/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 05:05:04,326 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 05:05:04,330 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 05:05:04,396 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 05:05:04,397 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 05:05:04,402 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 05:05:04,407 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 05:05:04,416 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 05:05:04,419 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 05:05:04,426 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 05:05:04,441 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 05:05:04,443 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 05:05:04,444 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 05:05:04,445 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 05:05:04,446 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 05:05:04,450 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 05:05:04,451 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 05:05:04,455 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 05:05:04,460 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 05:05:04,472 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 05:05:04,476 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 05:05:04,478 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 05:05:04,481 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 05:05:04,482 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 05:05:04,485 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 05:05:04,501 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 05:05:04,502 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 05:05:04,503 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 05:05:04,505 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 05:05:04,567 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 05:05:04,567 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 05:05:04,572 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 05:05:04,572 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 05:05:04,573 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 05:05:04,573 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 05:05:04,573 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 05:05:04,573 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 05:05:04,574 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 05:05:04,574 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 05:05:04,575 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 05:05:04,576 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 05:05:04,576 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 05:05:04,576 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 05:05:04,576 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 05:05:04,577 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 05:05:04,577 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 05:05:04,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 05:05:04,577 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 05:05:04,578 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 05:05:04,578 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 05:05:04,578 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 05:05:04,579 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 05:05:04,579 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 05:05:04,579 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 05:05:04,579 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 05:05:04,950 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 05:05:04,977 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 05:05:04,980 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 05:05:04,982 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 05:05:04,983 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 05:05:04,984 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound2.c [2020-12-22 05:05:05,075 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19f4a2ed2/04a337f432054f659c693797154f6485/FLAG28a87c0ec [2020-12-22 05:05:05,633 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 05:05:05,634 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound2.c [2020-12-22 05:05:05,643 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19f4a2ed2/04a337f432054f659c693797154f6485/FLAG28a87c0ec [2020-12-22 05:05:05,981 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19f4a2ed2/04a337f432054f659c693797154f6485 [2020-12-22 05:05:05,989 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 05:05:05,992 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 05:05:05,997 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 05:05:05,997 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 05:05:06,002 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 05:05:06,004 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:05:05" (1/1) ... [2020-12-22 05:05:06,011 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@423fee39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:05:06, skipping insertion in model container [2020-12-22 05:05:06,012 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:05:05" (1/1) ... [2020-12-22 05:05:06,022 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 05:05:06,050 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 05:05:06,212 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound2.c[525,538] [2020-12-22 05:05:06,245 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:05:06,256 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 05:05:06,271 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound2.c[525,538] [2020-12-22 05:05:06,289 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:05:06,313 INFO L208 MainTranslator]: Completed translation [2020-12-22 05:05:06,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:05:06 WrapperNode [2020-12-22 05:05:06,314 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 05:05:06,321 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 05:05:06,321 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 05:05:06,321 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 05:05:06,331 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:05:06" (1/1) ... [2020-12-22 05:05:06,341 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:05:06" (1/1) ... [2020-12-22 05:05:06,439 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 05:05:06,440 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 05:05:06,443 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 05:05:06,443 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 05:05:06,458 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:05:06" (1/1) ... [2020-12-22 05:05:06,458 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:05:06" (1/1) ... [2020-12-22 05:05:06,472 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:05:06" (1/1) ... [2020-12-22 05:05:06,472 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:05:06" (1/1) ... [2020-12-22 05:05:06,489 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:05:06" (1/1) ... [2020-12-22 05:05:06,498 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:05:06" (1/1) ... [2020-12-22 05:05:06,503 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:05:06" (1/1) ... [2020-12-22 05:05:06,511 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 05:05:06,512 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 05:05:06,513 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 05:05:06,513 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 05:05:06,517 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:05:06" (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 [2020-12-22 05:05:06,640 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 05:05:06,640 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 05:05:06,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 05:05:06,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 05:05:09,186 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 05:05:09,187 INFO L299 CfgBuilder]: Removed 28 assume(true) statements. [2020-12-22 05:05:09,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:05:09 BoogieIcfgContainer [2020-12-22 05:05:09,189 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 05:05:09,190 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 05:05:09,191 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 05:05:09,194 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 05:05:09,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 05:05:05" (1/3) ... [2020-12-22 05:05:09,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50c26dbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:05:09, skipping insertion in model container [2020-12-22 05:05:09,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:05:06" (2/3) ... [2020-12-22 