020-11-06 22:43:50,832 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:43:50" (1/1) ... [2020-11-06 22:43:50,840 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:43:50,865 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:43:51,043 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:43:51,052 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:43:51,094 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:43:51,123 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:43:51,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:51 WrapperNode [2020-11-06 22:43:51,125 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:43:51,126 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:43:51,126 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:43:51,127 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:43:51,140 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:51" (1/1) ... [2020-11-06 22:43:51,142 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:51" (1/1) ... [2020-11-06 22:43:51,164 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:51" (1/1) ... [2020-11-06 22:43:51,164 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:51" (1/1) ... [2020-11-06 22:43:51,188 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:51" (1/1) ... [2020-11-06 22:43:51,198 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:51" (1/1) ... [2020-11-06 22:43:51,204 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:51" (1/1) ... [2020-11-06 22:43:51,210 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:43:51,211 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:43:51,212 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:43:51,212 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:43:51,213 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:51" (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 [2020-11-06 22:43:51,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:43:51,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:43:51,297 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:43:51,297 INFO L138 BoogieDeclarations]: Found implementation of procedure init_nondet [2020-11-06 22:43:51,297 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2020-11-06 22:43:51,297 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:43:51,297 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:43:51,298 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:43:51,298 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-11-06 22:43:51,298 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-11-06 22:43:51,298 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:43:51,298 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:43:51,298 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-06 22:43:51,299 INFO L130 BoogieDeclarations]: Found specification of procedure init_nondet [2020-11-06 22:43:51,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:43:51,299 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2020-11-06 22:43:51,299 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:43:51,299 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:43:51,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:43:51,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:43:51,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:43:51,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:43:51,724 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:43:51,724 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-11-06 22:43:51,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:43:51 BoogieIcfgContainer [2020-11-06 22:43:51,726 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:43:51,728 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:43:51,728 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:43:51,732 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:43:51,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:43:50" (1/3) ... [2020-11-06 22:43:51,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f665816 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:43:51, skipping insertion in model container [2020-11-06 22:43:51,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:51" (2/3) ... [2020-11-06 22:43:51,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f665816 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:43:51, skipping insertion in model container [2020-11-06 22:43:51,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:43:51" (3/3) ... [2020-11-06 22:43:51,735 INFO L111 eAbstractionObserver]: Analyzing ICFG rangesum.i [2020-11-06 22:43:51,769 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:43:51,778 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:43:51,789 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:43:51,816 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:43:51,816 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:43:51,816 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:43:51,817 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:43:51,817 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:43:51,817 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:43:51,817 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:43:51,817 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:43:51,837 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-11-06 22:43:51,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-11-06 22:43:51,845 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:43:51,846 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-11-06 22:43:51,846 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:43:51,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:43:51,854 INFO L82 PathProgramCache]: Analyzing trace with hash -137461610, now seen corresponding path program 1 times [2020-11-06 22:43:51,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:43:51,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472028754] [2020-11-06 22:43:51,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:43:52,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:52,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472028754] [2020-11-06 22:43:52,098 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2020-11-06 22:43:52,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831016377] [2020-11-06 22:43:52,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:43:52,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:52,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 1 conjunts are in the unsatisfiable core [2020-11-06 