/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/mannadiv_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 17:55:37,373 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 17:55:37,377 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 17:55:37,435 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 17:55:37,435 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 17:55:37,440 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 17:55:37,443 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 17:55:37,461 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 17:55:37,464 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 17:55:37,470 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 17:55:37,474 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 17:55:37,476 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 17:55:37,476 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 17:55:37,480 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 17:55:37,482 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 17:55:37,484 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 17:55:37,485 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 17:55:37,488 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 17:55:37,495 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 17:55:37,502 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 17:55:37,504 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 17:55:37,506 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 17:55:37,507 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 17:55:37,510 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 17:55:37,518 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 17:55:37,534 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 17:55:37,535 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 17:55:37,536 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 17:55:37,537 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 17:55:37,581 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 17:55:37,581 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 17:55:37,584 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 17:55:37,585 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 17:55:37,585 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 17:55:37,585 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 17:55:37,585 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 17:55:37,586 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 17:55:37,586 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 17:55:37,586 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 17:55:37,587 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 17:55:37,587 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 17:55:37,588 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 17:55:37,588 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 17:55:37,588 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 17:55:37,588 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 17:55:37,588 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 17:55:37,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:55:37,589 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 17:55:37,589 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 17:55:37,589 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 17:55:37,589 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 17:55:37,590 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 17:55:37,590 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 17:55:37,590 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 17:55:37,590 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 17:55:38,013 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 17:55:38,043 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 17:55:38,046 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 17:55:38,048 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 17:55:38,049 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 17:55:38,049 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound50.c [2021-01-06 17:55:38,135 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/dfcc0a944/625dea66a7b94b2cab2e675161a42390/FLAG6ec2c5380 [2021-01-06 17:55:38,660 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 17:55:38,661 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound50.c [2021-01-06 17:55:38,668 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/dfcc0a944/625dea66a7b94b2cab2e675161a42390/FLAG6ec2c5380 [2021-01-06 17:55:39,024 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/dfcc0a944/625dea66a7b94b2cab2e675161a42390 [2021-01-06 17:55:39,027 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 17:55:39,029 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 17:55:39,031 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 17:55:39,031 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 17:55:39,035 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 17:55:39,035 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:55:39" (1/1) ... [2021-01-06 17:55:39,037 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@461b5ac3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:55:39, skipping insertion in model container [2021-01-06 17:55:39,037 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:55:39" (1/1) ... [2021-01-06 17:55:39,045 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 17:55:39,060 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 17:55:39,213 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-scaling/mannadiv_unwindbound50.c[573,586] left hand side expression in assignment: lhs: VariableLHS[~x1~0,] left hand side expression in assignment: lhs: VariableLHS[~x2~0,] left hand side expression in assignment: lhs: VariableLHS[~y1~0,] left hand side expression in assignment: lhs: VariableLHS[~y2~0,] left hand side expression in assignment: lhs: VariableLHS[~y3~0,] left hand side expression in assignment: lhs: VariableLHS[~y1~0,] left hand side expression in assignment: lhs: VariableLHS[~y2~0,] left hand side expression in assignment: lhs: VariableLHS[~y3~0,] left hand side expression in assignment: lhs: VariableLHS[~y2~0,] left hand side expression in assignment: lhs: VariableLHS[~y3~0,] [2021-01-06 17:55:39,231 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:55:39,242 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 17:55:39,256 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-scaling/mannadiv_unwindbound50.c[573,586] left hand side expression in assignment: lhs: VariableLHS[~x1~0,] left hand side expression in assignment: lhs: VariableLHS[~x2~0,] left hand side expression in assignment: lhs: VariableLHS[~y1~0,] left hand side expression in assignment: lhs: VariableLHS[~y2~0,] left hand side expression in assignment: lhs: VariableLHS[~y3~0,] left hand side expression in assignment: lhs: VariableLHS[~y1~0,] left hand side expression in assignment: lhs: VariableLHS[~y2~0,] left hand side expression in assignment: lhs: VariableLHS[~y3~0,] left hand side expression in assignment: lhs: VariableLHS[~y2~0,] left hand side expression in assignment: lhs: VariableLHS[~y3~0,] [2021-01-06 17:55:39,262 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:55:39,284 INFO L208 MainTranslator]: Completed translation [2021-01-06 17:55:39,284 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:55:39 WrapperNode [2021-01-06 17:55:39,284 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 17:55:39,286 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 17:55:39,286 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 17:55:39,286 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 17:55:39,296 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:55:39" (1/1) ... [2021-01-06 17:55:39,302 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:55:39" (1/1) ... [2021-01-06 17:55:39,322 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 17:55:39,325 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 17:55:39,325 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 17:55:39,325 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 17:55:39,334 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:55:39" (1/1) ... [2021-01-06 17:55:39,335 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:55:39" (1/1) ... [2021-01-06 17:55:39,336 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:55:39" (1/1) ... [2021-01-06 17:55:39,337 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:55:39" (1/1) ... [2021-01-06 17:55:39,341 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:55:39" (1/1) ... [2021-01-06 17:55:39,345 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:55:39" (1/1) ... [2021-01-06 17:55:39,347 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:55:39" (1/1) ... [2021-01-06 17:55:39,348 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 17:55:39,350 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 17:55:39,350 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 17:55:39,350 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 17:55:39,351 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:55:39" (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 [2021-01-06 17:55:39,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 17:55:39,434 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 17:55:39,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 17:55:39,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 17:55:39,679 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 17:55:39,679 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-01-06 17:55:39,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:55:39 BoogieIcfgContainer [2021-01-06 17:55:39,682 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 17:55:39,684 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 17:55:39,684 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 17:55:39,689 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 17:55:39,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 05:55:39" (1/3) ... [2021-01-06 17:55:39,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fbe21b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:55:39, skipping insertion in model container [2021-01-06 17:55:39,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:55:39" (2/3) ... [2021-01-06 17:55:39,691 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fbe21b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:55:39, skipping insertion in model container [2021-01-06 17:55:39,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:55:39" (3/3) ... [2021-01-06 17:55:39,693 INFO L111 eAbstractionObserver]: Analyzing ICFG mannadiv_unwindbound50.c [2021-01-06 17:55:39,700 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 17:55:39,705 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-01-06 17:55:39,729 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-01-06 17:55:39,778 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 17:55:39,778 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 17:55:39,779 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 17:55:39,779 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 17:55:39,817 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 17:55:39,817 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 17:55:39,817 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 17:55:39,818 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 17:55:39,839 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2021-01-06 17:55:39,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 17:55:39,850 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:55:39,854 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:55:39,855 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:55:39,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:55:39,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1235340721, now seen corresponding path program 1 times [2021-01-06 17:55:39,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:55:39,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140684145] [2021-01-06 17:55:39,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:55:40,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:55:40,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:55:40,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140684145] [2021-01-06 17:55:40,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:55:40,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 17:55:40,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161336344] [2021-01-06 17:55:40,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 17:55:40,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:55:40,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 17:55:40,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:55:40,116 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2021-01-06 17:55:40,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:55:40,138 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2021-01-06 17:55:40,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 17:55:40,139 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2021-01-06 17:55:40,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:55:40,149 INFO L225 Difference]: With dead ends: 39 [2021-01-06 17:55:40,149 INFO L226 Difference]: Without dead ends: 17 [2021-01-06 17:55:40,152 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 [2021-01-06 17:55:40,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-01-06 17:55:40,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-01-06 17:55:40,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 17:55:40,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-01-06 17:55:40,190 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 10 [2021-01-06 17:55:40,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:55:40,190 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-01-06 17:55:40,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 17:55:40,190 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-01-06 17:55:40,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 17:55:40,191 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:55:40,191 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:55:40,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 17:55:40,192 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:55:40,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:55:40,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1988288018, now seen corresponding path program 1 times [2021-01-06 17:55:40,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:55:40,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309363654] [2021-01-06 17:55:40,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:55:40,215 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:55:40,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2029918602] [2021-01-06 17:55:40,216 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 [2021-01-06 17:55:40,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:55:40,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 17:55:40,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:55:40,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:55:40,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309363654] [2021-01-06 17:55:40,589 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:55:40,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029918602] [2021-01-06 17:55:40,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:55:40,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-01-06 17:55:40,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489190821] [2021-01-06 17:55:40,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:55:40,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:55:40,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:55:40,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:55:40,594 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 8 states. [2021-01-06 17:55:40,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:55:40,964 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2021-01-06 17:55:40,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:55:40,965 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2021-01-06 17:55:40,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:55:40,967 INFO L225 Difference]: With dead ends: 32 [2021-01-06 17:55:40,968 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 17:55:40,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:55:40,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 17:55:40,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 20. [2021-01-06 17:55:40,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-01-06 17:55:40,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-01-06 17:55:40,984 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 10 [2021-01-06 17:55:40,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:55:40,984 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-01-06 17:55:40,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:55:40,986 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-01-06 17:55:40,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 17:55:40,987 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:55:40,988 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:55:41,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 17:55:41,205 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:55:41,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:55:41,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1507424085, now seen corresponding path program 1 times [2021-01-06 17:55:41,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:55:41,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275982848] [2021-01-06 17:55:41,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:55:41,246 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:55:41,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1987931644] [2021-01-06 17:55:41,248 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 [2021-01-06 17:55:41,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:55:41,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 17:55:41,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:55:41,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:55:41,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275982848] [2021-01-06 17:55:41,327 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:55:41,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987931644] [2021-01-06 17:55:41,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:55:41,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 17:55:41,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037644873] [2021-01-06 17:55:41,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 17:55:41,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:55:41,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 17:55:41,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 17:55:41,330 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 4 states. [2021-01-06 17:55:41,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:55:41,343 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2021-01-06 17:55:41,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 17:55:41,344 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2021-01-06 17:55:41,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:55:41,344 INFO L225 Difference]: With dead ends: 24 [2021-01-06 17:55:41,345 INFO L226 Difference]: Without dead ends: 20 [2021-01-06 17:55:41,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 17:55:41,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-01-06 17:55:41,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-01-06 17:55:41,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-01-06 17:55:41,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-01-06 17:55:41,350 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 11 [2021-01-06 17:55:41,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:55:41,351 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-01-06 17:55:41,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 17:55:41,351 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-01-06 17:55:41,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 17:55:41,352 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:55:41,352 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:55:41,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:55:41,567 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:55:41,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:55:41,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1189458428, now seen corresponding path program 1 times [2021-01-06 17:55:41,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:55:41,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849619945] [2021-01-06 17:55:41,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:55:41,584 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:55:41,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1812783644] [2021-01-06 17:55:41,585 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 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 [2021-01-06 17:55:41,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:55:41,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 17:55:41,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:55:41,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:55:41,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849619945] [2021-01-06 17:55:41,777 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:55:41,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812783644] [2021-01-06 17:55:41,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:55:41,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-01-06 17:55:41,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115286140] [2021-01-06 17:55:41,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 17:55:41,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:55:41,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 17:55:41,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:55:41,780 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 9 states. [2021-01-06 17:55:41,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:55:41,920 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2021-01-06 17:55:41,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:55:41,921 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2021-01-06 17:55:41,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:55:41,922 INFO L225 Difference]: With dead ends: 24 [2021-01-06 17:55:41,922 INFO L226 Difference]: Without dead ends: 18 [2021-01-06 17:55:41,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-01-06 17:55:41,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-01-06 17:55:41,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-01-06 17:55:41,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 17:55:41,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-01-06 17:55:41,927 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2021-01-06 17:55:41,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:55:41,928 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-01-06 17:55:41,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 17:55:41,928 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-01-06 17:55:41,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 17:55:41,929 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:55:41,929 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:55:42,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:55:42,144 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:55:42,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:55:42,146 INFO L82 PathProgramCache]: Analyzing trace with hash -132612007, now seen corresponding path program 1 times [2021-01-06 17:55:42,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:55:42,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019968794] [2021-01-06 17:55:42,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:55:42,162 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:55:42,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1784298316] [2021-01-06 17:55:42,163 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 [2021-01-06 17:55:42,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:55:42,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 17:55:42,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:55:42,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:55:42,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019968794] [2021-01-06 17:55:42,259 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:55:42,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784298316] [2021-01-06 17:55:42,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:55:42,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-01-06 17:55:42,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925276594] [2021-01-06 17:55:42,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:55:42,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:55:42,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:55:42,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:55:42,261 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 5 states. [2021-01-06 17:55:42,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:55:42,283 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-01-06 17:55:42,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:55:42,284 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2021-01-06 17:55:42,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:55:42,285 INFO L225 Difference]: With dead ends: 26 [2021-01-06 17:55:42,285 INFO L226 Difference]: Without dead ends: 22 [2021-01-06 17:55:42,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:55:42,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-01-06 17:55:42,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-01-06 17:55:42,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-01-06 17:55:42,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-01-06 17:55:42,291 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 16 [2021-01-06 17:55:42,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:55:42,291 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-01-06 17:55:42,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:55:42,291 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-01-06 