/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/geo2-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 07:18:44,383 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 07:18:44,386 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 07:18:44,418 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 07:18:44,419 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 07:18:44,421 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 07:18:44,422 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 07:18:44,425 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 07:18:44,427 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 07:18:44,428 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 07:18:44,429 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 07:18:44,430 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 07:18:44,431 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 07:18:44,432 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 07:18:44,433 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 07:18:44,435 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 07:18:44,447 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 07:18:44,454 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 07:18:44,457 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 07:18:44,461 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 07:18:44,465 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 07:18:44,467 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 07:18:44,470 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 07:18:44,471 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 07:18:44,478 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 07:18:44,487 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 07:18:44,488 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 07:18:44,489 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 07:18:44,493 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 07:18:44,494 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 07:18:44,495 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 07:18:44,495 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 07:18:44,496 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 07:18:44,496 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 07:18:44,497 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 07:18:44,498 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 07:18:44,502 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 07:18:44,551 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 07:18:44,552 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 07:18:44,556 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 07:18:44,557 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 07:18:44,557 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 07:18:44,557 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 07:18:44,557 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 07:18:44,558 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 07:18:44,558 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 07:18:44,558 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 07:18:44,559 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 07:18:44,559 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 07:18:44,560 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 07:18:44,560 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 07:18:44,560 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 07:18:44,560 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 07:18:44,561 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 07:18:44,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 07:18:44,561 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 07:18:44,561 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 07:18:44,561 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 07:18:44,562 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 07:18:44,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 07:18:44,562 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 07:18:44,562 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 07:18:44,562 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-bitabs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 07:18:44,951 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 07:18:44,975 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 07:18:44,978 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 07:18:44,979 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 07:18:44,980 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 07:18:44,981 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/geo2-ll.c [2020-12-23 07:18:45,056 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/3cac17b1a/1e599811c33944ac8c674df67581f43e/FLAGaf8d66bb0 [2020-12-23 07:18:45,674 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 07:18:45,674 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench/geo2-ll.c [2020-12-23 07:18:45,684 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/3cac17b1a/1e599811c33944ac8c674df67581f43e/FLAGaf8d66bb0 [2020-12-23 07:18:46,027 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/3cac17b1a/1e599811c33944ac8c674df67581f43e [2020-12-23 07:18:46,031 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 07:18:46,034 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 07:18:46,035 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 07:18:46,035 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 07:18:46,039 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 07:18:46,040 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:18:46" (1/1) ... [2020-12-23 07:18:46,041 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bc1da47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:18:46, skipping insertion in model container [2020-12-23 07:18:46,041 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:18:46" (1/1) ... [2020-12-23 07:18:46,053 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 07:18:46,070 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 07:18:46,224 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench/geo2-ll.c[525,538] left hand side expression in assignment: lhs: VariableLHS[~z~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] [2020-12-23 07:18:46,239 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:18:46,249 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 07:18:46,262 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench/geo2-ll.c[525,538] left hand side expression in assignment: lhs: VariableLHS[~z~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] [2020-12-23 07:18:46,268 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:18:46,284 INFO L208 MainTranslator]: Completed translation [2020-12-23 07:18:46,284 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:18:46 WrapperNode [2020-12-23 07:18:46,284 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 07:18:46,286 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 07:18:46,286 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 07:18:46,286 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 07:18:46,294 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:18:46" (1/1) ... [2020-12-23 07:18:46,301 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:18:46" (1/1) ... [2020-12-23 07:18:46,320 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 07:18:46,321 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 07:18:46,322 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 07:18:46,322 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 07:18:46,330 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:18:46" (1/1) ... [2020-12-23 07:18:46,331 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:18:46" (1/1) ... [2020-12-23 07:18:46,332 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:18:46" (1/1) ... [2020-12-23 07:18:46,332 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:18:46" (1/1) ... [2020-12-23 07:18:46,336 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:18:46" (1/1) ... [2020-12-23 07:18:46,340 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:18:46" (1/1) ... [2020-12-23 07:18:46,341 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:18:46" (1/1) ... [2020-12-23 07:18:46,343 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 07:18:46,344 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 07:18:46,344 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 07:18:46,344 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 07:18:46,345 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:18:46" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:18:46,451 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 07:18:46,451 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 