05:05:09,197 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50c26dbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:05:09, skipping insertion in model container [2020-12-22 05:05:09,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:05:09" (3/3) ... [2020-12-22 05:05:09,199 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_valuebound2.c [2020-12-22 05:05:09,206 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 05:05:09,210 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2020-12-22 05:05:09,230 INFO L253 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2020-12-22 05:05:09,258 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 05:05:09,259 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 05:05:09,259 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 05:05:09,259 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 05:05:09,259 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 05:05:09,259 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 05:05:09,259 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 05:05:09,259 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 05:05:09,277 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states. [2020-12-22 05:05:09,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 05:05:09,283 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:05:09,284 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:05:09,285 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:05:09,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:05:09,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1235857098, now seen corresponding path program 1 times [2020-12-22 05:05:09,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:05:09,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701353122] [2020-12-22 05:05:09,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:05:09,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:05:09,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:05:09,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701353122] [2020-12-22 05:05:09,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:05:09,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 05:05:09,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139831177] [2020-12-22 05:05:09,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 05:05:09,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:05:09,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 05:05:09,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 05:05:09,499 INFO L87 Difference]: Start difference. First operand 50 states. Second operand 2 states. [2020-12-22 05:05:09,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:05:09,523 INFO L93 Difference]: Finished difference Result 97 states and 130 transitions. [2020-12-22 05:05:09,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 05:05:09,525 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-12-22 05:05:09,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:05:09,534 INFO L225 Difference]: With dead ends: 97 [2020-12-22 05:05:09,534 INFO L226 Difference]: Without dead ends: 46 [2020-12-22 05:05:09,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 05:05:09,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-22 05:05:09,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-12-22 05:05:09,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-22 05:05:09,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-12-22 05:05:09,579 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 10 [2020-12-22 05:05:09,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:05:09,580 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-12-22 05:05:09,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 05:05:09,580 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-12-22 05:05:09,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 05:05:09,581 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:05:09,581 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:05:09,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 05:05:09,582 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:05:09,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:05:09,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1503620767, now seen corresponding path program 1 times [2020-12-22 05:05:09,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:05:09,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769422544] [2020-12-22 05:05:09,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:05:09,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:05:09,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:05:09,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769422544] [2020-12-22 05:05:09,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:05:09,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 05:05:09,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259039240] [2020-12-22 05:05:09,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 05:05:09,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:05:09,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 05:05:09,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:05:09,859 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 5 states. [2020-12-22 05:05:35,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:05:35,095 INFO L93 Difference]: Finished difference Result 110 states and 121 transitions. [2020-12-22 05:05:35,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 05:05:35,095 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-22 05:05:35,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:05:35,097 INFO L225 Difference]: With dead ends: 110 [2020-12-22 05:05:35,097 INFO L226 Difference]: Without dead ends: 68 [2020-12-22 05:05:35,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 05:05:35,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-22 05:05:35,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 63. [2020-12-22 05:05:35,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-22 05:05:35,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2020-12-22 05:05:35,113 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 11 [2020-12-22 05:05:35,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:05:35,113 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2020-12-22 05:05:35,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 05:05:35,114 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2020-12-22 05:05:35,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 05:05:35,114 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:05:35,115 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:05:35,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 05:05:35,115 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:05:35,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:05:35,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1828543716, now seen corresponding path program 1 times [2020-12-22 05:05:35,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:05:35,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91330217] [2020-12-22 05:05:35,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:05:35,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:05:35,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:05:35,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91330217] [2020-12-22 05:05:35,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830943878] [2020-12-22 05:05:35,376 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 [2020-12-22 05:05:35,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:05:35,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 05:05:35,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:05:35,660 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 05:05:35,667 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 05:05:35,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:05:35,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 05:05:35,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2020-12-22 05:05:35,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68179113] [2020-12-22 05:05:35,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 05:05:35,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:05:35,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 05:05:35,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-12-22 05:05:35,705 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand 11 states. [2020-12-22 05:05:50,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:05:50,390 INFO L93 Difference]: Finished difference Result 140 states and 157 transitions. [2020-12-22 05:05:50,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 05:05:50,391 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 13 [2020-12-22 05:05:50,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:05:50,393 INFO L225 Difference]: With dead ends: 140 [2020-12-22 05:05:50,393 INFO L226 