17:55:42,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 17:55:42,292 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:55:42,292 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:55:42,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:55:42,507 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:55:42,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:55:42,509 INFO L82 PathProgramCache]: Analyzing trace with hash -625728149, now seen corresponding path program 2 times [2021-01-06 17:55:42,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:55:42,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031834015] [2021-01-06 17:55:42,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:55:42,523 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:55:42,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1914086822] [2021-01-06 17:55:42,524 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 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 [2021-01-06 17:55:42,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:55:42,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:55:42,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 17:55:42,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:55:42,636 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:55:42,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031834015] [2021-01-06 17:55:42,637 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:55:42,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914086822] [2021-01-06 17:55:42,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:55:42,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-01-06 17:55:42,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493877991] [2021-01-06 17:55:42,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 17:55:42,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:55:42,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 17:55:42,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:55:42,639 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 6 states. [2021-01-06 17:55:42,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:55:42,677 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2021-01-06 17:55:42,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:55:42,677 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2021-01-06 17:55:42,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:55:42,678 INFO L225 Difference]: With dead ends: 31 [2021-01-06 17:55:42,678 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 17:55:42,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:55:42,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 17:55:42,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-01-06 17:55:42,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 17:55:42,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-01-06 17:55:42,685 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 21 [2021-01-06 17:55:42,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:55:42,685 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-01-06 17:55:42,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 17:55:42,686 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-01-06 17:55:42,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 17:55:42,686 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:55:42,687 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:55:42,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 17:55:42,902 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:55:42,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:55:42,903 INFO L82 PathProgramCache]: Analyzing trace with hash 256826265, now seen corresponding path program 3 times [2021-01-06 17:55:42,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:55:42,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342607092] [2021-01-06 17:55:42,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:55:42,920 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:55:42,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1316326013] [2021-01-06 17:55:42,920 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 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 [2021-01-06 17:55:42,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 17:55:42,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:55:42,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:55:42,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:55:43,064 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:55:43,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342607092] [2021-01-06 17:55:43,065 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:55:43,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316326013] [2021-01-06 17:55:43,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:55:43,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 17:55:43,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442882429] [2021-01-06 17:55:43,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 17:55:43,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:55:43,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 17:55:43,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:55:43,067 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 7 states. [2021-01-06 17:55:43,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:55:43,121 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2021-01-06 17:55:43,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:55:43,121 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2021-01-06 17:55:43,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:55:43,122 INFO L225 Difference]: With dead ends: 36 [2021-01-06 17:55:43,122 INFO L226 Difference]: Without dead ends: 32 [2021-01-06 17:55:43,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:55:43,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-01-06 17:55:43,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-01-06 17:55:43,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-01-06 17:55:43,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-01-06 17:55:43,130 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 26 [2021-01-06 17:55:43,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:55:43,147 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-01-06 17:55:43,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 17:55:43,148 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-01-06 17:55:43,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 17:55:43,149 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:55:43,149 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:55:43,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:55:43,351 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:55:43,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:55:43,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1955278293, now seen corresponding path program 4 times [2021-01-06 17:55:43,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:55:43,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837726209] [2021-01-06 17:55:43,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:55:43,366 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:55:43,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [34270967] [2021-01-06 17:55:43,367 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:55:43,423 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:55:43,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:55:43,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:55:43,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:55:43,503 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:55:43,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837726209] [2021-01-06 17:55:43,503 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:55:43,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34270967] [2021-01-06 17:55:43,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:55:43,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 17:55:43,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109694230] [2021-01-06 17:55:43,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:55:43,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:55:43,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:55:43,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:55:43,506 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 8 states. [2021-01-06 17:55:43,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:55:43,566 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2021-01-06 17:55:43,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:55:43,567 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2021-01-06 17:55:43,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:55:43,568 INFO L225 Difference]: With dead ends: 41 [2021-01-06 17:55:43,568 INFO L226 Difference]: Without dead ends: 37 [2021-01-06 17:55:43,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-01-06 17:55:43,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-01-06 17:55:43,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-01-06 17:55:43,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:55:43,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2021-01-06 17:55:43,576 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 31 [2021-01-06 17:55:43,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:55:43,577 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2021-01-06 17:55:43,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:55:43,577 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2021-01-06 17:55:43,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 17:55:43,578 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:55:43,578 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:55:43,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:55:43,792 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:55:43,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:55:43,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1615059239, now seen corresponding path program 5 times [2021-01-06 17:55:43,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:55:43,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206000287] [2021-01-06 17:55:43,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:55:43,806 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:55:43,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1035960166] [2021-01-06 17:55:43,807 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:55:43,872 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 17:55:43,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:55:43,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 17:55:43,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:55:43,981 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:55:43,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206000287] [2021-01-06 17:55:43,982 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:55:43,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035960166] [2021-01-06 17:55:43,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:55:43,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 17:55:43,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21215732] [2021-01-06 17:55:43,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 17:55:43,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:55:43,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 17:55:43,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:55:43,984 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 9 states. [2021-01-06 17:55:44,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:55:44,060 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2021-01-06 17:55:44,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 17:55:44,060 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2021-01-06 17:55:44,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:55:44,061 INFO L225 Difference]: With dead ends: 46 [2021-01-06 17:55:44,062 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 17:55:44,062 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-01-06 17:55:44,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 17:55:44,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-01-06 17:55:44,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-01-06 17:55:44,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2021-01-06 17:55:44,071 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 36 [2021-01-06 17:55:44,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:55:44,071 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2021-01-06 17:55:44,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 17:55:44,071 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2021-01-06 17:55:44,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 17:55:44,073 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:55:44,073 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:55:44,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 17:55:44,287 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:55:44,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:55:44,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1613459733, now seen corresponding path program 6 times [2021-01-06 17:55:44,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:55:44,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046709401] [2021-01-06 17:55:44,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:55:44,303 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:55:44,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1663040205] [2021-01-06 17:55:44,306 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:55:44,390 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 17:55:44,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:55:44,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 17:55:44,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:55:44,518 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:55:44,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046709401] [2021-01-06 17:55:44,518 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:55:44,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663040205] [2021-01-06 17:55:44,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:55:44,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 17:55:44,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882562001] [2021-01-06 17:55:44,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 17:55:44,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:55:44,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 17:55:44,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:55:44,521 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 10 states. [2021-01-06 17:55:44,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:55:44,642 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2021-01-06 17:55:44,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 17:55:44,642 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2021-01-06 17:55:44,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:55:44,646 INFO L225 Difference]: With dead ends: 51 [2021-01-06 17:55:44,647 INFO L226 Difference]: Without dead ends: 47 [2021-01-06 17:55:44,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-01-06 17:55:44,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-01-06 17:55:44,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-01-06 17:55:44,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-01-06 17:55:44,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2021-01-06 17:55:44,671 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 41 [2021-01-06 17:55:44,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:55:44,671 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2021-01-06 17:55:44,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 17:55:44,672 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2021-01-06 17:55:44,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 17:55:44,673 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:55:44,675 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:55:44,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:55:44,884 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:55:44,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:55:44,885 INFO L82 PathProgramCache]: Analyzing trace with hash -2055970279, now seen corresponding path program 7 times [2021-01-06 17:55:44,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:55:44,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527950688] [2021-01-06 17:55:44,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:55:44,903 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:55:44,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1305102874] [2021-01-06 17:55:44,903 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:55:44,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:55:44,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 17:55:44,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:55:45,130 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:55:45,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527950688] [2021-01-06 17:55:45,131 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:55:45,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305102874] [2021-01-06 17:55:45,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:55:45,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 17:55:45,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935286777] [2021-01-06 17:55:45,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 17:55:45,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:55:45,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 17:55:45,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:55:45,134 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand 11 states. [2021-01-06 17:55:45,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:55:45,245 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2021-01-06 17:55:45,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 17:55:45,246 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 46 [2021-01-06 17:55:45,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:55:45,247 INFO L225 Difference]: With dead ends: 56 [2021-01-06 17:55:45,247 INFO L226 Difference]: Without dead ends: 52 [2021-01-06 17:55:45,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2021-01-06 17:55:45,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-06 17:55:45,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-01-06 17:55:45,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-01-06 17:55:45,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2021-01-06 17:55:45,256 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 46 [2021-01-06 17:55:45,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:55:45,256 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2021-01-06 17:55:45,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 17:55:45,257 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2021-01-06 17:55:45,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 17:55:45,258 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:55:45,258 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:55:45,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:55:45,473 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:55:45,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:55:45,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1472242773, now seen corresponding path program 8 times [2021-01-06 17:55:45,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:55:45,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824235640] [2021-01-06 17:55:45,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:55:45,487 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:55:45,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [104492419] [2021-01-06 17:55:45,488 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:55:45,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:55:45,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:55:45,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 17:55:45,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:55:45,722 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:55:45,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824235640] [2021-01-06 17:55:45,723 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:55:45,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104492419] [2021-01-06 17:55:45,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:55:45,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-01-06 17:55:45,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187236828] [2021-01-06 17:55:45,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 17:55:45,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:55:45,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 17:55:45,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-01-06 17:55:45,726 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand 12 states. [2021-01-06 17:55:45,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:55:45,883 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2021-01-06 17:55:45,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 17:55:45,884 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2021-01-06 17:55:45,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:55:45,885 INFO L225 Difference]: With dead ends: 61 [2021-01-06 17:55:45,885 INFO L226 Difference]: Without dead ends: 57 [2021-01-06 17:55:45,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-01-06 17:55:45,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-01-06 17:55:45,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-01-06 17:55:45,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-01-06 17:55:45,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2021-01-06 17:55:45,895 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 51 [2021-01-06 17:55:45,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:55:45,895 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2021-01-06 17:55:45,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 17:55:45,895 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2021-01-06 17:55:45,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-06 17:55:45,896 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:55:45,896 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:55:46,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 17:55:46,110 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:55:46,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:55:46,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1819570855, now seen corresponding path program 9 times [2021-01-06 17:55:46,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:55:46,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902842331] [2021-01-06 17:55:46,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:55:46,123 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:55:46,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2132870561] [2021-01-06 17:55:46,124 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:55:46,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-01-06 17:55:46,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:55:46,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 17:55:46,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:55:46,395 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:55:46,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902842331] [2021-01-06 17:55:46,395 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:55:46,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132870561] [2021-01-06 17:55:46,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:55:46,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-01-06 17:55:46,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177678774] [2021-01-06 17:55:46,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 17:55:46,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:55:46,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 17:55:46,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:55:46,398 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand 13 states. [2021-01-06 17:55:46,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:55:46,540 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2021-01-06 17:55:46,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 17:55:46,541 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2021-01-06 17:55:46,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:55:46,541 INFO L225 Difference]: With dead ends: 66 [2021-01-06 17:55:46,541 INFO L226 Difference]: Without dead ends: 62 [2021-01-06 17:55:46,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2021-01-06 17:55:46,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-01-06 17:55:46,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-01-06 17:55:46,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-01-06 17:55:46,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2021-01-06 17:55:46,553 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 56 [2021-01-06 17:55:46,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:55:46,553 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2021-01-06 17:55:46,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 17:55:46,554 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2021-01-06 17:55:46,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-06 17:55:46,555 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:55:46,556 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:55:46,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 17:55:46,772 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:55:46,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:55:46,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1641990037, now seen corresponding path program 10 times [2021-01-06 17:55:46,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:55:46,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718049958] [2021-01-06 17:55:46,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:55:46,785 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:55:46,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1569243536] [2021-01-06 17:55:46,785 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:55:46,867 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:55:46,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:55:46,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 