22:43:52,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:43:52,287 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-06 22:43:52,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:43:52,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-06 22:43:52,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375664786] [2020-11-06 22:43:52,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-06 22:43:52,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:43:52,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-06 22:43:52,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-06 22:43:52,313 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 2 states. [2020-11-06 22:43:52,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:43:52,348 INFO L93 Difference]: Finished difference Result 73 states and 98 transitions. [2020-11-06 22:43:52,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-06 22:43:52,349 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 40 [2020-11-06 22:43:52,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:43:52,358 INFO L225 Difference]: With dead ends: 73 [2020-11-06 22:43:52,358 INFO L226 Difference]: Without dead ends: 35 [2020-11-06 22:43:52,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-06 22:43:52,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-06 22:43:52,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-11-06 22:43:52,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-06 22:43:52,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2020-11-06 22:43:52,426 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 40 [2020-11-06 22:43:52,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:43:52,427 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2020-11-06 22:43:52,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-06 22:43:52,427 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2020-11-06 22:43:52,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-11-06 22:43:52,429 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:43:52,430 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-11-06 22:43:52,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-11-06 22:43:52,645 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:43:52,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:43:52,646 INFO L82 PathProgramCache]: Analyzing trace with hash 2022028587, now seen corresponding path program 1 times [2020-11-06 22:43:52,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:43:52,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191839702] [2020-11-06 22:43:52,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:43:52,673 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-06 22:43:52,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [470877420] [2020-11-06 22:43:52,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:43:52,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:52,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-06 22:43:52,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:43:52,795 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-06 22:43:52,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191839702] [2020-11-06 22:43:52,796 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-06 22:43:52,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470877420] [2020-11-06 22:43:52,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:43:52,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-06 22:43:52,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589901607] [2020-11-06 22:43:52,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-06 22:43:52,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:43:52,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-06 22:43:52,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-06 22:43:52,809 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 3 states. [2020-11-06 22:43:52,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:43:52,839 INFO L93 Difference]: Finished difference Result 61 states and 79 transitions. [2020-11-06 22:43:52,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-06 22:43:52,840 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2020-11-06 22:43:52,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:43:52,843 INFO L225 Difference]: With dead ends: 61 [2020-11-06 22:43:52,843 INFO L226 Difference]: Without dead ends: 41 [2020-11-06 22:43:52,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-06 22:43:52,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-11-06 22:43:52,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2020-11-06 22:43:52,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-11-06 22:43:52,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2020-11-06 22:43:52,856 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 40 [2020-11-06 22:43:52,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:43:52,857 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2020-11-06 22:43:52,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-06 22:43:52,857 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2020-11-06 22:43:52,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-11-06 22:43:52,859 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:43:52,859 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-11-06 22:43:53,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:43:53,075 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:43:53,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:43:53,076 INFO L82 PathProgramCache]: Analyzing trace with hash 756174570, now seen corresponding path program 1 times [2020-11-06 22:43:53,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:43:53,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29838014] [2020-11-06 22:43:53,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:43:53,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:53,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:43:53,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:53,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-06 22:43:53,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:53,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-11-06 22:43:53,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:53,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-06 22:43:53,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:53,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-06 22:43:53,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:53,229 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-06 22:43:53,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29838014] [2020-11-06 