Difference]: Without dead ends: 100 [2020-12-22 05:05:50,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2020-12-22 05:05:50,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-12-22 05:05:50,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 90. [2020-12-22 05:05:50,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-22 05:05:50,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 97 transitions. [2020-12-22 05:05:50,410 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 97 transitions. Word has length 13 [2020-12-22 05:05:50,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:05:50,411 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 97 transitions. [2020-12-22 05:05:50,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 05:05:50,411 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 97 transitions. [2020-12-22 05:05:50,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 05:05:50,412 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:05:50,412 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:05:50,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-22 05:05:50,627 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:05:50,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:05:50,628 INFO L82 PathProgramCache]: Analyzing trace with hash 2147482631, now seen corresponding path program 1 times [2020-12-22 05:05:50,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:05:50,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018464878] [2020-12-22 05:05:50,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:05:50,668 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:05:50,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1750912064] [2020-12-22 05:05:50,669 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 [2020-12-22 05:05:50,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:05:50,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 05:05:50,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:05:50,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:05:50,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018464878] [2020-12-22 05:05:50,842 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:05:50,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750912064] [2020-12-22 05:05:50,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:05:50,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 05:05:50,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196321453] [2020-12-22 05:05:50,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:05:50,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:05:50,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:05:50,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:05:50,845 INFO L87 Difference]: Start difference. First operand 90 states and 97 transitions. Second operand 6 states. [2020-12-22 05:05:53,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:05:53,502 INFO L93 Difference]: Finished difference Result 94 states and 99 transitions. [2020-12-22 05:05:53,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 05:05:53,505 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-12-22 05:05:53,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:05:53,506 INFO L225 Difference]: With dead ends: 94 [2020-12-22 05:05:53,506 INFO L226 Difference]: Without dead ends: 75 [2020-12-22 05:05:53,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 05:05:53,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-22 05:05:53,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-12-22 05:05:53,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-22 05:05:53,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 80 transitions. [2020-12-22 05:05:53,519 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 80 transitions. Word has length 15 [2020-12-22 05:05:53,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:05:53,519 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 80 transitions. [2020-12-22 05:05:53,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 05:05:53,519 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 80 transitions. [2020-12-22 05:05:53,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 05:05:53,520 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:05:53,520 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:05:53,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:05:53,735 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:05:53,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:05:53,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1165801538, now seen corresponding path program 1 times [2020-12-22 05:05:53,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:05:53,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544984210] [2020-12-22 05:05:53,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:05:53,757 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:05:53,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1082301036] [2020-12-22 05:05:53,761 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 [2020-12-22 05:05:53,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:05:53,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 05:05:53,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:05:53,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 05:05:53,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544984210] [2020-12-22 05:05:53,993 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:05:53,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082301036] [2020-12-22 05:05:53,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:05:53,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 05:05:53,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467156348] [2020-12-22 05:05:53,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:05:53,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:05:53,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:05:53,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:05:53,995 INFO L87 Difference]: Start difference. First operand 75 states and 80 transitions. Second operand 6 states. [2020-12-22 05:06:06,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:06:06,866 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2020-12-22 05:06:06,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 05:06:06,866 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-12-22 05:06:06,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:06:06,868 INFO L225 Difference]: With dead ends: 77 [2020-12-22 05:06:06,868 INFO L226 Difference]: Without dead ends: 75 [2020-12-22 05:06:06,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 05:06:06,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-22 05:06:06,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-12-22 05:06:06,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-22 05:06:06,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2020-12-22 05:06:06,878 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 17 [2020-12-22 05:06:06,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:06:06,878 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2020-12-22 05:06:06,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 05:06:06,879 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2020-12-22 05:06:06,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 05:06:06,879 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:06:06,880 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 05:06:07,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:06:07,081 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:06:07,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:06:07,082 INFO L82 PathProgramCache]: Analyzing trace with hash -957581047, now seen corresponding path program 1 times [2020-12-22 05:06:07,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:06:07,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963339379] [2020-12-22 05:06:07,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:06:07,099 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:06:07,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1151549057] [2020-12-22 05:06:07,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 05:06:07,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:06:07,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-22 05:06:07,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:06:07,588 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 05:06:07,599 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 05:06:07,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:06:07,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963339379] [2020-12-22 05:06:07,639 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:06:07,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151549057] [2020-12-22 05:06:07,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:06:07,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-22 