17:55:46,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:55:47,087 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:55:47,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718049958] [2021-01-06 17:55:47,088 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:55:47,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569243536] [2021-01-06 17:55:47,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:55:47,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-01-06 17:55:47,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350481156] [2021-01-06 17:55:47,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 17:55:47,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:55:47,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 17:55:47,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-01-06 17:55:47,090 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand 14 states. [2021-01-06 17:55:47,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:55:47,253 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2021-01-06 17:55:47,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 17:55:47,253 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 61 [2021-01-06 17:55:47,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:55:47,254 INFO L225 Difference]: With dead ends: 71 [2021-01-06 17:55:47,254 INFO L226 Difference]: Without dead ends: 67 [2021-01-06 17:55:47,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2021-01-06 17:55:47,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-01-06 17:55:47,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-01-06 17:55:47,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-01-06 17:55:47,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2021-01-06 17:55:47,266 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 61 [2021-01-06 17:55:47,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:55:47,266 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2021-01-06 17:55:47,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 17:55:47,266 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2021-01-06 17:55:47,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-06 17:55:47,268 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:55:47,268 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:55:47,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 17:55:47,482 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:55:47,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:55:47,483 INFO L82 PathProgramCache]: Analyzing trace with hash -736778087, now seen corresponding path program 11 times [2021-01-06 17:55:47,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:55:47,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912442373] [2021-01-06 17:55:47,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:55:47,498 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:55:47,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [480111623] [2021-01-06 17:55:47,501 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:55:47,601 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-01-06 17:55:47,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:55:47,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 17:55:47,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:55:47,808 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:55:47,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912442373] [2021-01-06 17:55:47,809 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:55:47,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480111623] [2021-01-06 17:55:47,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:55:47,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-01-06 17:55:47,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800811048] [2021-01-06 17:55:47,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 17:55:47,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:55:47,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 17:55:47,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:55:47,811 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand 15 states. [2021-01-06 17:55:47,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:55:47,987 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2021-01-06 17:55:47,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 17:55:47,988 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 66 [2021-01-06 17:55:47,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:55:47,989 INFO L225 Difference]: With dead ends: 76 [2021-01-06 17:55:47,989 INFO L226 Difference]: Without dead ends: 72 [2021-01-06 17:55:47,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=247, Invalid=403, Unknown=0, NotChecked=0, Total=650 [2021-01-06 17:55:47,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-01-06 17:55:48,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-01-06 17:55:48,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-01-06 17:55:48,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 84 transitions. [2021-01-06 17:55:48,002 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 84 transitions. Word has length 66 [2021-01-06 17:55:48,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:55:48,003 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 84 transitions. [2021-01-06 17:55:48,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 17:55:48,003 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 84 transitions. [2021-01-06 17:55:48,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-06 17:55:48,007 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:55:48,007 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:55:48,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:55:48,221 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:55:48,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:55:48,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1545198293, now seen corresponding path program 12 times [2021-01-06 17:55:48,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:55:48,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268967264] [2021-01-06 17:55:48,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:55:48,252 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:55:48,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1629492173] [2021-01-06 17:55:48,252 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:55:48,370 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-01-06 17:55:48,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:55:48,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 17:55:48,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:55:48,596 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:55:48,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268967264] [2021-01-06 17:55:48,597 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:55:48,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629492173] [2021-01-06 17:55:48,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:55:48,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-01-06 17:55:48,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128221444] [2021-01-06 17:55:48,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 17:55:48,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:55:48,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 17:55:48,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-01-06 17:55:48,599 INFO L87 Difference]: Start difference. First operand 72 states and 84 transitions. Second operand 16 states. [2021-01-06 17:55:48,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:55:48,800 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2021-01-06 17:55:48,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 17:55:48,800 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 71 [2021-01-06 17:55:48,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:55:48,801 INFO L225 Difference]: With dead ends: 81 [2021-01-06 17:55:48,801 INFO L226 Difference]: Without dead ends: 77 [2021-01-06 17:55:48,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=287, Invalid=469, Unknown=0, NotChecked=0, Total=756 [2021-01-06 17:55:48,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-01-06 17:55:48,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-01-06 17:55:48,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2021-01-06 17:55:48,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 90 transitions. [2021-01-06 17:55:48,811 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 90 transitions. Word has length 71 [2021-01-06 17:55:48,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:55:48,811 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 90 transitions. [2021-01-06 17:55:48,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 17:55:48,811 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 90 transitions. [2021-01-06 17:55:48,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-06 17:55:48,812 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:55:48,812 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:55:49,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 17:55:49,026 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:55:49,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:55:49,027 INFO L82 PathProgramCache]: Analyzing trace with hash -936987687, now seen corresponding path program 13 times [2021-01-06 17:55:49,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:55:49,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086113591] [2021-01-06 17:55:49,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:55:49,038 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:55:49,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [804040126] [2021-01-06 17:55:49,039 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:55:49,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:55:49,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 29 conjunts are in the unsatisfiable core [2021-01-06 17:55:49,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:55:49,365 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:55:49,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086113591] [2021-01-06 17:55:49,365 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:55:49,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804040126] [2021-01-06 17:55:49,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:55:49,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-01-06 17:55:49,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351867747] [2021-01-06 17:55:49,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 17:55:49,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:55:49,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 17:55:49,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:55:49,367 INFO L87 Difference]: Start difference. First operand 77 states and 90 transitions. Second operand 17 states. [2021-01-06 17:55:49,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:55:49,581 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2021-01-06 17:55:49,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 17:55:49,581 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 76 [2021-01-06 17:55:49,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:55:49,582 INFO L225 Difference]: With dead ends: 86 [2021-01-06 17:55:49,582 INFO L226 Difference]: Without dead ends: 82 [2021-01-06 17:55:49,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=330, Invalid=540, Unknown=0, NotChecked=0, Total=870 [2021-01-06 17:55:49,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-01-06 17:55:49,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-01-06 17:55:49,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2021-01-06 17:55:49,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 96 transitions. [2021-01-06 17:55:49,591 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 96 transitions. Word has length 76 [2021-01-06 17:55:49,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:55:49,592 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 96 transitions. [2021-01-06 17:55:49,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 17:55:49,592 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 96 transitions. [2021-01-06 17:55:49,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-06 17:55:49,593 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:55:49,593 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:55:49,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 17:55:49,807 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:55:49,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:55:49,808 INFO L82 PathProgramCache]: Analyzing trace with hash -990240277, now seen corresponding path program 14 times [2021-01-06 17:55:49,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:55:49,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736398612] [2021-01-06 17:55:49,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:55:49,819 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:55:49,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [862986019] [2021-01-06 17:55:49,819 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:55:49,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:55:49,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:55:49,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 17:55:49,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:55:50,183 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:55:50,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736398612] [2021-01-06 17:55:50,184 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:55:50,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862986019] [2021-01-06 17:55:50,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:55:50,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-01-06 17:55:50,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899460487] [2021-01-06 17:55:50,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 17:55:50,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:55:50,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 17:55:50,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-01-06 17:55:50,186 INFO L87 Difference]: Start difference. First operand 82 states and 96 transitions. Second operand 18 states. [2021-01-06 17:55:50,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:55:50,421 INFO L93 Difference]: Finished difference Result 91 states and 106 transitions. [2021-01-06 17:55:50,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 17:55:50,422 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 81 [2021-01-06 17:55:50,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:55:50,423 INFO L225 Difference]: With dead ends: 91 [2021-01-06 17:55:50,423 INFO L226 Difference]: Without dead ends: 87 [2021-01-06 17:55:50,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=376, Invalid=616, Unknown=0, NotChecked=0, Total=992 [2021-01-06 17:55:50,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-01-06 17:55:50,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-01-06 17:55:50,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2021-01-06 17:55:50,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 102 transitions. [2021-01-06 17:55:50,431 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 102 transitions. Word has length 81 [2021-01-06 17:55:50,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:55:50,432 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 102 transitions. [2021-01-06 17:55:50,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 17:55:50,432 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 102 transitions. [2021-01-06 17:55:50,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-06 17:55:50,433 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:55:50,433 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:55:50,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 17:55:50,647 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:55:50,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:55:50,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1479364839, now seen corresponding path program 15 times [2021-01-06 17:55:50,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:55:50,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630408686] [2021-01-06 17:55:50,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:55:50,662 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:55:50,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2089404381] [2021-01-06 17:55:50,662 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:55:50,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-01-06 17:55:50,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:55:50,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 33 conjunts are in the unsatisfiable core [2021-01-06 17:55:50,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:55:51,077 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:55:51,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630408686] [2021-01-06 17:55:51,077 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:55:51,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089404381] [2021-01-06 17:55:51,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:55:51,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-01-06 17:55:51,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712748169] [2021-01-06 17:55:51,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:55:51,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:55:51,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:55:51,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:55:51,080 INFO L87 Difference]: Start difference. First operand 87 states and 102 transitions. Second operand 19 states. [2021-01-06 17:55:51,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:55:51,384 INFO L93 Difference]: Finished difference Result 96 states and 112 transitions. [2021-01-06 17:55:51,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 17:55:51,385 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 86 [2021-01-06 17:55:51,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:55:51,386 INFO L225 Difference]: With dead ends: 96 [2021-01-06 17:55:51,386 INFO L226 Difference]: Without dead ends: 92 [2021-01-06 17:55:51,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=425, Invalid=697, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 17:55:51,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-01-06 17:55:51,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-01-06 17:55:51,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2021-01-06 17:55:51,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 108 transitions. [2021-01-06 17:55:51,398 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 108 transitions. Word has length 86 [2021-01-06 17:55:51,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:55:51,398 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 108 transitions. [2021-01-06 17:55:51,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:55:51,398 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 108 transitions. [2021-01-06 17:55:51,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-01-06 17:55:51,399 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:55:51,399 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:55:51,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:55:51,614 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:55:51,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:55:51,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1245106517, now seen corresponding path program 16 times [2021-01-06 17:55:51,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:55:51,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818492780] [2021-01-06 17:55:51,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:55:51,631 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:55:51,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [126967582] [2021-01-06 17:55:51,631 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:55:51,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:55:51,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:55:51,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 35 conjunts are in the unsatisfiable core [2021-01-06 17:55:51,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:55:52,040 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 632 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:55:52,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818492780] [2021-01-06 17:55:52,040 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:55:52,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126967582] [2021-01-06 17:55:52,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:55:52,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-01-06 17:55:52,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943693808] [2021-01-06 17:55:52,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 17:55:52,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:55:52,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 17:55:52,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-01-06 17:55:52,043 INFO L87 Difference]: Start difference. First operand 92 states and 108 transitions. Second operand 20 states. [2021-01-06 17:55:52,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:55:52,373 INFO L93 Difference]: Finished difference Result 101 states and 118 transitions. [2021-01-06 17:55:52,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-06 17:55:52,374 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 91 [2021-01-06 17:55:52,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:55:52,375 INFO L225 Difference]: With dead ends: 101 [2021-01-06 17:55:52,375 INFO L226 Difference]: Without dead ends: 97 [2021-01-06 17:55:52,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=477, Invalid=783, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 17:55:52,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-01-06 17:55:52,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2021-01-06 17:55:52,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2021-01-06 17:55:52,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 114 transitions. [2021-01-06 17:55:52,384 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 114 transitions. Word has length 91 [2021-01-06 17:55:52,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:55:52,384 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 114 transitions. [2021-01-06 17:55:52,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 17:55:52,384 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 114 transitions. [2021-01-06 17:55:52,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-01-06 17:55:52,385 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:55:52,385 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:55:52,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:55:52,599 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:55:52,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:55:52,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1574069671, now seen corresponding path program 17 times [2021-01-06 17:55:52,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:55:52,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564426487] [2021-01-06 17:55:52,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:55:52,610 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:55:52,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1179531314] [2021-01-06 17:55:52,611 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:55:52,728 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-01-06 17:55:52,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:55:52,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 37 conjunts are in the unsatisfiable core [2021-01-06 17:55:52,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:55:53,046 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 714 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:55:53,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564426487] [2021-01-06 17:55:53,046 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:55:53,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179531314] [2021-01-06 17:55:53,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:55:53,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-01-06 17:55:53,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415066961] [2021-01-06 17:55:53,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:55:53,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:55:53,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:55:53,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:55:53,049 INFO L87 Difference]: Start difference. First operand 97 states and 114 transitions. Second operand 21 states. [2021-01-06 17:55:53,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:55:53,407 INFO L93 Difference]: Finished difference Result 106 states and 124 transitions. [2021-01-06 17:55:53,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-06 17:55:53,407 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 96 [2021-01-06 17:55:53,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:55:53,408 INFO L225 Difference]: With dead ends: 106 [2021-01-06 17:55:53,408 INFO L226 Difference]: Without dead ends: 102 [2021-01-06 17:55:53,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=532, Invalid=874, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 17:55:53,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-01-06 17:55:53,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2021-01-06 17:55:53,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2021-01-06 17:55:53,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 120 transitions. [2021-01-06 17:55:53,417 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 120 transitions. Word has length 96 [2021-01-06 17:55:53,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:55:53,418 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 120 transitions. [2021-01-06 17:55:53,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:55:53,418 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 120 transitions. [2021-01-06 17:55:53,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-01-06 17:55:53,419 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:55:53,419 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:55:53,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-06 