22:43:53,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:43:53,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-06 22:43:53,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135640347] [2020-11-06 22:43:53,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-06 22:43:53,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:43:53,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-06 22:43:53,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-06 22:43:53,232 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 7 states. [2020-11-06 22:43:53,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:43:53,642 INFO L93 Difference]: Finished difference Result 69 states and 85 transitions. [2020-11-06 22:43:53,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-06 22:43:53,643 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 40 [2020-11-06 22:43:53,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:43:53,644 INFO L225 Difference]: With dead ends: 69 [2020-11-06 22:43:53,644 INFO L226 Difference]: Without dead ends: 41 [2020-11-06 22:43:53,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-11-06 22:43:53,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-11-06 22:43:53,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-11-06 22:43:53,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-11-06 22:43:53,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2020-11-06 22:43:53,655 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 40 [2020-11-06 22:43:53,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:43:53,656 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2020-11-06 22:43:53,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-06 22:43:53,656 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2020-11-06 22:43:53,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-11-06 22:43:53,657 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:43:53,658 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-11-06 22:43:53,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-06 22:43:53,658 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:43:53,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:43:53,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1530127672, now seen corresponding path program 1 times [2020-11-06 22:43:53,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:43:53,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977736818] [2020-11-06 22:43:53,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:43:53,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:53,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:43:53,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:53,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-06 22:43:53,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:53,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-06 22:43:53,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:53,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-11-06 22:43:53,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:53,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-11-06 22:43:53,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:53,785 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-11-06 22:43:53,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977736818] [2020-11-06 22:43:53,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143044348] [2020-11-06 22:43:53,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:43:53,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:53,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-06 22:43:53,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:43:53,950 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-06 22:43:53,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:43:53,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 9 [2020-11-06 22:43:53,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681646997] [2020-11-06 22:43:53,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-06 22:43:53,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:43:53,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-06 22:43:53,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:43:53,953 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 9 states. [2020-11-06 22:43:54,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:43:54,626 INFO L93 Difference]: Finished difference Result 74 states and 95 transitions. [2020-11-06 22:43:54,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-06 22:43:54,627 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2020-11-06 22:43:54,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:43:54,628 INFO L225 Difference]: With dead ends: 74 [2020-11-06 22:43:54,628 INFO L226 Difference]: Without dead ends: 46 [2020-11-06 22:43:54,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2020-11-06 22:43:54,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-11-06 22:43:54,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-11-06 22:43:54,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-06 22:43:54,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2020-11-06 22:43:54,639 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 42 [2020-11-06 22:43:54,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:43:54,639 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2020-11-06 22:43:54,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-06 22:43:54,639 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2020-11-06 22:43:54,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-06 22:43:54,641 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:43:54,641 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2020-11-06 22:43:54,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:43:54,855 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:43:54,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:43:54,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1229695831, now seen corresponding path program 1 times [2020-11-06 22:43:54,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:43:54,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215203819] [2020-11-06 22:43:54,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:43:54,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:54,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:43:54,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:54,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-06 22:43:54,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:54,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-11-06 