07:18:46,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 07:18:46,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 07:18:46,674 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 07:18:46,675 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-23 07:18:46,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:18:46 BoogieIcfgContainer [2020-12-23 07:18:46,676 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 07:18:46,678 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 07:18:46,678 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 07:18:46,682 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 07:18:46,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 07:18:46" (1/3) ... [2020-12-23 07:18:46,683 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c73be09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:18:46, skipping insertion in model container [2020-12-23 07:18:46,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:18:46" (2/3) ... [2020-12-23 07:18:46,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c73be09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:18:46, skipping insertion in model container [2020-12-23 07:18:46,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:18:46" (3/3) ... [2020-12-23 07:18:46,686 INFO L111 eAbstractionObserver]: Analyzing ICFG geo2-ll.c [2020-12-23 07:18:46,707 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 07:18:46,712 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-23 07:18:46,733 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-23 07:18:46,775 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 07:18:46,775 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 07:18:46,775 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 07:18:46,775 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 07:18:46,775 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 07:18:46,776 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 07:18:46,776 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 07:18:46,776 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 07:18:46,795 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2020-12-23 07:18:46,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-23 07:18:46,801 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:18:46,802 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-23 07:18:46,803 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:18:46,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:18:46,811 INFO L82 PathProgramCache]: Analyzing trace with hash 28699754, now seen corresponding path program 1 times [2020-12-23 07:18:46,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:18:46,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698628712] [2020-12-23 07:18:46,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:18:46,958 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:18:46,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1145172630] [2020-12-23 07:18:46,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:18:47,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:18:47,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 07:18:47,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:18:47,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:18:47,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698628712] [2020-12-23 07:18:47,161 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:18:47,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145172630] [2020-12-23 07:18:47,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:18:47,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 07:18:47,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394659664] [2020-12-23 07:18:47,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 07:18:47,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:18:47,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 07:18:47,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 07:18:47,187 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 4 states. [2020-12-23 07:18:47,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:18:47,287 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2020-12-23 07:18:47,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 07:18:47,289 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-12-23 07:18:47,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:18:47,299 INFO L225 Difference]: With dead ends: 38 [2020-12-23 07:18:47,300 INFO L226 Difference]: Without dead ends: 15 [2020-12-23 07:18:47,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:18:47,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-23 07:18:47,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2020-12-23 07:18:47,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-23 07:18:47,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-12-23 07:18:47,339 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 5 [2020-12-23 07:18:47,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:18:47,339 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-12-23 07:18:47,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 07:18:47,340 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-12-23 07:18:47,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 07:18:47,340 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:18:47,340 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2020-12-23 07:18:47,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-12-23 07:18:47,556 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:18:47,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:18:47,557 INFO L82 PathProgramCache]: Analyzing trace with hash 300806046, now seen corresponding path program 1 times [2020-12-23 07:18:47,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:18:47,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144977086] [2020-12-23 07:18:47,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:18:47,575 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:18:47,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1099748091] [2020-12-23 07:18:47,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:18:47,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:18:47,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 07:18:47,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:18:47,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:18:47,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144977086] [2020-12-23 07:18:47,780 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:18:47,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099748091] [2020-12-23 07:18:47,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:18:47,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 07:18:47,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125464409] [2020-12-23 07:18:47,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:18:47,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:18:47,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:18:47,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:18:47,784 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 6 states. [2020-12-23 07:18:47,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:18:47,873 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-12-23 07:18:47,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 07:18:47,874 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-12-23 07:18:47,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:18:47,875 INFO L225 Difference]: With dead ends: 24 [2020-12-23 07:18:47,875 INFO L226 Difference]: Without dead ends: 18 [2020-12-23 07:18:47,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:18:47,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-23 07:18:47,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-12-23 07:18:47,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-23 07:18:47,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-12-23 07:18:47,881 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 8 [2020-12-23 07:18:47,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:18:47,882 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-12-23 07:18:47,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:18:47,882 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-12-23 07:18:47,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 07:18:47,883 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:18:47,883 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2020-12-23 07:18:48,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:18:48,098 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:18:48,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:18:48,099 INFO L82 PathProgramCache]: Analyzing trace with hash 2016063466, now seen corresponding path program 