17:55:53,633 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:55:53,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:55:53,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1816179861, now seen corresponding path program 18 times [2021-01-06 17:55:53,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:55:53,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094189701] [2021-01-06 17:55:53,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:55:53,644 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:55:53,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [794660828] [2021-01-06 17:55:53,644 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:55:53,814 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-01-06 17:55:53,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:55:53,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 39 conjunts are in the unsatisfiable core [2021-01-06 17:55:53,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:55:54,161 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:55:54,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094189701] [2021-01-06 17:55:54,162 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:55:54,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794660828] [2021-01-06 17:55:54,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:55:54,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-01-06 17:55:54,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982944812] [2021-01-06 17:55:54,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 17:55:54,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:55:54,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 17:55:54,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-01-06 17:55:54,164 INFO L87 Difference]: Start difference. First operand 102 states and 120 transitions. Second operand 22 states. [2021-01-06 17:55:54,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:55:54,503 INFO L93 Difference]: Finished difference Result 111 states and 130 transitions. [2021-01-06 17:55:54,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-06 17:55:54,504 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 101 [2021-01-06 17:55:54,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:55:54,508 INFO L225 Difference]: With dead ends: 111 [2021-01-06 17:55:54,508 INFO L226 Difference]: Without dead ends: 107 [2021-01-06 17:55:54,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=590, Invalid=970, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 17:55:54,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-01-06 17:55:54,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-01-06 17:55:54,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2021-01-06 17:55:54,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 126 transitions. [2021-01-06 17:55:54,519 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 126 transitions. Word has length 101 [2021-01-06 17:55:54,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:55:54,520 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 126 transitions. [2021-01-06 17:55:54,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 17:55:54,520 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 126 transitions. [2021-01-06 17:55:54,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-01-06 17:55:54,521 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:55:54,521 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:55:54,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 17:55:54,736 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:55:54,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:55:54,737 INFO L82 PathProgramCache]: Analyzing trace with hash 491484569, now seen corresponding path program 19 times [2021-01-06 17:55:54,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:55:54,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863544369] [2021-01-06 17:55:54,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:55:54,747 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:55:54,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1267260251] [2021-01-06 17:55:54,747 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:55:54,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:55:54,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 41 conjunts are in the unsatisfiable core [2021-01-06 17:55:54,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:55:55,271 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 0 proven. 893 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:55:55,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863544369] [2021-01-06 17:55:55,272 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:55:55,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267260251] [2021-01-06 17:55:55,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:55:55,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-01-06 17:55:55,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54429275] [2021-01-06 17:55:55,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 17:55:55,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:55:55,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 17:55:55,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-01-06 17:55:55,274 INFO L87 Difference]: Start difference. First operand 107 states and 126 transitions. Second operand 23 states. [2021-01-06 17:55:55,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:55:55,676 INFO L93 Difference]: Finished difference Result 116 states and 136 transitions. [2021-01-06 17:55:55,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-06 17:55:55,676 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 106 [2021-01-06 17:55:55,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:55:55,677 INFO L225 Difference]: With dead ends: 116 [2021-01-06 17:55:55,678 INFO L226 Difference]: Without dead ends: 112 [2021-01-06 17:55:55,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=651, Invalid=1071, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 17:55:55,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-01-06 17:55:55,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2021-01-06 17:55:55,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2021-01-06 17:55:55,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 132 transitions. [2021-01-06 17:55:55,688 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 132 transitions. Word has length 106 [2021-01-06 17:55:55,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:55:55,689 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 132 transitions. [2021-01-06 17:55:55,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 17:55:55,689 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 132 transitions. [2021-01-06 17:55:55,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-01-06 17:55:55,690 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:55:55,690 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:55:55,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:55:55,904 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:55:55,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:55:55,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1521977301, now seen corresponding path program 20 times [2021-01-06 17:55:55,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:55:55,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038886312] [2021-01-06 17:55:55,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:55:55,914 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:55:55,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [233557785] [2021-01-06 17:55:55,914 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:55:56,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:55:56,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:55:56,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 43 conjunts are in the unsatisfiable core [2021-01-06 17:55:56,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:55:56,470 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:55:56,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038886312] [2021-01-06 17:55:56,471 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:55:56,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233557785] [2021-01-06 17:55:56,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:55:56,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-01-06 17:55:56,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518799867] [2021-01-06 17:55:56,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 17:55:56,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:55:56,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 17:55:56,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2021-01-06 17:55:56,473 INFO L87 Difference]: Start difference. First operand 112 states and 132 transitions. Second operand 24 states. [2021-01-06 17:55:56,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:55:56,899 INFO L93 Difference]: Finished difference Result 121 states and 142 transitions. [2021-01-06 17:55:56,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-06 17:55:56,900 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 111 [2021-01-06 17:55:56,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:55:56,901 INFO L225 Difference]: With dead ends: 121 [2021-01-06 17:55:56,901 INFO L226 Difference]: Without dead ends: 117 [2021-01-06 17:55:56,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=715, Invalid=1177, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 17:55:56,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-01-06 17:55:56,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2021-01-06 17:55:56,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2021-01-06 17:55:56,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 138 transitions. [2021-01-06 17:55:56,911 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 138 transitions. Word has length 111 [2021-01-06 17:55:56,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:55:56,911 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 138 transitions. [2021-01-06 17:55:56,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 17:55:56,911 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 138 transitions. [2021-01-06 17:55:56,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-01-06 17:55:56,912 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:55:56,912 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:55:57,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-06 17:55:57,127 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:55:57,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:55:57,128 INFO L82 PathProgramCache]: Analyzing trace with hash -163561255, now seen corresponding path program 21 times [2021-01-06 17:55:57,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:55:57,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733126452] [2021-01-06 17:55:57,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:55:57,138 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:55:57,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [196705426] [2021-01-06 17:55:57,139 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:55:57,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-01-06 17:55:57,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:55:57,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 45 conjunts are in the unsatisfiable core [2021-01-06 17:55:57,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:55:57,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 0 proven. 1092 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:55:57,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733126452] [2021-01-06 17:55:57,747 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:55:57,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196705426] [2021-01-06 17:55:57,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:55:57,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-01-06 17:55:57,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155568083] [2021-01-06 17:55:57,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 17:55:57,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:55:57,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 17:55:57,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2021-01-06 17:55:57,749 INFO L87 Difference]: Start difference. First operand 117 states and 138 transitions. Second operand 25 states. [2021-01-06 17:55:58,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:55:58,243 INFO L93 Difference]: Finished difference Result 126 states and 148 transitions. [2021-01-06 17:55:58,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-01-06 17:55:58,244 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 116 [2021-01-06 17:55:58,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:55:58,245 INFO L225 Difference]: With dead ends: 126 [2021-01-06 17:55:58,245 INFO L226 Difference]: Without dead ends: 122 [2021-01-06 17:55:58,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=782, Invalid=1288, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 17:55:58,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-01-06 17:55:58,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2021-01-06 17:55:58,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2021-01-06 17:55:58,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 144 transitions. [2021-01-06 17:55:58,255 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 144 transitions. Word has length 116 [2021-01-06 17:55:58,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:55:58,255 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 144 transitions. [2021-01-06 17:55:58,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 17:55:58,255 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 144 transitions. [2021-01-06 17:55:58,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-01-06 17:55:58,256 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:55:58,256 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:55:58,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:55:58,457 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:55:58,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:55:58,458 INFO L82 PathProgramCache]: Analyzing trace with hash 433108203, now seen corresponding path program 22 times [2021-01-06 17:55:58,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:55:58,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40611282] [2021-01-06 17:55:58,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:55:58,466 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:55:58,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1827469604] [2021-01-06 17:55:58,466 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:55:58,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:55:58,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:55:58,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 47 conjunts are in the unsatisfiable core [2021-01-06 17:55:58,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:55:59,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:55:59,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40611282] [2021-01-06 17:55:59,071 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:55:59,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827469604] [2021-01-06 17:55:59,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:55:59,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-01-06 17:55:59,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286983585] [2021-01-06 17:55:59,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 17:55:59,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:55:59,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 17:55:59,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-01-06 17:55:59,073 INFO L87 Difference]: Start difference. First operand 122 states and 144 transitions. Second operand 26 states. [2021-01-06 17:55:59,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:55:59,544 INFO L93 Difference]: Finished difference Result 131 states and 154 transitions. [2021-01-06 17:55:59,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-01-06 17:55:59,545 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 121 [2021-01-06 17:55:59,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:55:59,546 INFO L225 Difference]: With dead ends: 131 [2021-01-06 17:55:59,546 INFO L226 Difference]: Without dead ends: 127 [2021-01-06 17:55:59,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=852, Invalid=1404, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 17:55:59,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-01-06 17:55:59,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-01-06 17:55:59,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2021-01-06 17:55:59,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 150 transitions. [2021-01-06 17:55:59,557 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 150 transitions. Word has length 121 [2021-01-06 17:55:59,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:55:59,558 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 150 transitions. [2021-01-06 17:55:59,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 17:55:59,558 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 150 transitions. [2021-01-06 17:55:59,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-01-06 17:55:59,559 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:55:59,559 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:55:59,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-06 17:55:59,774 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:55:59,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:55:59,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1054868455, now seen corresponding path program 23 times [2021-01-06 17:55:59,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:55:59,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220739241] [2021-01-06 17:55:59,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:55:59,784 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:55:59,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [677447866] [2021-01-06 17:55:59,785 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:55:59,935 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-01-06 17:55:59,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:55:59,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 49 conjunts are in the unsatisfiable core [2021-01-06 17:55:59,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:56:00,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 0 proven. 1311 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:56:00,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220739241] [2021-01-06 17:56:00,493 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:56:00,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677447866] [2021-01-06 17:56:00,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:56:00,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-01-06 17:56:00,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059281956] [2021-01-06 17:56:00,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 17:56:00,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:56:00,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 17:56:00,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2021-01-06 17:56:00,496 INFO L87 Difference]: Start difference. First operand 127 states and 150 transitions. Second operand 27 states. [2021-01-06 17:56:01,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:56:01,043 INFO L93 Difference]: Finished difference Result 136 states and 160 transitions. [2021-01-06 17:56:01,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-01-06 17:56:01,044 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 126 [2021-01-06 17:56:01,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:56:01,045 INFO L225 Difference]: With dead ends: 136 [2021-01-06 17:56:01,045 INFO L226 Difference]: Without dead ends: 132 [2021-01-06 17:56:01,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=925, Invalid=1525, Unknown=0, NotChecked=0, Total=2450 [2021-01-06 17:56:01,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-01-06 17:56:01,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2021-01-06 17:56:01,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2021-01-06 17:56:01,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 156 transitions. [2021-01-06 17:56:01,062 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 156 transitions. Word has length 126 [2021-01-06 17:56:01,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:56:01,063 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 156 transitions. [2021-01-06 17:56:01,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 17:56:01,063 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 156 transitions. [2021-01-06 17:56:01,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-01-06 17:56:01,064 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:56:01,065 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:56:01,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 17:56:01,278 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:56:01,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:56:01,278 INFO L82 PathProgramCache]: Analyzing trace with hash -909901397, now seen corresponding path program 24 times [2021-01-06 17:56:01,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:56:01,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983429740] [2021-01-06 17:56:01,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:56:01,288 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:56:01,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [226509054] [2021-01-06 17:56:01,289 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:56:01,482 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-01-06 17:56:01,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:56:01,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 51 conjunts are in the unsatisfiable core [2021-01-06 17:56:01,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:56:02,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 0 proven. 1428 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:56:02,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983429740] [2021-01-06 17:56:02,087 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:56:02,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226509054] [2021-01-06 17:56:02,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:56:02,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-01-06 17:56:02,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833665295] [2021-01-06 17:56:02,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 17:56:02,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:56:02,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 17:56:02,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2021-01-06 17:56:02,089 INFO L87 Difference]: Start difference. First operand 132 states and 156 transitions. Second operand 28 states. [2021-01-06 17:56:02,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:56:02,711 INFO L93 Difference]: Finished difference Result 141 states and 166 transitions. [2021-01-06 17:56:02,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-01-06 17:56:02,712 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 131 [2021-01-06 17:56:02,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:56:02,713 INFO L225 Difference]: With dead ends: 141 [2021-01-06 17:56:02,713 INFO L226 Difference]: Without dead ends: 137 [2021-01-06 17:56:02,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1001, Invalid=1651, Unknown=0, NotChecked=0, Total=2652 [2021-01-06 17:56:02,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-01-06 17:56:02,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-01-06 17:56:02,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2021-01-06 17:56:02,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 162 transitions. [2021-01-06 17:56:02,722 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 162 transitions. Word has length 131 [2021-01-06 17:56:02,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:56:02,722 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 162 transitions. [2021-01-06 17:56:02,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 17:56:02,723 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 162 transitions. [2021-01-06 17:56:02,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-01-06 17:56:02,724 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:56:02,724 INFO L422 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:56:02,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 17:56:02,940 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:56:02,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:56:02,940 INFO L82 PathProgramCache]: Analyzing trace with hash 150906713, now seen corresponding path program 25 times [2021-01-06 17:56:02,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:56:02,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195956270] [2021-01-06 17:56:02,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:56:02,949 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:56:02,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [668740395] [2021-01-06 17:56:02,949 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:56:03,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:56:03,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 53 conjunts are in the unsatisfiable core [2021-01-06 17:56:03,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:56:03,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1550 backedges. 0 proven. 