22:43:54,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:54,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-11-06 22:43:54,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:54,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-11-06 22:43:54,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:54,998 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-11-06 22:43:54,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215203819] [2020-11-06 22:43:54,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:43:54,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-06 22:43:54,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913510657] [2020-11-06 22:43:54,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:43:55,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:43:55,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:43:55,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:43:55,001 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 6 states. [2020-11-06 22:43:55,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:43:55,305 INFO L93 Difference]: Finished difference Result 67 states and 80 transitions. [2020-11-06 22:43:55,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-06 22:43:55,305 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 53 [2020-11-06 22:43:55,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:43:55,307 INFO L225 Difference]: With dead ends: 67 [2020-11-06 22:43:55,307 INFO L226 Difference]: Without dead ends: 46 [2020-11-06 22:43:55,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-11-06 22:43:55,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-11-06 22:43:55,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-11-06 22:43:55,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-06 22:43:55,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2020-11-06 22:43:55,317 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 53 [2020-11-06 22:43:55,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:43:55,317 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2020-11-06 22:43:55,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:43:55,317 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2020-11-06 22:43:55,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-11-06 22:43:55,318 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:43:55,319 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2020-11-06 22:43:55,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-06 22:43:55,319 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:43:55,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:43:55,320 INFO L82 PathProgramCache]: Analyzing trace with hash 226732697, now seen corresponding path program 1 times [2020-11-06 22:43:55,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:43:55,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591569572] [2020-11-06 22:43:55,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:43:55,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:55,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:43:55,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:55,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-06 22:43:55,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:55,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-11-06 22:43:55,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:55,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-11-06 22:43:55,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:55,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-11-06 22:43:55,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:55,617 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-11-06 22:43:55,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591569572] [2020-11-06 22:43:55,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:43:55,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-11-06 22:43:55,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722359446] [2020-11-06 22:43:55,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-06 22:43:55,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:43:55,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-06 22:43:55,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-11-06 22:43:55,622 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand 11 states. [2020-11-06 22:43:56,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:43:56,031 INFO L93 Difference]: Finished difference Result 73 states and 90 transitions. [2020-11-06 22:43:56,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-06 22:43:56,032 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 55 [2020-11-06 22:43:56,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:43:56,033 INFO L225 Difference]: With dead ends: 73 [2020-11-06 22:43:56,033 INFO L226 Difference]: Without dead ends: 67 [2020-11-06 22:43:56,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-11-06 22:43:56,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-11-06 22:43:56,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 55. [2020-11-06 22:43:56,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-11-06 22:43:56,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2020-11-06 22:43:56,050 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 55 [2020-11-06 22:43:56,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:43:56,050 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2020-11-06 22:43:56,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-06 22:43:56,051 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2020-11-06 22:43:56,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-06 22:43:56,052 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:43:56,052 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 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] [2020-11-06 22:43:56,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-06 22:43:56,054 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:43:56,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:43:56,055 INFO L82 PathProgramCache]: Analyzing trace with hash -738175971, now seen corresponding path program 1 times [2020-11-06 22:43:56,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:43:56,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369124477] [2020-11-06 22:43:56,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:43:56,088 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-06 22:43:56,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1489535174] [2020-11-06 