05:06:07,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788132384] [2020-12-22 05:06:07,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 05:06:07,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:06:07,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 05:06:07,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-12-22 05:06:07,650 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand 10 states. [2020-12-22 05:06:23,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:06:23,151 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2020-12-22 05:06:23,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 05:06:23,151 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-12-22 05:06:23,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:06:23,153 INFO L225 Difference]: With dead ends: 98 [2020-12-22 05:06:23,153 INFO L226 Difference]: Without dead ends: 69 [2020-12-22 05:06:23,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-12-22 05:06:23,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-22 05:06:23,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 64. [2020-12-22 05:06:23,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-22 05:06:23,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2020-12-22 05:06:23,170 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 27 [2020-12-22 05:06:23,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:06:23,171 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2020-12-22 05:06:23,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 05:06:23,174 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2020-12-22 05:06:23,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-22 05:06:23,175 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:06:23,175 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:06:23,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:06:23,377 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:06:23,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:06:23,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1112228340, now seen corresponding path program 1 times [2020-12-22 05:06:23,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:06:23,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403963959] [2020-12-22 05:06:23,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:06:23,393 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:06:23,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1867655076] [2020-12-22 05:06:23,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-12-22 05:06:23,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:06:23,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-22 05:06:23,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:06:23,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:06:23,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403963959] [2020-12-22 05:06:23,914 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:06:23,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867655076] [2020-12-22 05:06:23,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:06:23,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-22 05:06:23,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240965426] [2020-12-22 05:06:23,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 05:06:23,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:06:23,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 05:06:23,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-12-22 05:06:23,917 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 9 states. [2020-12-22 05:06:35,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:06:35,942 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-12-22 05:06:35,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 05:06:35,942 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-12-22 05:06:35,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:06:35,944 INFO L225 Difference]: With dead ends: 73 [2020-12-22 05:06:35,944 INFO L226 Difference]: Without dead ends: 71 [2020-12-22 05:06:35,945 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-12-22 05:06:35,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-22 05:06:35,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 66. [2020-12-22 05:06:35,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-22 05:06:35,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-12-22 05:06:35,954 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 29 [2020-12-22 05:06:35,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:06:35,955 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-12-22 05:06:35,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 05:06:35,955 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-12-22 05:06:35,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-22 05:06:35,956 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:06:35,956 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:06:36,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-22 05:06:36,160 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:06:36,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:06:36,161 INFO L82 PathProgramCache]: Analyzing trace with hash 595578799, now seen corresponding path program 1 times [2020-12-22 05:06:36,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:06:36,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857330225] [2020-12-22 05:06:36,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:06:36,179 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:06:36,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1786974509] [2020-12-22 05:06:36,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-12-22 05:06:36,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:06:36,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-22 05:06:36,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:06:37,089 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:06:37,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857330225] [2020-12-22 05:06:37,089 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:06:37,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786974509] [2020-12-22 05:06:37,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:06:37,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-22 05:06:37,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9875163] [2020-12-22 05:06:37,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 05:06:37,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:06:37,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 05:06:37,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-12-22 05:06:37,097 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 10 states. [2020-12-22 05:06:40,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:06:40,953 INFO L93 Difference]: Finished difference Result 83 states and 90 transitions. [2020-12-22 05:06:40,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 05:06:40,953 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-12-22 05:06:40,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:06:40,954 INFO L225 Difference]: With dead ends: 83 [2020-12-22 05:06:40,954 INFO L226 Difference]: Without dead ends: 34 [2020-12-22 05:06:40,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-12-22 05:06:40,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-22 05:06:40,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-12-22 05:06:40,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-22 05:06:40,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 33 transitions. [2020-12-22 05:06:40,961 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 33 transitions. Word has length 31 [2020-12-22 05:06:40,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:06:40,961 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 33 transitions. [2020-12-22 05:06:40,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 05:06:40,961 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 33 transitions. [2020-12-22 05:06:40,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-22 05:06:40,962 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:06:40,962 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:06:41,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:06:41,167 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:06:41,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:06:41,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1120732658, now seen corresponding path program 1 times [2020-12-22 05:06:41,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:06:41,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89894988] [2020-12-22 05:06:41,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:06:41,181 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:06:41,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2096199379] [2020-12-22 05:06:41,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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