1550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:56:03,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195956270] [2021-01-06 17:56:03,739 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:56:03,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668740395] [2021-01-06 17:56:03,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:56:03,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2021-01-06 17:56:03,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494904786] [2021-01-06 17:56:03,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 17:56:03,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:56:03,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 17:56:03,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2021-01-06 17:56:03,741 INFO L87 Difference]: Start difference. First operand 137 states and 162 transitions. Second operand 29 states. [2021-01-06 17:56:04,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:56:04,379 INFO L93 Difference]: Finished difference Result 146 states and 172 transitions. [2021-01-06 17:56:04,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-01-06 17:56:04,380 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 136 [2021-01-06 17:56:04,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:56:04,383 INFO L225 Difference]: With dead ends: 146 [2021-01-06 17:56:04,383 INFO L226 Difference]: Without dead ends: 142 [2021-01-06 17:56:04,385 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1080, Invalid=1782, Unknown=0, NotChecked=0, Total=2862 [2021-01-06 17:56:04,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-01-06 17:56:04,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-01-06 17:56:04,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2021-01-06 17:56:04,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 168 transitions. [2021-01-06 17:56:04,393 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 168 transitions. Word has length 136 [2021-01-06 17:56:04,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:56:04,393 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 168 transitions. [2021-01-06 17:56:04,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 17:56:04,393 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 168 transitions. [2021-01-06 17:56:04,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-01-06 17:56:04,395 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:56:04,395 INFO L422 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:56:04,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 17:56:04,609 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:56:04,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:56:04,609 INFO L82 PathProgramCache]: Analyzing trace with hash -158441877, now seen corresponding path program 26 times [2021-01-06 17:56:04,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:56:04,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081563869] [2021-01-06 17:56:04,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:56:04,618 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:56:04,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1875803810] [2021-01-06 17:56:04,619 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:56:04,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:56:04,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:56:04,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 55 conjunts are in the unsatisfiable core [2021-01-06 17:56:04,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:56:05,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1677 backedges. 0 proven. 1677 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:56:05,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081563869] [2021-01-06 17:56:05,425 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:56:05,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875803810] [2021-01-06 17:56:05,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:56:05,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2021-01-06 17:56:05,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592710955] [2021-01-06 17:56:05,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-01-06 17:56:05,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:56:05,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-01-06 17:56:05,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2021-01-06 17:56:05,427 INFO L87 Difference]: Start difference. First operand 142 states and 168 transitions. Second operand 30 states. [2021-01-06 17:56:06,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:56:06,131 INFO L93 Difference]: Finished difference Result 151 states and 178 transitions. [2021-01-06 17:56:06,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-01-06 17:56:06,132 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 141 [2021-01-06 17:56:06,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:56:06,133 INFO L225 Difference]: With dead ends: 151 [2021-01-06 17:56:06,134 INFO L226 Difference]: Without dead ends: 147 [2021-01-06 17:56:06,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1162, Invalid=1918, Unknown=0, NotChecked=0, Total=3080 [2021-01-06 17:56:06,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-01-06 17:56:06,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2021-01-06 17:56:06,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2021-01-06 17:56:06,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 174 transitions. [2021-01-06 17:56:06,145 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 174 transitions. Word has length 141 [2021-01-06 17:56:06,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:56:06,145 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 174 transitions. [2021-01-06 17:56:06,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2021-01-06 17:56:06,146 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 174 transitions. [2021-01-06 17:56:06,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-01-06 17:56:06,146 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:56:06,147 INFO L422 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:56:06,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:56:06,356 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:56:06,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:56:06,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1880079719, now seen corresponding path program 27 times [2021-01-06 17:56:06,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:56:06,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35980208] [2021-01-06 17:56:06,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:56:06,365 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:56:06,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1756174398] [2021-01-06 17:56:06,365 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:56:06,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-01-06 17:56:06,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:56:06,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 57 conjunts are in the unsatisfiable core [2021-01-06 17:56:06,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:56:07,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1809 backedges. 0 proven. 1809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:56:07,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35980208] [2021-01-06 17:56:07,323 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:56:07,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756174398] [2021-01-06 17:56:07,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:56:07,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2021-01-06 17:56:07,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752948329] [2021-01-06 17:56:07,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 17:56:07,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:56:07,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 17:56:07,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2021-01-06 17:56:07,325 INFO L87 Difference]: Start difference. First operand 147 states and 174 transitions. Second operand 31 states. [2021-01-06 17:56:08,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:56:08,093 INFO L93 Difference]: Finished difference Result 156 states and 184 transitions. [2021-01-06 17:56:08,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-01-06 17:56:08,094 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 146 [2021-01-06 17:56:08,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:56:08,095 INFO L225 Difference]: With dead ends: 156 [2021-01-06 17:56:08,095 INFO L226 Difference]: Without dead ends: 152 [2021-01-06 17:56:08,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1247, Invalid=2059, Unknown=0, NotChecked=0, Total=3306 [2021-01-06 17:56:08,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-01-06 17:56:08,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2021-01-06 17:56:08,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2021-01-06 17:56:08,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 180 transitions. [2021-01-06 17:56:08,105 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 180 transitions. Word has length 146 [2021-01-06 17:56:08,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:56:08,105 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 180 transitions. [2021-01-06 17:56:08,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-01-06 17:56:08,106 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 180 transitions. [2021-01-06 17:56:08,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-01-06 17:56:08,106 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:56:08,107 INFO L422 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:56:08,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:56:08,312 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:56:08,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:56:08,313 INFO L82 PathProgramCache]: Analyzing trace with hash 177982251, now seen corresponding path program 28 times [2021-01-06 17:56:08,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:56:08,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594653804] [2021-01-06 17:56:08,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:56:08,323 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:56:08,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [226488235] [2021-01-06 17:56:08,323 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:56:08,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:56:08,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:56:08,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 59 conjunts are in the unsatisfiable core [2021-01-06 17:56:08,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:56:09,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1946 backedges. 0 proven. 1946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:56:09,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594653804] [2021-01-06 17:56:09,174 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:56:09,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226488235] [2021-01-06 17:56:09,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:56:09,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2021-01-06 17:56:09,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885061233] [2021-01-06 17:56:09,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 17:56:09,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:56:09,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 17:56:09,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2021-01-06 17:56:09,176 INFO L87 Difference]: Start difference. First operand 152 states and 180 transitions. Second operand 32 states. [2021-01-06 17:56:09,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:56:09,887 INFO L93 Difference]: Finished difference Result 161 states and 190 transitions. [2021-01-06 17:56:09,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-01-06 17:56:09,887 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 151 [2021-01-06 17:56:09,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:56:09,889 INFO L225 Difference]: With dead ends: 161 [2021-01-06 17:56:09,889 INFO L226 Difference]: Without dead ends: 157 [2021-01-06 17:56:09,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1335, Invalid=2205, Unknown=0, NotChecked=0, Total=3540 [2021-01-06 17:56:09,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-01-06 17:56:09,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2021-01-06 17:56:09,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2021-01-06 17:56:09,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 186 transitions. [2021-01-06 17:56:09,901 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 186 transitions. Word has length 151 [2021-01-06 17:56:09,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:56:09,902 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 186 transitions. [2021-01-06 17:56:09,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 17:56:09,902 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 186 transitions. [2021-01-06 17:56:09,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-01-06 17:56:09,903 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:56:09,903 INFO L422 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:56:10,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:56:10,118 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:56:10,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:56:10,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1895248423, now seen corresponding path program 29 times [2021-01-06 17:56:10,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:56:10,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226206936] [2021-01-06 17:56:10,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:56:10,133 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:56:10,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1124165088] [2021-01-06 17:56:10,133 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:56:10,317 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2021-01-06 17:56:10,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:56:10,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 61 conjunts are in the unsatisfiable core [2021-01-06 17:56:10,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:56:11,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2088 backedges. 0 proven. 2088 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:56:11,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226206936] [2021-01-06 17:56:11,154 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:56:11,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124165088] [2021-01-06 17:56:11,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:56:11,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2021-01-06 17:56:11,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397099541] [2021-01-06 17:56:11,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 17:56:11,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:56:11,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 17:56:11,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 17:56:11,157 INFO L87 Difference]: Start difference. First operand 157 states and 186 transitions. Second operand 33 states. [2021-01-06 17:56:11,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:56:11,973 INFO L93 Difference]: Finished difference Result 166 states and 196 transitions. [2021-01-06 17:56:11,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-01-06 17:56:11,974 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 156 [2021-01-06 17:56:11,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:56:11,975 INFO L225 Difference]: With dead ends: 166 [2021-01-06 17:56:11,975 INFO L226 Difference]: Without dead ends: 162 [2021-01-06 17:56:11,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1426, Invalid=2356, Unknown=0, NotChecked=0, Total=3782 [2021-01-06 17:56:11,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-01-06 17:56:11,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2021-01-06 17:56:11,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2021-01-06 17:56:11,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 192 transitions. [2021-01-06 17:56:11,990 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 192 transitions. Word has length 156 [2021-01-06 17:56:11,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:56:11,991 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 192 transitions. [2021-01-06 17:56:11,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 17:56:11,991 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 192 transitions. [2021-01-06 17:56:11,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-01-06 17:56:11,992 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:56:11,992 INFO L422 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:56:12,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-01-06 17:56:12,206 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:56:12,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:56:12,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1498957803, now seen corresponding path program 30 times [2021-01-06 17:56:12,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:56:12,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586506224] [2021-01-06 17:56:12,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:56:12,215 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:56:12,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [251615253] [2021-01-06 17:56:12,215 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:56:12,450 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-01-06 17:56:12,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:56:12,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 63 conjunts are in the unsatisfiable core [2021-01-06 17:56:12,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:56:13,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2235 backedges. 0 proven. 2235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:56:13,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586506224] [2021-01-06 17:56:13,247 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:56:13,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251615253] [2021-01-06 17:56:13,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:56:13,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2021-01-06 17:56:13,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029986239] [2021-01-06 17:56:13,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-01-06 17:56:13,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:56:13,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-01-06 17:56:13,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 17:56:13,248 INFO L87 Difference]: Start difference. First operand 162 states and 192 transitions. Second operand 34 states. [2021-01-06 17:56:14,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:56:14,164 INFO L93 Difference]: Finished difference Result 171 states and 202 transitions. [2021-01-06 17:56:14,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-01-06 17:56:14,164 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 161 [2021-01-06 17:56:14,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:56:14,166 INFO L225 Difference]: With dead ends: 171 [2021-01-06 17:56:14,166 INFO L226 Difference]: Without dead ends: 167 [2021-01-06 17:56:14,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1520, Invalid=2512, Unknown=0, NotChecked=0, Total=4032 [2021-01-06 17:56:14,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-01-06 17:56:14,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2021-01-06 17:56:14,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2021-01-06 17:56:14,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 198 transitions. [2021-01-06 17:56:14,180 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 198 transitions. Word has length 161 [2021-01-06 17:56:14,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:56:14,180 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 198 transitions. [2021-01-06 17:56:14,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2021-01-06 17:56:14,181 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 198 transitions. [2021-01-06 17:56:14,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-01-06 17:56:14,182 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:56:14,182 INFO L422 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:56:14,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:56:14,397 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:56:14,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:56:14,397 INFO L82 PathProgramCache]: Analyzing trace with hash -161724135, now seen corresponding path program 31 times [2021-01-06 17:56:14,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:56:14,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625929011] [2021-01-06 17:56:14,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:56:14,409 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:56:14,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [51202054] [2021-01-06 17:56:14,409 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:56:14,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:56:14,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 65 conjunts are in the unsatisfiable core [2021-01-06 17:56:14,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:56:15,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2387 backedges. 0 proven. 2387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:56:15,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625929011] [2021-01-06 17:56:15,443 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:56:15,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51202054] [2021-01-06 17:56:15,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:56:15,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2021-01-06 17:56:15,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578390271] [2021-01-06 17:56:15,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-01-06 17:56:15,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:56:15,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-01-06 17:56:15,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 17:56:15,445 INFO L87 Difference]: Start difference. First operand 167 states and 198 transitions. Second operand 35 states. [2021-01-06 17:56:16,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:56:16,436 INFO L93 Difference]: Finished difference Result 176 states and 208 transitions. [2021-01-06 17:56:16,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-01-06 17:56:16,436 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 166 [2021-01-06 17:56:16,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:56:16,438 INFO L225 Difference]: With dead ends: 176 [2021-01-06 17:56:16,438 INFO L226 Difference]: Without dead ends: 172 [2021-01-06 17:56:16,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1617, Invalid=2673, Unknown=0, NotChecked=0, Total=4290 [2021-01-06 17:56:16,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-01-06 17:56:16,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2021-01-06 17:56:16,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2021-01-06 17:56:16,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 204 transitions. [2021-01-06 17:56:16,451 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 204 transitions. Word has length 166 [2021-01-06 17:56:16,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:56:16,451 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 204 transitions. [2021-01-06 17:56:16,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2021-01-06 17:56:16,451 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 204 transitions. [2021-01-06 17:56:16,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-01-06 17:56:16,452 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:56:16,452 INFO L422 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:56:16,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-01-06 17:56:16,665 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:56:16,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:56:16,666 INFO L82 PathProgramCache]: Analyzing trace with hash -550513493, now seen corresponding path program 32 times [2021-01-06 17:56:16,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:56:16,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107657481] [2021-01-06 17:56:16,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:56:16,680 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:56:16,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1386547698] [2021-01-06 17:56:16,680 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:56:16,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:56:16,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:56:16,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 67 conjunts are in the unsatisfiable core [2021-01-06 17:56:16,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:56:17,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2544 backedges. 0 proven. 2544 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:56:17,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107657481] [2021-01-06 17:56:17,700 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:56:17,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386547698] [2021-01-06 17:56:17,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:56:17,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2021-01-06 17:56:17,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229765983] [2021-01-06 17:56:17,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-01-06 17:56:17,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:56:17,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-01-06 17:56:17,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 17:56:17,703 INFO L87 Difference]: Start difference. First operand 172 states and 204 transitions. Second operand 36 states. [2021-01-06 17:56:18,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:56:18,726 INFO L93 Difference]: Finished difference Result 181 states and 214 transitions. [2021-01-06 17:56:18,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-01-06 17:56:18,726 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 171 [2021-01-06 17:56:18,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:56:18,728 INFO L225 Difference]: With dead ends: 181 [2021-01-06 17:56:18,728 INFO L226 Difference]: Without dead ends: 177 [2021-01-06 17:56:18,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1717, Invalid=2839, Unknown=0, NotChecked=0, Total=4556 [2021-01-06 17:56:18,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-01-06 17:56:18,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2021-01-06 17:56:18,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2021-01-06 17:56:18,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 210 transitions. [2021-01-06 17:56:18,740 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 210 transitions. Word has length 171 [2021-01-06 17:56:18,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:56:18,740 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 210 transitions. [2021-01-06 17:56:18,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-01-06 17:56:18,741 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 210 transitions. [2021-01-06 17:56:18,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-01-06 17:56:18,742 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:56:18,742 INFO L422 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:56:18,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:56:18,957 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:56:18,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:56:18,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1392593831, now seen corresponding path program 33 times [2021-01-06 17:56:18,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:56:18,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604855488] [2021-01-06 17:56:18,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:56:18,966 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:56:18,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1318570419] [2021-01-06 17:56:18,967 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:56:19,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2021-01-06 17:56:19,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:56:19,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 69 conjunts are in the unsatisfiable core [2021-01-06 17:56:19,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:56:20,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2706 backedges. 