2 times [2020-12-23 07:18:48,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:18:48,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678011420] [2020-12-23 07:18:48,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:18:48,114 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:18:48,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1893751534] [2020-12-23 07:18:48,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:18:48,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:18:48,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:18:48,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 07:18:48,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:18:56,847 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:18:56,860 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:18:56,874 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:18:58,902 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:18:58,908 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:19:04,998 WARN L838 $PredicateComparison]: unable to prove that (or (and (exists ((ULTIMATE.start_main_~z~0 Int) (ULTIMATE.start_main_~x~0 Int)) (let ((.cse0 (+ ULTIMATE.start_main_~x~0 (- 1)))) (and (not (= (+ (* ULTIMATE.start_main_~z~0 ULTIMATE.start_main_~x~0) 1) (+ (* ULTIMATE.start_main_~z~0 ULTIMATE.start_main_~z~0 ULTIMATE.start_main_~z~0) ULTIMATE.start_main_~x~0))) (= (mod .cse0 ULTIMATE.start_main_~z~0) 0) (not (= ULTIMATE.start_main_~z~0 0)) (let ((.cse1 (div .cse0 ULTIMATE.start_main_~z~0))) (= (+ (* ULTIMATE.start_main_~z~0 ULTIMATE.start_main_~z~0) .cse1) (+ (* .cse1 ULTIMATE.start_main_~z~0) 1)))))) (= 0 c_ULTIMATE.start___VERIFIER_assert_~cond)) (= 1 c_ULTIMATE.start___VERIFIER_assert_~cond)) is different from false [2020-12-23 07:19:11,110 WARN L838 $PredicateComparison]: unable to prove that (exists ((ULTIMATE.start_main_~z~0 Int) (ULTIMATE.start_main_~x~0 Int)) (let ((.cse0 (+ ULTIMATE.start_main_~x~0 (- 1)))) (and (not (= (+ (* ULTIMATE.start_main_~z~0 ULTIMATE.start_main_~x~0) 1) (+ (* ULTIMATE.start_main_~z~0 ULTIMATE.start_main_~z~0 ULTIMATE.start_main_~z~0) ULTIMATE.start_main_~x~0))) (= (mod .cse0 ULTIMATE.start_main_~z~0) 0) (not (= ULTIMATE.start_main_~z~0 0)) (let ((.cse1 (div .cse0 ULTIMATE.start_main_~z~0))) (= (+ (* ULTIMATE.start_main_~z~0 ULTIMATE.start_main_~z~0) .cse1) (+ (* .cse1 ULTIMATE.start_main_~z~0) 1)))))) is different from false [2020-12-23 07:19:11,123 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 2 times theorem prover too weak. 0 trivial. 2 not checked. [2020-12-23 07:19:11,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678011420] [2020-12-23 07:19:11,124 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:19:11,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893751534] [2020-12-23 07:19:11,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:19:11,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-23 07:19:11,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81849841] [2020-12-23 07:19:11,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 07:19:11,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:19:11,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 07:19:11,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=51, Unknown=6, NotChecked=30, Total=110 [2020-12-23 07:19:11,127 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 11 states. [2020-12-23 07:19:38,365 WARN L197 SmtUtils]: Spent 14.37 s on a formula simplification that was a NOOP. DAG size: 36 [2020-12-23 07:19:48,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:19:48,636 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-12-23 07:19:48,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 07:19:48,638 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-12-23 07:19:48,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:19:48,639 INFO L225 Difference]: With dead ends: 26 [2020-12-23 07:19:48,639 INFO L226 Difference]: Without dead ends: 24 [2020-12-23 07:19:48,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 32.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=8, NotChecked=42, Total=182 [2020-12-23 07:19:48,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-23 07:19:48,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2020-12-23 07:19:48,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-23 07:19:48,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-12-23 07:19:48,645 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 11 [2020-12-23 07:19:48,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:19:48,646 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-12-23 07:19:48,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 07:19:48,646 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-12-23 07:19:48,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 07:19:48,646 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:19:48,647 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 07:19:48,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:19:48,862 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:19:48,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:19:48,863 INFO L82 PathProgramCache]: Analyzing trace with hash -271065837, now seen corresponding path program 1 times [2020-12-23 07:19:48,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:19:48,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538079341] [2020-12-23 07:19:48,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:19:48,879 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:19:48,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [455395214] [2020-12-23 07:19:48,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:19:48,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:19:48,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 07:19:48,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:19:49,000 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 07:19:49,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538079341] [2020-12-23 07:19:49,001 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:19:49,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455395214] [2020-12-23 07:19:49,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:19:49,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 07:19:49,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968266662] [2020-12-23 07:19:49,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 07:19:49,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:19:49,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 07:19:49,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:19:49,003 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 5 states. [2020-12-23 07:19:53,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:19:53,070 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-12-23 07:19:53,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 07:19:53,071 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-12-23 07:19:53,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:19:53,071 INFO L225 Difference]: With dead ends: 19 [2020-12-23 07:19:53,072 INFO L226 Difference]: Without dead ends: 15 [2020-12-23 07:19:53,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:19:53,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-23 07:19:53,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-23 07:19:53,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-23 07:19:53,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-12-23 07:19:53,077 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 14 [2020-12-23 07:19:53,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:19:53,077 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-12-23 07:19:53,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 07:19:53,077 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-12-23 07:19:53,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 07:19:53,078 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:19:53,078 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1] [2020-12-23 07:19:53,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:19:53,279 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:19:53,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:19:53,280 INFO L82 PathProgramCache]: Analyzing trace with hash -271025122, now seen corresponding path program 3 times [2020-12-23 07:19:53,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:19:53,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940678422] [2020-12-23 07:19:53,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:19:53,293 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:19:53,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [710460171] [2020-12-23 07:19:53,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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