22:43:56,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:43:56,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:56,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-06 22:43:56,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:43:56,225 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-11-06 22:43:56,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369124477] [2020-11-06 22:43:56,226 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-06 22:43:56,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489535174] [2020-11-06 22:43:56,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-06 22:43:56,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-11-06 22:43:56,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831118602] [2020-11-06 22:43:56,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 22:43:56,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:43:56,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 22:43:56,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:43:56,228 INFO L87 Difference]: Start difference. First operand 55 states and 69 transitions. Second operand 5 states. [2020-11-06 22:43:56,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:43:56,313 INFO L93 Difference]: Finished difference Result 96 states and 132 transitions. [2020-11-06 22:43:56,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 22:43:56,313 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 58 [2020-11-06 22:43:56,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:43:56,315 INFO L225 Difference]: With dead ends: 96 [2020-11-06 22:43:56,315 INFO L226 Difference]: Without dead ends: 59 [2020-11-06 22:43:56,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:43:56,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-06 22:43:56,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-11-06 22:43:56,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-11-06 22:43:56,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2020-11-06 22:43:56,328 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 58 [2020-11-06 22:43:56,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:43:56,328 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2020-11-06 22:43:56,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 22:43:56,328 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2020-11-06 22:43:56,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-11-06 22:43:56,330 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:43:56,330 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 3, 3, 3, 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] [2020-11-06 22:43:56,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:43:56,546 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:43:56,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:43:56,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1011308910, now seen corresponding path program 2 times [2020-11-06 22:43:56,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:43:56,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711963103] [2020-11-06 22:43:56,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:43:56,567 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-06 22:43:56,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2045253997] [2020-11-06 22:43:56,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:43:56,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:43:56,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:43:56,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-06 22:43:56,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:43:57,006 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 66 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-11-06 22:43:57,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711963103] [2020-11-06 22:43:57,007 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-06 22:43:57,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045253997] [2020-11-06 22:43:57,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-06 22:43:57,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-11-06 22:43:57,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682374193] [2020-11-06 22:43:57,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-06 22:43:57,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:43:57,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-06 22:43:57,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:43:57,009 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand 9 states. [2020-11-06 22:43:57,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:43:57,147 INFO L93 Difference]: Finished difference Result 124 states and 158 transitions. [2020-11-06 22:43:57,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-06 22:43:57,153 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 67 [2020-11-06 22:43:57,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:43:57,154 INFO L225 Difference]: With dead ends: 124 [2020-11-06 22:43:57,154 INFO L226 Difference]: Without dead ends: 61 [2020-11-06 22:43:57,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-11-06 22:43:57,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-11-06 22:43:57,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-11-06 22:43:57,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-11-06 22:43:57,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 74 transitions. [2020-11-06 22:43:57,184 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 74 transitions. Word has length 67 [2020-11-06 22:43:57,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:43:57,184 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 74 transitions. [2020-11-06 22:43:57,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-06 22:43:57,184 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 74 transitions. [2020-11-06 22:43:57,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-11-06 22:43:57,186 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:43:57,187 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 3, 3, 3, 3, 3, 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] [2020-11-06 22:43:57,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:43:57,399 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:43:57,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:43:57,400 INFO L82 PathProgramCache]: Analyzing trace with hash -696492044, now seen corresponding path program 3 times [2020-11-06 22:43:57,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:43:57,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382770316] [2020-11-06 22:43:57,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:43:57,417 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-06 22:43:57,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1282910169] [2020-11-06 22:43:57,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:43:57,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-06 22:43:57,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:43:57,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-06 22:43:57,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:43:57,577 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:43:57,622 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-06 22:43:57,655 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-06 22:43:57,667 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 69 proven. 