0 proven. 2706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:56:20,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604855488] [2021-01-06 17:56:20,243 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:56:20,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318570419] [2021-01-06 17:56:20,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:56:20,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2021-01-06 17:56:20,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051414078] [2021-01-06 17:56:20,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-01-06 17:56:20,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:56:20,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-01-06 17:56:20,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 17:56:20,245 INFO L87 Difference]: Start difference. First operand 177 states and 210 transitions. Second operand 37 states. [2021-01-06 17:56:21,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:56:21,222 INFO L93 Difference]: Finished difference Result 186 states and 220 transitions. [2021-01-06 17:56:21,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-01-06 17:56:21,223 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 176 [2021-01-06 17:56:21,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:56:21,224 INFO L225 Difference]: With dead ends: 186 [2021-01-06 17:56:21,224 INFO L226 Difference]: Without dead ends: 182 [2021-01-06 17:56:21,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1820, Invalid=3010, Unknown=0, NotChecked=0, Total=4830 [2021-01-06 17:56:21,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-01-06 17:56:21,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2021-01-06 17:56:21,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2021-01-06 17:56:21,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 216 transitions. [2021-01-06 17:56:21,237 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 216 transitions. Word has length 176 [2021-01-06 17:56:21,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:56:21,237 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 216 transitions. [2021-01-06 17:56:21,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2021-01-06 17:56:21,238 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 216 transitions. [2021-01-06 17:56:21,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-01-06 17:56:21,239 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:56:21,239 INFO L422 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:56:21,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-01-06 17:56:21,455 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:56:21,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:56:21,455 INFO L82 PathProgramCache]: Analyzing trace with hash 26112363, now seen corresponding path program 34 times [2021-01-06 17:56:21,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:56:21,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880252311] [2021-01-06 17:56:21,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:56:21,466 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:56:21,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [749457961] [2021-01-06 17:56:21,466 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:56:21,636 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:56:21,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:56:21,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 715 conjuncts, 71 conjunts are in the unsatisfiable core [2021-01-06 17:56:21,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:56:22,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2873 backedges. 0 proven. 2873 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:56:22,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880252311] [2021-01-06 17:56:22,689 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:56:22,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749457961] [2021-01-06 17:56:22,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:56:22,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2021-01-06 17:56:22,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255204054] [2021-01-06 17:56:22,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-01-06 17:56:22,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:56:22,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-01-06 17:56:22,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 17:56:22,691 INFO L87 Difference]: Start difference. First operand 182 states and 216 transitions. Second operand 38 states. [2021-01-06 17:56:23,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:56:23,825 INFO L93 Difference]: Finished difference Result 191 states and 226 transitions. [2021-01-06 17:56:23,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-01-06 17:56:23,826 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 181 [2021-01-06 17:56:23,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:56:23,828 INFO L225 Difference]: With dead ends: 191 [2021-01-06 17:56:23,829 INFO L226 Difference]: Without dead ends: 187 [2021-01-06 17:56:23,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1926, Invalid=3186, Unknown=0, NotChecked=0, Total=5112 [2021-01-06 17:56:23,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-01-06 17:56:23,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2021-01-06 17:56:23,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2021-01-06 17:56:23,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 222 transitions. [2021-01-06 17:56:23,843 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 222 transitions. Word has length 181 [2021-01-06 17:56:23,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:56:23,843 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 222 transitions. [2021-01-06 17:56:23,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2021-01-06 17:56:23,843 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 222 transitions. [2021-01-06 17:56:23,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-01-06 17:56:23,844 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:56:23,845 INFO L422 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:56:24,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-06 17:56:24,060 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:56:24,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:56:24,060 INFO L82 PathProgramCache]: Analyzing trace with hash -788263015, now seen corresponding path program 35 times [2021-01-06 17:56:24,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:56:24,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874618541] [2021-01-06 17:56:24,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:56:24,070 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:56:24,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1677258364] [2021-01-06 17:56:24,070 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:56:24,287 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2021-01-06 17:56:24,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:56:24,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 734 conjuncts, 73 conjunts are in the unsatisfiable core [2021-01-06 17:56:24,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:56:25,448 INFO L134 CoverageAnalysis]: Checked inductivity of 3045 backedges. 0 proven. 3045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:56:25,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874618541] [2021-01-06 17:56:25,449 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:56:25,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677258364] [2021-01-06 17:56:25,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:56:25,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2021-01-06 17:56:25,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094957977] [2021-01-06 17:56:25,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-01-06 17:56:25,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:56:25,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-01-06 17:56:25,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 17:56:25,450 INFO L87 Difference]: Start difference. First operand 187 states and 222 transitions. Second operand 39 states. [2021-01-06 17:56:26,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:56:26,581 INFO L93 Difference]: Finished difference Result 196 states and 232 transitions. [2021-01-06 17:56:26,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-01-06 17:56:26,582 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 186 [2021-01-06 17:56:26,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:56:26,583 INFO L225 Difference]: With dead ends: 196 [2021-01-06 17:56:26,583 INFO L226 Difference]: Without dead ends: 192 [2021-01-06 17:56:26,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2035, Invalid=3367, Unknown=0, NotChecked=0, Total=5402 [2021-01-06 17:56:26,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-01-06 17:56:26,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2021-01-06 17:56:26,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2021-01-06 17:56:26,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 228 transitions. [2021-01-06 17:56:26,595 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 228 transitions. Word has length 186 [2021-01-06 17:56:26,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:56:26,595 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 228 transitions. [2021-01-06 17:56:26,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2021-01-06 17:56:26,595 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 228 transitions. [2021-01-06 17:56:26,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-01-06 17:56:26,597 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:56:26,597 INFO L422 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:56:26,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-06 17:56:26,812 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:56:26,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:56:26,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1323310635, now seen corresponding path program 36 times [2021-01-06 17:56:26,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:56:26,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913742696] [2021-01-06 17:56:26,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:56:26,821 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:56:26,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [126756238] [2021-01-06 17:56:26,821 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:56:27,112 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2021-01-06 17:56:27,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:56:27,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 75 conjunts are in the unsatisfiable core [2021-01-06 17:56:27,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:56:28,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3222 backedges. 0 proven. 3222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:56:28,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913742696] [2021-01-06 17:56:28,337 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:56:28,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126756238] [2021-01-06 17:56:28,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:56:28,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2021-01-06 17:56:28,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840923310] [2021-01-06 17:56:28,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-01-06 17:56:28,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:56:28,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-01-06 17:56:28,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 17:56:28,339 INFO L87 Difference]: Start difference. First operand 192 states and 228 transitions. Second operand 40 states. [2021-01-06 17:56:29,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:56:29,498 INFO L93 Difference]: Finished difference Result 201 states and 238 transitions. [2021-01-06 17:56:29,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-01-06 17:56:29,498 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 191 [2021-01-06 17:56:29,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:56:29,500 INFO L225 Difference]: With dead ends: 201 [2021-01-06 17:56:29,500 INFO L226 Difference]: Without dead ends: 197 [2021-01-06 17:56:29,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2147, Invalid=3553, Unknown=0, NotChecked=0, Total=5700 [2021-01-06 17:56:29,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-01-06 17:56:29,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2021-01-06 17:56:29,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2021-01-06 17:56:29,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 234 transitions. [2021-01-06 17:56:29,513 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 234 transitions. Word has length 191 [2021-01-06 17:56:29,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:56:29,513 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 234 transitions. [2021-01-06 17:56:29,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2021-01-06 17:56:29,513 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 234 transitions. [2021-01-06 17:56:29,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-01-06 17:56:29,514 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:56:29,515 INFO L422 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:56:29,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-06 17:56:29,719 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:56:29,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:56:29,720 INFO L82 PathProgramCache]: Analyzing trace with hash -142583079, now seen corresponding path program 37 times [2021-01-06 17:56:29,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:56:29,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782747720] [2021-01-06 17:56:29,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:56:29,730 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:56:29,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1463549299] [2021-01-06 17:56:29,731 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:56:29,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:56:29,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 772 conjuncts, 77 conjunts are in the unsatisfiable core [2021-01-06 17:56:29,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:56:31,171 INFO L134 CoverageAnalysis]: Checked inductivity of 3404 backedges. 0 proven. 3404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:56:31,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782747720] [2021-01-06 17:56:31,172 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:56:31,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463549299] [2021-01-06 17:56:31,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:56:31,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2021-01-06 17:56:31,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887857684] [2021-01-06 17:56:31,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-01-06 17:56:31,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:56:31,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-01-06 17:56:31,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 17:56:31,174 INFO L87 Difference]: Start difference. First operand 197 states and 234 transitions. Second operand 41 states. [2021-01-06 17:56:32,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:56:32,519 INFO L93 Difference]: Finished difference Result 206 states and 244 transitions. [2021-01-06 17:56:32,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-01-06 17:56:32,520 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 196 [2021-01-06 17:56:32,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:56:32,521 INFO L225 Difference]: With dead ends: 206 [2021-01-06 17:56:32,521 INFO L226 Difference]: Without dead ends: 202 [2021-01-06 17:56:32,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2262, Invalid=3744, Unknown=0, NotChecked=0, Total=6006 [2021-01-06 17:56:32,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-01-06 17:56:32,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2021-01-06 17:56:32,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2021-01-06 17:56:32,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 240 transitions. [2021-01-06 17:56:32,534 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 240 transitions. Word has length 196 [2021-01-06 17:56:32,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:56:32,535 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 240 transitions. [2021-01-06 17:56:32,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2021-01-06 17:56:32,535 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 240 transitions. [2021-01-06 17:56:32,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-01-06 17:56:32,536 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:56:32,536 INFO L422 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:56:32,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:56:32,750 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:56:32,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:56:32,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1049680619, now seen corresponding path program 38 times [2021-01-06 17:56:32,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:56:32,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437751616] [2021-01-06 17:56:32,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:56:32,759 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:56:32,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [270307171] [2021-01-06 17:56:32,760 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:56:32,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:56:32,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:56:32,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 791 conjuncts, 79 conjunts are in the unsatisfiable core [2021-01-06 17:56:32,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:56:34,302 INFO L134 CoverageAnalysis]: Checked inductivity of 3591 backedges. 0 proven. 3591 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:56:34,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437751616] [2021-01-06 17:56:34,302 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:56:34,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270307171] [2021-01-06 17:56:34,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:56:34,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2021-01-06 17:56:34,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609997812] [2021-01-06 17:56:34,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-01-06 17:56:34,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:56:34,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-01-06 17:56:34,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 17:56:34,304 INFO L87 Difference]: Start difference. First operand 202 states and 240 transitions. Second operand 42 states. [2021-01-06 17:56:35,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:56:35,710 INFO L93 Difference]: Finished difference Result 211 states and 250 transitions. [2021-01-06 17:56:35,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-01-06 17:56:35,710 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 201 [2021-01-06 17:56:35,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:56:35,712 INFO L225 Difference]: With dead ends: 211 [2021-01-06 17:56:35,712 INFO L226 Difference]: Without dead ends: 207 [2021-01-06 17:56:35,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2380, Invalid=3940, Unknown=0, NotChecked=0, Total=6320 [2021-01-06 17:56:35,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-01-06 17:56:35,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2021-01-06 17:56:35,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2021-01-06 17:56:35,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 246 transitions. [2021-01-06 17:56:35,725 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 246 transitions. Word has length 201 [2021-01-06 17:56:35,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:56:35,725 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 246 transitions. [2021-01-06 17:56:35,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2021-01-06 17:56:35,726 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 246 transitions. [2021-01-06 17:56:35,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-01-06 17:56:35,727 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:56:35,727 INFO L422 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:56:35,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-01-06 17:56:35,942 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:56:35,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:56:35,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1820825113, now seen corresponding path program 39 times [2021-01-06 17:56:35,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:56:35,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85257907] [2021-01-06 17:56:35,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:56:35,952 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:56:35,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [961216915] [2021-01-06 17:56:35,953 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:56:36,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2021-01-06 17:56:36,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:56:36,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 81 conjunts are in the unsatisfiable core [2021-01-06 17:56:36,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:56:37,662 INFO L134 CoverageAnalysis]: Checked inductivity of 3783 backedges. 0 proven. 3783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:56:37,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85257907] [2021-01-06 17:56:37,663 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:56:37,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961216915] [2021-01-06 17:56:37,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:56:37,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2021-01-06 17:56:37,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163868957] [2021-01-06 17:56:37,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-01-06 17:56:37,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:56:37,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-01-06 17:56:37,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 17:56:37,665 INFO L87 Difference]: Start difference. First operand 207 states and 246 transitions. Second operand 43 states. [2021-01-06 17:56:39,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:56:39,143 INFO L93 Difference]: Finished difference Result 216 states and 256 transitions. [2021-01-06 17:56:39,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-01-06 17:56:39,143 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 206 [2021-01-06 17:56:39,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:56:39,145 INFO L225 Difference]: With dead ends: 216 [2021-01-06 17:56:39,145 INFO L226 Difference]: Without dead ends: 212 [2021-01-06 17:56:39,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2501, Invalid=4141, Unknown=0, NotChecked=0, Total=6642 [2021-01-06 17:56:39,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-01-06 17:56:39,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2021-01-06 17:56:39,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2021-01-06 17:56:39,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 252 transitions. [2021-01-06 17:56:39,160 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 252 transitions. Word has length 206 [2021-01-06 17:56:39,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:56:39,161 INFO L481 AbstractCegarLoop]: Abstraction has 212 states and 252 transitions. [2021-01-06 17:56:39,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2021-01-06 17:56:39,161 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 252 transitions. [2021-01-06 17:56:39,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-01-06 17:56:39,162 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:56:39,162 INFO L422 BasicCegarLoop]: trace histogram [41, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:56:39,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:56:39,377 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:56:39,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:56:39,377 INFO L82 PathProgramCache]: Analyzing trace with hash -250828885, now seen corresponding path program 40 times [2021-01-06 17:56:39,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:56:39,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77803385] [2021-01-06 17:56:39,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:56:39,386 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:56:39,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1918305828] [2021-01-06 17:56:39,387 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:56:39,593 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:56:39,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:56:39,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 83 conjunts are in the unsatisfiable core [2021-01-06 17:56:39,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:56:41,043 INFO L134 CoverageAnalysis]: Checked inductivity of 3980 backedges. 0 proven. 3980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:56:41,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77803385] [2021-01-06 17:56:41,043 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:56:41,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918305828] [2021-01-06 17:56:41,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:56:41,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2021-01-06 17:56:41,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667048908] [2021-01-06 17:56:41,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-01-06 17:56:41,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:56:41,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-01-06 17:56:41,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 17:56:41,045 INFO L87 Difference]: Start difference. First operand 212 states and 252 transitions. Second operand 44 states. [2021-01-06 17:56:42,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:56:42,614 INFO L93 Difference]: Finished difference Result 221 states and 262 transitions. [2021-01-06 17:56:42,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-01-06 17:56:42,615 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 211 [2021-01-06 17:56:42,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:56:42,616 INFO L225 Difference]: With dead ends: 221 [2021-01-06 17:56:42,616 INFO L226 Difference]: Without dead ends: 217 [2021-01-06 17:56:42,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2625, Invalid=4347, Unknown=0, NotChecked=0, Total=6972 [2021-01-06 17:56:42,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-01-06 17:56:42,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2021-01-06 17:56:42,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2021-01-06 17:56:42,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 258 transitions. [2021-01-06 17:56:42,629 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 258 transitions. Word has length 211 [2021-01-06 17:56:42,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:56:42,630 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 258 transitions. [2021-01-06 17:56:42,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2021-01-06 17:56:42,630 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 258 transitions. [2021-01-06 17:56:42,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-01-06 17:56:42,631 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:56:42,631 INFO L422 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:56:42,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:56:42,840 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:56:42,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:56:42,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1932378457, now seen corresponding path program 41 times [2021-01-06 17:56:42,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:56:42,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653665212] [2021-01-06 17:56:42,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:56:42,848 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:56:42,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1219240490] [2021-01-06 17:56:42,849 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:56:43,111 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2021-01-06 17:56:43,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:56:43,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 85 conjunts are in the unsatisfiable core [2021-01-06 17:56:43,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:56:44,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4182 backedges. 0 proven. 4182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:56:44,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653665212] [2021-01-06 17:56:44,598 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:56:44,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219240490] [2021-01-06 17:56:44,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:56:44,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2021-01-06 17:56:44,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294952437] [2021-01-06 17:56:44,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-01-06 17:56:44,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:56:44,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-01-06 17:56:44,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 17:56:44,600 INFO L87 Difference]: Start difference. First operand 217 states and 258 transitions. Second operand 45 states. [2021-01-06 17:56:46,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:56:46,235 INFO L93 Difference]: Finished difference Result 226 states and 268 transitions. [2021-01-06 17:56:46,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-01-06 17:56:46,236 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 216 [2021-01-06 17:56:46,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:56:46,238 INFO L225 Difference]: With dead ends: 226 [2021-01-06 17:56:46,238 INFO L226 Difference]: Without dead ends: 222 [2021-01-06 17:56:46,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2752, Invalid=4558, Unknown=0, NotChecked=0, Total=7310 [2021-01-06 17:56:46,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-01-06 17:56:46,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2021-01-06 17:56:46,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2021-01-06 17:56:46,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 264 transitions. [2021-01-06 17:56:46,252 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 264 transitions. Word has length 216 [2021-01-06 17:56:46,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:56:46,252 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 264 transitions. [2021-01-06 17:56:46,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2021-01-06 17:56:46,252 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 264 transitions. [2021-01-06 17:56:46,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-01-06 17:56:46,254 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:56:46,254 INFO L422 BasicCegarLoop]: trace histogram [43, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:56:46,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-01-06 17:56:46,468 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:56:46,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:56:46,468 INFO L82 PathProgramCache]: Analyzing trace with hash -272661397, now seen corresponding path program 42 times [2021-01-06 17:56:46,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:56:46,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68399857] [2021-01-06 17:56:46,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:56:46,479 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:56:46,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1389364576] [2021-01-06 17:56:46,480 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:56:46,854 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2021-01-06 17:56:46,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:56:46,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 867 conjuncts, 87 conjunts are in the unsatisfiable core [2021-01-06 17:56:46,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:56:48,461 INFO L134 CoverageAnalysis]: Checked inductivity of 4389 backedges. 0 proven. 4389 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:56:48,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68399857] [2021-01-06 17:56:48,461 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:56:48,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389364576] [2021-01-06 17:56:48,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:56:48,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2021-01-06 17:56:48,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731318885] [2021-01-06 17:56:48,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-01-06 17:56:48,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:56:48,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-01-06 17:56:48,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 17:56:48,463 INFO L87 Difference]: Start difference. First operand 222 states and 264 transitions. Second operand 46 states. [2021-01-06 17:56:50,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:56:50,144 INFO L93 Difference]: Finished difference Result 231 states and 274 transitions. [2021-01-06 17:56:50,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-01-06 17:56:50,158 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 221 [2021-01-06 17:56:50,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:56:50,159 INFO L225 Difference]: With dead ends: 231 [2021-01-06 17:56:50,159 INFO L226 Difference]: Without dead ends: 227 [2021-01-06 17:56:50,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2882, Invalid=4774, Unknown=0, NotChecked=0, Total=7656 [2021-01-06 17:56:50,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-01-06 17:56:50,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2021-01-06 17:56:50,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2021-01-06 17:56:50,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 270 transitions. [2021-01-06 17:56:50,173 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 270 transitions. Word has length 221 [2021-01-06 17:56:50,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:56:50,174 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 270 transitions. [2021-01-06 17:56:50,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2021-01-06 17:56:50,174 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 270 transitions. [2021-01-06 17:56:50,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-01-06 17:56:50,175 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:56:50,175 INFO L422 BasicCegarLoop]: trace histogram [44, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:56:50,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-01-06 17:56:50,390 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:56:50,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:56:50,391 INFO L82 PathProgramCache]: Analyzing trace with hash -2054759271, now seen corresponding path program 43 times [2021-01-06 17:56:50,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:56:50,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378149574] [2021-01-06 17:56:50,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:56:50,399 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:56:50,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [992668343] [2021-01-06 17:56:50,399 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:56:50,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:56:50,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 886 conjuncts, 89 conjunts are in the unsatisfiable core [2021-01-06 17:56:50,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:56:52,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4601 backedges. 0 proven. 4601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:56:52,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378149574] [2021-01-06 17:56:52,255 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:56:52,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992668343] [2021-01-06 17:56:52,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:56:52,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2021-01-06 17:56:52,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843547385] [2021-01-06 17:56:52,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-01-06 17:56:52,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:56:52,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-01-06 17:56:52,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 17:56:52,257 INFO L87 Difference]: Start difference. First operand 227 states and 270 transitions. Second operand 47 states. [2021-01-06 17:56:54,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:56:54,050 INFO L93 Difference]: Finished difference Result 236 states and 280 transitions. [2021-01-06 17:56:54,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-01-06 17:56:54,052 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 226 [2021-01-06 17:56:54,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:56:54,053 INFO L225 Difference]: With dead ends: 236 [2021-01-06 17:56:54,053 INFO L226 Difference]: Without dead ends: 232 [2021-01-06 17:56:54,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3015, Invalid=4995, Unknown=0, NotChecked=0, Total=8010 [2021-01-06 17:56:54,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-01-06 17:56:54,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2021-01-06 17:56:54,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2021-01-06 17:56:54,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 276 transitions. [2021-01-06 17:56:54,068 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 276 transitions. Word has length 226 [2021-01-06 17:56:54,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:56:54,068 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 276 transitions. [2021-01-06 17:56:54,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2021-01-06 17:56:54,068 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 276 transitions. [2021-01-06 17:56:54,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2021-01-06 17:56:54,069 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:56:54,070 INFO L422 BasicCegarLoop]: trace histogram [45, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:56:54,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-01-06 17:56:54,285 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:56:54,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:56:54,285 INFO L82 PathProgramCache]: Analyzing trace with hash -317361877, now seen corresponding path program 44 times [2021-01-06 17:56:54,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:56:54,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115134922] [2021-01-06 17:56:54,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:56:54,295 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:56:54,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1918542701] [2021-01-06 17:56:54,296 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:56:54,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:56:54,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:56:54,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 91 conjunts are in the unsatisfiable core [2021-01-06 17:56:54,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:56:56,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4818 backedges. 0 proven. 4818 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:56:56,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115134922] [2021-01-06 17:56:56,195 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:56:56,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918542701] [2021-01-06 17:56:56,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:56:56,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2021-01-06 17:56:56,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940271913] [2021-01-06 17:56:56,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-01-06 17:56:56,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:56:56,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-01-06 17:56:56,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 17:56:56,198 INFO L87 Difference]: Start difference. First operand 232 states and 276 transitions. Second operand 48 states. [2021-01-06 17:56:58,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:56:58,070 INFO L93 Difference]: Finished difference Result 241 states and 286 transitions. [2021-01-06 17:56:58,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-01-06 17:56:58,070 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 231 [2021-01-06 17:56:58,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:56:58,071 INFO L225 Difference]: With dead ends: 241 [2021-01-06 17:56:58,072 INFO L226 Difference]: Without dead ends: 237 [2021-01-06 17:56:58,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3151, Invalid=5221, Unknown=0, NotChecked=0, Total=8372 [2021-01-06 17:56:58,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-01-06 17:56:58,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2021-01-06 17:56:58,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2021-01-06 17:56:58,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 282 transitions. [2021-01-06 17:56:58,098 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 282 transitions. Word has length 231 [2021-01-06 17:56:58,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:56:58,098 INFO L481 AbstractCegarLoop]: Abstraction has 237 states and 282 transitions. [2021-01-06 17:56:58,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2021-01-06 17:56:58,098 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 282 transitions. [2021-01-06 17:56:58,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-01-06 17:56:58,100 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:56:58,100 INFO L422 BasicCegarLoop]: trace histogram [46, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:56:58,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:56:58,315 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:56:58,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:56:58,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1801000999, now seen corresponding path program 45 times [2021-01-06 17:56:58,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:56:58,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293789382] [2021-01-06 17:56:58,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:56:58,329 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:56:58,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1762741349] [2021-01-06 17:56:58,329 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:56:58,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2021-01-06 17:56:58,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:56:58,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 924 conjuncts, 93 conjunts are in the unsatisfiable core [2021-01-06 17:56:58,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:57:00,370 INFO L134 CoverageAnalysis]: Checked inductivity of 5040 backedges. 0 proven. 5040 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:57:00,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293789382] [2021-01-06 17:57:00,370 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:57:00,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762741349] [2021-01-06 17:57:00,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:57:00,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2021-01-06 17:57:00,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595880844] [2021-01-06 17:57:00,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-01-06 17:57:00,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:57:00,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-01-06 17:57:00,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 17:57:00,372 INFO L87 Difference]: Start difference. First operand 237 states and 282 transitions. Second operand 49 states. [2021-01-06 17:57:02,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:57:02,326 INFO L93 Difference]: Finished difference Result 246 states and 292 transitions. [2021-01-06 17:57:02,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-01-06 17:57:02,327 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 236 [2021-01-06 17:57:02,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:57:02,330 INFO L225 Difference]: With dead ends: 246 [2021-01-06 17:57:02,330 INFO L226 Difference]: Without dead ends: 242 [2021-01-06 17:57:02,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3290, Invalid=5452, Unknown=0, NotChecked=0, Total=8742 [2021-01-06 17:57:02,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-01-06 17:57:02,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 242. [2021-01-06 17:57:02,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2021-01-06 17:57:02,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 288 transitions. [2021-01-06 17:57:02,344 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 288 transitions. Word has length 236 [2021-01-06 17:57:02,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:57:02,345 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 288 transitions. [2021-01-06 17:57:02,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2021-01-06 17:57:02,345 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 288 transitions. [2021-01-06 17:57:02,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-01-06 17:57:02,346 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:57:02,346 INFO L422 BasicCegarLoop]: trace histogram [47, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:57:02,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-01-06 17:57:02,562 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:57:02,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:57:02,562 INFO L82 PathProgramCache]: Analyzing trace with hash -2072351253, now seen corresponding path program 46 times [2021-01-06 17:57:02,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:57:02,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481937124] [2021-01-06 17:57:02,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:57:02,571 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:57:02,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [969097587] [2021-01-06 17:57:02,571 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:57:02,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:57:02,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:57:02,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 943 conjuncts, 95 conjunts are in the unsatisfiable core [2021-01-06 17:57:02,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:57:04,625 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 5267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:57:04,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481937124] [2021-01-06 17:57:04,626 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:57:04,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969097587] [2021-01-06 17:57:04,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:57:04,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2021-01-06 17:57:04,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574847083] [2021-01-06 17:57:04,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-01-06 17:57:04,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:57:04,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-01-06 17:57:04,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2021-01-06 17:57:04,628 INFO L87 Difference]: Start difference. First operand 242 states and 288 transitions. Second operand 50 states. [2021-01-06 17:57:06,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:57:06,659 INFO L93 Difference]: Finished difference Result 251 states and 298 transitions. [2021-01-06 17:57:06,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-01-06 17:57:06,659 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 241 [2021-01-06 17:57:06,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:57:06,660 INFO L225 Difference]: With dead ends: 251 [2021-01-06 17:57:06,661 INFO L226 Difference]: Without dead ends: 247 [2021-01-06 17:57:06,662 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3432, Invalid=5688, Unknown=0, NotChecked=0, Total=9120 [2021-01-06 17:57:06,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-01-06 17:57:06,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2021-01-06 17:57:06,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2021-01-06 17:57:06,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 294 transitions. [2021-01-06 17:57:06,676 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 294 transitions. Word has length 241 [2021-01-06 17:57:06,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:57:06,676 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 294 transitions. [2021-01-06 17:57:06,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2021-01-06 17:57:06,676 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 294 transitions. [2021-01-06 17:57:06,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-01-06 17:57:06,678 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:57:06,678 INFO L422 BasicCegarLoop]: trace histogram [48, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:57:06,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-01-06 17:57:06,891 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:57:06,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:57:06,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1218568985, now seen corresponding path program 47 times [2021-01-06 17:57:06,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:57:06,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340611469] [2021-01-06 17:57:06,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:57:06,901 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:57:06,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1886452956] [2021-01-06 17:57:06,901 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:57:07,210 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2021-01-06 17:57:07,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:57:07,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 962 conjuncts, 97 conjunts are in the unsatisfiable core [2021-01-06 17:57:07,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:57:09,208 INFO L134 CoverageAnalysis]: Checked inductivity of 5499 backedges. 0 proven. 