5 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-11-06 22:43:57,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382770316] [2020-11-06 22:43:57,668 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-06 22:43:57,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282910169] [2020-11-06 22:43:57,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-06 22:43:57,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-11-06 22:43:57,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999009979] [2020-11-06 22:43:57,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:43:57,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:43:57,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:43:57,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:43:57,670 INFO L87 Difference]: Start difference. First operand 60 states and 74 transitions. Second operand 6 states. [2020-11-06 22:43:57,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:43:57,820 INFO L93 Difference]: Finished difference Result 136 states and 180 transitions. [2020-11-06 22:43:57,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-06 22:43:57,821 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2020-11-06 22:43:57,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:43:57,823 INFO L225 Difference]: With dead ends: 136 [2020-11-06 22:43:57,823 INFO L226 Difference]: Without dead ends: 92 [2020-11-06 22:43:57,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-11-06 22:43:57,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-11-06 22:43:57,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 83. [2020-11-06 22:43:57,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-11-06 22:43:57,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 108 transitions. [2020-11-06 22:43:57,868 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 108 transitions. Word has length 69 [2020-11-06 22:43:57,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:43:57,869 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 108 transitions. [2020-11-06 22:43:57,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:43:57,869 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 108 transitions. [2020-11-06 22:43:57,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-11-06 22:43:57,871 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:43:57,872 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 3, 3, 3, 3, 3, 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] [2020-11-06 22:43:58,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:43:58,087 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:43:58,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:43:58,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1346435612, now seen corresponding path program 4 times [2020-11-06 22:43:58,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:43:58,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224186917] [2020-11-06 22:43:58,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:43:58,104 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-06 22:43:58,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [796261112] [2020-11-06 22:43:58,104 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:43:58,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-06 22:43:58,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:43:58,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-06 22:43:58,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:43:58,287 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 62 proven. 29 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-11-06 22:43:58,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224186917] [2020-11-06 22:43:58,288 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-06 22:43:58,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796261112] [2020-11-06 22:43:58,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-06 22:43:58,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-11-06 22:43:58,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947922507] [2020-11-06 22:43:58,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-06 22:43:58,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:43:58,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-06 22:43:58,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:43:58,290 INFO L87 Difference]: Start difference. First operand 83 states and 108 transitions. Second operand 9 states. [2020-11-06 22:43:58,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:43:58,457 INFO L93 Difference]: Finished difference Result 127 states and 160 transitions. [2020-11-06 22:43:58,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-06 22:43:58,459 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 69 [2020-11-06 22:43:58,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:43:58,460 INFO L225 Difference]: With dead ends: 127 [2020-11-06 22:43:58,461 INFO L226 Difference]: Without dead ends: 101 [2020-11-06 22:43:58,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-11-06 22:43:58,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-11-06 22:43:58,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 88. [2020-11-06 22:43:58,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-11-06 22:43:58,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 113 transitions. [2020-11-06 22:43:58,491 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 113 transitions. Word has length 69 [2020-11-06 22:43:58,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:43:58,492 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 113 transitions. [2020-11-06 22:43:58,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-06 22:43:58,492 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 113 transitions. [2020-11-06 22:43:58,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-11-06 22:43:58,497 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:43:58,497 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 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] [2020-11-06 22:43:58,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-06 22:43:58,709 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:43:58,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:43:58,710 INFO L82 PathProgramCache]: Analyzing trace with hash -964903240, now seen corresponding path program 1 times [2020-11-06 22:43:58,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:43:58,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021193548] [2020-11-06 22:43:58,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:43:58,722 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-06 22:43:58,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1808823483] [2020-11-06 22:43:58,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:43:58,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:58,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-06 22:43:58,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:43:58,882 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 80 proven. 6 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2020-11-06 22:43:58,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021193548] [2020-11-06 22:43:58,882 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-06 22:43:58,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808823483] [2020-11-06 22:43:58,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-06 22:43:58,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-11-06 22:43:58,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898663616] [2020-11-06 22:43:58,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-06 22:43:58,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:43:58,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-06 22:43:58,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-11-06 22:43:58,884 INFO L87 Difference]: Start difference. First operand 88 states and 113 transitions. Second operand 8 states. [2020-11-06 22:43:59,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:43:59,024 INFO L93 Difference]: Finished difference Result 147 states and 185 transitions. [2020-11-06 22:43:59,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-06 22:43:59,024 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 75 [2020-11-06 22:43:59,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:43:59,026 INFO L225 Difference]: With dead ends: 147 [2020-11-06 22:43:59,026 INFO L226 Difference]: Without dead ends: 97 [2020-11-06 22:43:59,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:43:59,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-11-06 22:43:59,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 94. [2020-11-06 22:43:59,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-11-06 22:43:59,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 119 transitions. [2020-11-06 22:43:59,041 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 119 transitions. Word has length 75 [2020-11-06 22:43:59,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:43:59,041 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 119 transitions. [2020-11-06 22:43:59,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-06 22:43:59,041 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 119 transitions. [2020-11-06 22:43:59,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-11-06 22:43:59,043 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:43:59,043 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 3, 3, 3, 3, 3, 3, 3, 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] [2020-11-06 22:43:59,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-11-06 22:43:59,259 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:43:59,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:43:59,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1153321990, now seen corresponding path program 2 times [2020-11-06 22:43:59,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:43:59,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321673107] [2020-11-06 22:43:59,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:43:59,278 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-06 22:43:59,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1729904111] [2020-11-06 22:43:59,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:43:59,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:43:59,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-11-06 22:43:59,408 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:43:59,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 22:43:59,483 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:43:59,550 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-06 22:43:59,550 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-06 22:43:59,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:43:59,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:43:59 BoogieIcfgContainer [2020-11-06 22:43:59,878 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:43:59,880 INFO L168 Benchmark]: Toolchain (without parser) took 9066.76 ms. Allocated memory was 125.8 MB in the beginning and 185.6 MB in the end (delta: 59.8 MB). Free memory was 100.8 MB in the beginning and 129.0 MB in the end (delta: -28.2 MB). Peak memory consumption was 32.6 MB. Max. memory is 8.0 GB. [2020-11-06 22:43:59,880 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 125.8 MB. Free memory is still 85.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:43:59,881 INFO L168 Benchmark]: CACSL2BoogieTranslator took 302.93 ms. Allocated memory is still 125.8 MB. Free memory was 100.3 MB in the beginning and 90.1 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-11-06 22:43:59,882 INFO L168 Benchmark]: Boogie Preprocessor took 83.64 ms. Allocated memory is still 125.8 MB. Free memory was 90.1 MB in the beginning and 88.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-06 22:43:59,882 INFO L168 Benchmark]: RCFGBuilder took 515.49 ms. Allocated memory was 125.8 MB in the beginning and 154.1 MB in the end (delta: 28.3 MB). Free memory was 88.4 MB in the beginning and 133.7 MB in the end (delta: -45.3 MB). Peak memory consumption was 20.0 MB. Max. memory is 8.0 GB. [2020-11-06 22:43:59,883 INFO L168 Benchmark]: TraceAbstraction took 8149.68 ms. Allocated memory was 154.1 MB in the beginning and 185.6 MB in the end (delta: 31.5 MB). Free memory was 133.2 MB in the beginning and 129.0 MB in the end (delta: 4.2 MB). Peak memory consumption was 35.6 MB. Max. memory is 8.0 GB. [2020-11-06 22:43:59,886 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 125.8 MB. Free memory is still 85.