5499 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:57:09,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340611469] [2021-01-06 17:57:09,209 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:57:09,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886452956] [2021-01-06 17:57:09,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:57:09,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2021-01-06 17:57:09,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354743470] [2021-01-06 17:57:09,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-01-06 17:57:09,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:57:09,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-01-06 17:57:09,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2021-01-06 17:57:09,211 INFO L87 Difference]: Start difference. First operand 247 states and 294 transitions. Second operand 51 states. [2021-01-06 17:57:11,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:57:11,330 INFO L93 Difference]: Finished difference Result 256 states and 304 transitions. [2021-01-06 17:57:11,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-01-06 17:57:11,331 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 246 [2021-01-06 17:57:11,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:57:11,333 INFO L225 Difference]: With dead ends: 256 [2021-01-06 17:57:11,333 INFO L226 Difference]: Without dead ends: 252 [2021-01-06 17:57:11,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3577, Invalid=5929, Unknown=0, NotChecked=0, Total=9506 [2021-01-06 17:57:11,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-01-06 17:57:11,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2021-01-06 17:57:11,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2021-01-06 17:57:11,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 300 transitions. [2021-01-06 17:57:11,348 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 300 transitions. Word has length 246 [2021-01-06 17:57:11,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:57:11,349 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 300 transitions. [2021-01-06 17:57:11,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2021-01-06 17:57:11,349 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 300 transitions. [2021-01-06 17:57:11,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2021-01-06 17:57:11,350 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:57:11,350 INFO L422 BasicCegarLoop]: trace histogram [49, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:57:11,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:57:11,565 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:57:11,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:57:11,565 INFO L82 PathProgramCache]: Analyzing trace with hash -94733653, now seen corresponding path program 48 times [2021-01-06 17:57:11,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:57:11,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615522915] [2021-01-06 17:57:11,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:57:11,574 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:57:11,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [287712842] [2021-01-06 17:57:11,574 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:57:12,028 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2021-01-06 17:57:12,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:57:12,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 981 conjuncts, 99 conjunts are in the unsatisfiable core [2021-01-06 17:57:12,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:57:14,045 INFO L134 CoverageAnalysis]: Checked inductivity of 5736 backedges. 0 proven. 5736 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:57:14,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615522915] [2021-01-06 17:57:14,045 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:57:14,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287712842] [2021-01-06 17:57:14,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:57:14,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2021-01-06 17:57:14,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526739656] [2021-01-06 17:57:14,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-01-06 17:57:14,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:57:14,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-01-06 17:57:14,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2021-01-06 17:57:14,047 INFO L87 Difference]: Start difference. First operand 252 states and 300 transitions. Second operand 52 states. [2021-01-06 17:57:16,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:57:16,275 INFO L93 Difference]: Finished difference Result 261 states and 310 transitions. [2021-01-06 17:57:16,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-01-06 17:57:16,276 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 251 [2021-01-06 17:57:16,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:57:16,277 INFO L225 Difference]: With dead ends: 261 [2021-01-06 17:57:16,277 INFO L226 Difference]: Without dead ends: 257 [2021-01-06 17:57:16,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3725, Invalid=6175, Unknown=0, NotChecked=0, Total=9900 [2021-01-06 17:57:16,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-01-06 17:57:16,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 257. [2021-01-06 17:57:16,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2021-01-06 17:57:16,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 306 transitions. [2021-01-06 17:57:16,293 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 306 transitions. Word has length 251 [2021-01-06 17:57:16,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:57:16,293 INFO L481 AbstractCegarLoop]: Abstraction has 257 states and 306 transitions. [2021-01-06 17:57:16,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2021-01-06 17:57:16,293 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 306 transitions. [2021-01-06 17:57:16,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2021-01-06 17:57:16,295 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:57:16,295 INFO L422 BasicCegarLoop]: trace histogram [50, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:57:16,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-01-06 17:57:16,511 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:57:16,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:57:16,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1082904153, now seen corresponding path program 49 times [2021-01-06 17:57:16,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:57:16,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539097891] [2021-01-06 17:57:16,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:57:16,521 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:57:16,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1622856205] [2021-01-06 17:57:16,521 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:57:16,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:57:16,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 1000 conjuncts, 101 conjunts are in the unsatisfiable core [2021-01-06 17:57:16,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:57:18,703 INFO L134 CoverageAnalysis]: Checked inductivity of 5978 backedges. 0 proven. 5978 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:57:18,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539097891] [2021-01-06 17:57:18,703 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:57:18,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622856205] [2021-01-06 17:57:18,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:57:18,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2021-01-06 17:57:18,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920702990] [2021-01-06 17:57:18,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-01-06 17:57:18,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:57:18,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-01-06 17:57:18,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2021-01-06 17:57:18,706 INFO L87 Difference]: Start difference. First operand 257 states and 306 transitions. Second operand 53 states. [2021-01-06 17:57:20,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:57:20,971 INFO L93 Difference]: Finished difference Result 266 states and 316 transitions. [2021-01-06 17:57:20,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-01-06 17:57:20,972 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 256 [2021-01-06 17:57:20,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:57:20,974 INFO L225 Difference]: With dead ends: 266 [2021-01-06 17:57:20,974 INFO L226 Difference]: Without dead ends: 262 [2021-01-06 17:57:20,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3876, Invalid=6426, Unknown=0, NotChecked=0, Total=10302 [2021-01-06 17:57:20,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-01-06 17:57:20,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 262. [2021-01-06 17:57:20,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2021-01-06 17:57:20,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 312 transitions. [2021-01-06 17:57:20,987 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 312 transitions. Word has length 256 [2021-01-06 17:57:20,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:57:20,987 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 312 transitions. [2021-01-06 17:57:20,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2021-01-06 17:57:20,988 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 312 transitions. [2021-01-06 17:57:20,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2021-01-06 17:57:20,988 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:57:20,989 INFO L422 BasicCegarLoop]: trace histogram [51, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:57:21,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:57:21,189 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:57:21,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:57:21,190 INFO L82 PathProgramCache]: Analyzing trace with hash -64907413, now seen corresponding path program 50 times [2021-01-06 17:57:21,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:57:21,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683751463] [2021-01-06 17:57:21,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:57:21,199 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:57:21,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1871797693] [2021-01-06 17:57:21,199 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:57:21,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:57:21,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-01-06 17:57:21,438 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 17:57:21,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 17:57:21,555 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 17:57:22,550 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-01-06 17:57:22,550 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 17:57:22,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-01-06 17:57:22,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 05:57:22 BoogieIcfgContainer [2021-01-06 17:57:22,961 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 17:57:22,962 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 17:57:22,962 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 17:57:22,962 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 17:57:22,963 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:55:39" (3/4) ... [2021-01-06 17:57:22,968 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-01-06 17:57:23,150 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/nla-digbench-scaling/mannadiv_unwindbound50.c-witness.graphml [2021-01-06 17:57:23,150 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 17:57:23,153 INFO L168 Benchmark]: Toolchain (without parser) took 104122.74 ms. Allocated memory was 152.0 MB in the beginning and 352.3 MB in the end (delta: 200.3 MB). Free memory was 127.0 MB in the beginning and 178.5 MB in the end (delta: -51.5 MB). Peak memory consumption was 149.7 MB. Max. memory is 8.0 GB. [2021-01-06 17:57:23,153 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 152.0 MB. Free memory was 123.5 MB in the beginning and 123.4 MB in the end (delta: 89.3 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 17:57:23,154 INFO L168 Benchmark]: CACSL2BoogieTranslator took 254.46 ms. Allocated memory is still 152.0 MB. Free memory was 126.7 MB in the beginning and 116.8 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-01-06 17:57:23,154 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.80 ms. Allocated memory is still 152.0 MB. Free memory was 116.7 MB in the beginning and 115.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 17:57:23,155 INFO L168 Benchmark]: Boogie Preprocessor took 23.91 ms. Allocated memory is still 152.0 MB. Free memory was 115.2 MB in the beginning and 114.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 17:57:23,155 INFO L168 Benchmark]: RCFGBuilder took 332.09 ms. Allocated memory is still 152.0 MB. Free memory was 114.1 MB in the beginning and 100.8 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-01-06 17:57:23,156 INFO L168 Benchmark]: TraceAbstraction took 103277.81 ms. Allocated memory was 152.0 MB in the beginning and 352.3 MB in the end (delta: 200.3 MB). Free memory was 100.3 MB in the beginning and 197.9 MB in the end (delta: -97.6 MB). Peak memory consumption was 103.6 MB. Max. memory is 8.0 GB. [2021-01-06 17:57:23,157 INFO L168 Benchmark]: Witness Printer took 188.52 ms. Allocated memory is still 352.3 MB. Free memory was 197.9 MB in the beginning and 178.5 MB in the end (delta: 19.4 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. [2021-01-06 17:57:23,159 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 152.0 MB. Free memory was 123.5 MB in the beginning and 123.4 MB in the end (delta: 89.3 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 254.46 ms. Allocated memory is still 152.0 MB. Free memory was 126.7 MB in the beginning and 116.8 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 37.80 ms. Allocated memory is still 152.0 MB. Free memory was 116.7 MB in the beginning and 115.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 23.91 ms. Allocated memory is still 152.0 MB. Free memory was 115.2 MB in the beginning and 114.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 332.09 ms. Allocated memory is still 152.0 MB. Free memory was 114.1 MB in the beginning and 100.8 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 103277.81 ms. Allocated memory was 152.0 MB in the beginning and 352.3 MB in the end (delta: 200.3 MB). Free memory was 100.3 MB in the beginning and 197.9 MB in the end (delta: -97.6 MB). Peak memory consumption was 103.6 MB. Max. memory is 8.0 GB. * Witness Printer took 188.52 ms. Allocated memory is still 352.3 MB. Free memory was 197.9 MB in the beginning and 178.5 MB in the end (delta: 19.4 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [counter=0] [L24] int x1, x2; [L25] int y1, y2, y3; [L26] x1 = __VERIFIER_nondet_int() [L27] x2 = __VERIFIER_nondet_int() [L13] COND FALSE !(!cond) VAL [counter=0] [L13] COND FALSE !(!cond) VAL [counter=0] [L32] y1 = 0 [L33] y2 = 0 [L34] y3 = x1 VAL [counter=0] [L36] EXPR counter++ VAL [counter=1] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=1] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=1] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=1] [L36] EXPR counter++ VAL [counter=2] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=2] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=2] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=2] [L36] EXPR counter++ VAL [counter=3] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=3] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=3] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=3] [L36] EXPR counter++ VAL [counter=4] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=4] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=4] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=4] [L36] EXPR counter++ VAL [counter=5] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=5] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=5] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=5] [L36] EXPR counter++ VAL [counter=6] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=6] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=6] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=6] [L36] EXPR counter++ VAL [counter=7] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=7] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=7] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=7] [L36] EXPR counter++ VAL [counter=8] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=8] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=8] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=8] [L36] EXPR counter++ VAL [counter=9] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=9] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=9] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=9] [L36] EXPR counter++ VAL [counter=10] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=10] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=10] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=10] [L36] EXPR counter++ VAL [counter=11] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=11] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=11] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=11] [L36] EXPR counter++ VAL [counter=12] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=12] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=12] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=12] [L36] EXPR counter++ VAL [counter=13] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=13] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=13] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=13] [L36] EXPR counter++ VAL [counter=14] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=14] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=14] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=14] [L36] EXPR counter++ VAL [counter=15] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=15] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=15] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=15] [L36] EXPR counter++ VAL [counter=16] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=16] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=16] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=16] [L36] EXPR counter++ VAL [counter=17] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=17] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=17] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=17] [L36] EXPR counter++ VAL [counter=18] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=18] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=18] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=18] [L36] EXPR counter++ VAL [counter=19] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=19] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=19] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=19] [L36] EXPR counter++ VAL [counter=20] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=20] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=20] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=20] [L36] EXPR counter++ VAL [counter=21] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=21] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=21] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=21] [L36] EXPR counter++ VAL [counter=22] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=22] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=22] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=22] [L36] EXPR counter++ VAL [counter=23] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=23] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=23] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=23] [L36] EXPR counter++ VAL [counter=24] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=24] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=24] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=24] [L36] EXPR counter++ VAL [counter=25] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=25] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=25] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=25] [L36] EXPR counter++ VAL [counter=26] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=26] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=26] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=26] [L36] EXPR counter++ VAL [counter=27] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=27] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=27] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=27] [L36] EXPR counter++ VAL [counter=28] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=28] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=28] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=28] [L36] EXPR counter++ VAL [counter=29] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=29] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=29] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=29] [L36] EXPR counter++ VAL [counter=30] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=30] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=30] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=30] [L36] EXPR counter++ VAL [counter=31] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=31] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=31] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=31] [L36] EXPR counter++ VAL [counter=32] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=32] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=32] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=32] [L36] EXPR counter++ VAL [counter=33] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=33] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=33] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=33] [L36] EXPR counter++ VAL [counter=34] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=34] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=34] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=34] [L36] EXPR counter++ VAL [counter=35] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=35] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=35] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=35] [L36] EXPR counter++ VAL [counter=36] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=36] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=36] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=36] [L36] EXPR counter++ VAL [counter=37] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=37] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=37] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=37] [L36] EXPR counter++ VAL [counter=38] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=38] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=38] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=38] [L36] EXPR counter++ VAL [counter=39] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=39] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=39] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=39] [L36] EXPR counter++ VAL [counter=40] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=40] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=40] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=40] [L36] EXPR counter++ VAL [counter=41] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=41] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=41] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=41] [L36] EXPR counter++ VAL [counter=42] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=42] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=42] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=42] [L36] EXPR counter++ VAL [counter=43] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=43] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=43] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=43] [L36] EXPR counter++ VAL [counter=44] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=44] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=44] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=44] [L36] EXPR counter++ VAL [counter=45] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=45] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=45] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=45] [L36] EXPR counter++ VAL [counter=46] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=46] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=46] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=46] [L36] EXPR counter++ VAL [counter=47] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=47] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=47] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=47] [L36] EXPR counter++ VAL [counter=48] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=48] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=48] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=48] [L36] EXPR counter++ VAL [counter=49] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=49] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=49] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=49] [L36] EXPR counter++ VAL [counter=50] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=50] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=50] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=50] [L36] EXPR counter++ VAL [counter=51] [L36] COND FALSE !(counter++<50) [L16] COND TRUE !(cond) VAL [counter=51] [L18] reach_error() VAL [counter=51] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 21 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 102.9s, OverallIterations: 54, TraceHistogramMax: 51, AutomataDifference: 41.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 746 SDtfs, 2985 SDslu, 7146 SDs, 0 SdLazy, 2930 SolverSat, 136 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7881 GetRequests, 5310 SyntacticMatches, 0 SemanticMatches, 2571 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20841 ImplicationChecksByTransitivity, 62.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=262occurred in iteration=53, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 53 MinimizatonAttempts, 11 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.3s SsaConstructionTime, 6.4s SatisfiabilityAnalysisTime, 38.6s InterpolantComputationTime, 6969 NumberOfCodeBlocks, 6969 NumberOfCodeBlocksAsserted, 687 NumberOfCheckSat, 6655 ConstructedInterpolants, 0 QuantifiedInterpolants, 3376695 SizeOfPredicates, 1245 NumberOfNonLiveVariables, 26870 ConjunctsInSsa, 2641 ConjunctsInUnsatCore, 53 InterpolantComputations, 4 PerfectInterpolantSequences, 0/100450 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...