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 302.93 ms. Allocated memory is still 125.8 MB. Free memory was 100.3 MB in the beginning and 90.1 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 83.64 ms. Allocated memory is still 125.8 MB. Free memory was 90.1 MB in the beginning and 88.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 515.49 ms. Allocated memory was 125.8 MB in the beginning and 154.1 MB in the end (delta: 28.3 MB). Free memory was 88.4 MB in the beginning and 133.7 MB in the end (delta: -45.3 MB). Peak memory consumption was 20.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 8149.68 ms. Allocated memory was 154.1 MB in the beginning and 185.6 MB in the end (delta: 31.5 MB). Free memory was 133.2 MB in the beginning and 129.0 MB in the end (delta: 4.2 MB). Peak memory consumption was 35.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L15] int N; VAL [\old(N)=7, N=0] [L43] N = __VERIFIER_nondet_int() [L44] COND TRUE N > 1 [L45] int x[N]; VAL [\old(N)=0, N=3, x={2:0}] [L46] CALL init_nondet(x) VAL [\old(N)=0, N=3, x={2:0}] [L17] int i; [L18] i = 0 VAL [\old(N)=0, i=0, N=3, x={2:0}, x={2:0}] [L18] COND TRUE i < N [L19] x[i] = __VERIFIER_nondet_int() [L18] i++ VAL [\old(N)=0, i=1, N=3, x={2:0}, x={2:0}] [L18] COND TRUE i < N [L19] x[i] = __VERIFIER_nondet_int() [L18] i++ VAL [\old(N)=0, i=2, N=3, x={2:0}, x={2:0}] [L18] COND TRUE i < N [L19] x[i] = __VERIFIER_nondet_int() [L18] i++ VAL [\old(N)=0, i=3, N=3, x={2:0}, x={2:0}] [L18] COND FALSE !(i < N) VAL [\old(N)=0, i=3, N=3, x={2:0}, x={2:0}] [L46] RET init_nondet(x) VAL [\old(N)=0, N=3, x={2:0}] [L47] int temp; [L48] int ret; [L49] int ret2; [L50] int ret5; VAL [\old(N)=0, N=3, x={2:0}] [L52] CALL, EXPR rangesum(x) VAL [\old(N)=0, N=3, x={2:0}] [L25] int i; [L26] long long ret; [L27] ret = 0 [L28] int cnt = 0; [L29] i = 0 VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L29] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L30] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L29] i++ VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L29] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L30] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L29] i++ VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={2:0}, x={2:0}] [L29] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={2:0}, x={2:0}] [L30] COND TRUE i > N/2 [L31] EXPR x[i] [L31] ret = ret + x[i] [L32] cnt = cnt + 1 VAL [\old(N)=0, cnt=1, i=2, N=3, ret=1, x={2:0}, x={2:0}] [L29] i++ VAL [\old(N)=0, cnt=1, i=3, N=3, ret=1, x={2:0}, x={2:0}] [L29] COND FALSE !(i < N) VAL [\old(N)=0, cnt=1, i=3, N=3, ret=1, x={2:0}, x={2:0}] [L35] COND TRUE cnt !=0 [L36] return ret / cnt; VAL [\old(N)=0, \result=1, cnt=1, i=3, N=3, ret=1, x={2:0}, x={2:0}] [L52] RET, EXPR rangesum(x) VAL [\old(N)=0, N=3, rangesum(x)=1, x={2:0}] [L52] ret = rangesum(x) [L54] EXPR x[0] [L54] temp=x[0] [L54] EXPR x[1] [L54] x[0] = x[1] [L54] x[1] = temp VAL [\old(N)=0, N=3, ret=1, temp=1, x={2:0}] [L55] CALL, EXPR rangesum(x) VAL [\old(N)=0, N=3, x={2:0}] [L25] int i; [L26] long long ret; [L27] ret = 0 [L28] int cnt = 0; [L29] i = 0 VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L29] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L30] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L29] i++ VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L29] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L30] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L29] i++ VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={2:0}, x={2:0}] [L29] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={2:0}, x={2:0}] [L30] COND TRUE i > N/2 [L31] EXPR x[i] [L31] ret = ret + x[i] [L32] cnt = cnt + 1 VAL [\old(N)=0, cnt=1, i=2, N=3, ret=1, x={2:0}, x={2:0}] [L29] i++ VAL [\old(N)=0, cnt=1, i=3, N=3, ret=1, x={2:0}, x={2:0}] [L29] COND FALSE !(i < N) VAL [\old(N)=0, cnt=1, i=3, N=3, ret=1, x={2:0}, x={2:0}] [L35] COND TRUE cnt !=0 [L36] return ret / cnt; VAL [\old(N)=0, \result=1, cnt=1, i=3, N=3, ret=1, x={2:0}, x={2:0}] [L55] RET, EXPR rangesum(x) VAL [\old(N)=0, N=3, rangesum(x)=1, ret=1, temp=1, x={2:0}] [L55] ret2 = rangesum(x) [L56] EXPR x[0] [L56] temp=x[0] [L57] int i =0 ; VAL [\old(N)=0, i=0, N=3, ret=1, ret2=1, temp=-1, x={2:0}] [L57] COND TRUE i N/2) VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L29] i++ VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L29] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L30] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L29] i++ VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={2:0}, x={2:0}] [L29] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={2:0}, x={2:0}] [L30] COND TRUE i > N/2 [L31] EXPR x[i] [L31] ret = ret + x[i] [L32] cnt = cnt + 1 VAL [\old(N)=0, cnt=1, i=2, N=3, ret=-1, x={2:0}, x={2:0}] [L29] i++ VAL [\old(N)=0, cnt=1, i=3, N=3, ret=-1, x={2:0}, x={2:0}] [L29] COND FALSE !(i < N) VAL [\old(N)=0, cnt=1, i=3, N=3, ret=-1, x={2:0}, x={2:0}] [L35] COND TRUE cnt !=0 [L36] return ret / cnt; VAL [\old(N)=0, \result=-1, cnt=1, i=3, N=3, ret=-1, x={2:0}, x={2:0}] [L61] RET, EXPR rangesum(x) VAL [\old(N)=0, i=2, N=3, rangesum(x)=-1, ret=1, ret2=1, temp=-1, x={2:0}] [L61] ret5 = rangesum(x) [L63] COND TRUE ret != ret2 || ret !=ret5 VAL [\old(N)=0, i=2, N=3, ret=1, ret2=1, ret5=-1, temp=-1, x={2:0}] [L64] CALL reach_error() VAL [\old(N)=0, N=3] [L12] COND FALSE !(0) VAL [\old(N)=0, N=3] [L12] __assert_fail ("0", "rangesum.c", 17, __extension__ __PRETTY_FUNCTION__) VAL [\old(N)=0, N=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.9s, OverallIterations: 12, TraceHistogramMax: 9, AutomataDifference: 2.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 376 SDtfs, 356 SDslu, 641 SDs, 0 SdLazy, 971 SolverSat, 106 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 555 GetRequests, 462 SyntacticMatches, 7 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=94occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 11 MinimizatonAttempts, 45 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 767 NumberOfCodeBlocks, 737 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 638 ConstructedInterpolants, 0 QuantifiedInterpolants, 83080 SizeOfPredicates, 11 NumberOfNonLiveVariables, 1747 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 12 InterpolantComputations, 5 PerfectInterpolantSequences, 630/684 InterpolantCoveringCapability, 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...