/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/loops-crafted-1/mono-crafted_3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 07:07:36,293 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 07:07:36,296 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 07:07:36,349 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 07:07:36,350 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 07:07:36,355 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 07:07:36,358 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 07:07:36,374 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 07:07:36,378 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 07:07:36,384 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 07:07:36,388 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 07:07:36,390 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 07:07:36,390 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 07:07:36,393 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 07:07:36,394 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 07:07:36,396 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 07:07:36,397 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 07:07:36,400 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 07:07:36,407 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 07:07:36,416 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 07:07:36,419 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 07:07:36,421 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 07:07:36,422 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 07:07:36,424 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 07:07:36,432 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 07:07:36,441 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 07:07:36,442 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 07:07:36,443 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 07:07:36,444 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 07:07:36,470 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 07:07:36,470 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 07:07:36,471 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 07:07:36,472 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 07:07:36,472 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 07:07:36,472 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 07:07:36,472 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 07:07:36,472 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 07:07:36,473 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 07:07:36,473 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 07:07:36,473 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 07:07:36,473 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 07:07:36,473 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 07:07:36,474 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 07:07:36,474 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 07:07:36,474 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 07:07:36,474 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 07:07:36,474 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 07:07:36,475 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 07:07:36,475 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 07:07:36,475 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 07:07:36,475 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 07:07:36,476 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 07:07:36,476 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 07:07:36,476 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 07:07:36,476 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 07:07:36,823 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 07:07:36,853 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 07:07:36,858 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 07:07:36,859 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 07:07:36,860 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 07:07:36,861 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/mono-crafted_3.c [2020-12-23 07:07:36,935 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/bf51aa7c7/72ffa5bc2f244d7083d72e7ca6ec2caa/FLAG7f2419f00 [2020-12-23 07:07:37,619 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 07:07:37,620 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/mono-crafted_3.c [2020-12-23 07:07:37,627 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/bf51aa7c7/72ffa5bc2f244d7083d72e7ca6ec2caa/FLAG7f2419f00 [2020-12-23 07:07:37,980 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/bf51aa7c7/72ffa5bc2f244d7083d72e7ca6ec2caa [2020-12-23 07:07:37,986 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 07:07:37,988 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 07:07:37,994 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 07:07:37,995 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 07:07:38,000 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 07:07:38,002 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:07:37" (1/1) ... [2020-12-23 07:07:38,003 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ab9f558 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:07:38, skipping insertion in model container [2020-12-23 07:07:38,004 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:07:37" (1/1) ... [2020-12-23 07:07:38,014 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 07:07:38,030 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 07:07:38,228 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/loops-crafted-1/mono-crafted_3.c[318,331] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] [2020-12-23 07:07:38,243 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:07:38,253 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 07:07:38,268 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/loops-crafted-1/mono-crafted_3.c[318,331] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] [2020-12-23 07:07:38,272 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:07:38,288 INFO L208 MainTranslator]: Completed translation [2020-12-23 07:07:38,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:07:38 WrapperNode [2020-12-23 07:07:38,289 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 07:07:38,290 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 07:07:38,290 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 07:07:38,291 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 07:07:38,300 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:07:38" (1/1) ... [2020-12-23 07:07:38,307 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:07:38" (1/1) ... [2020-12-23 07:07:38,327 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 07:07:38,328 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 07:07:38,329 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 07:07:38,329 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 07:07:38,338 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:07:38" (1/1) ... [2020-12-23 07:07:38,339 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:07:38" (1/1) ... [2020-12-23 07:07:38,340 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:07:38" (1/1) ... [2020-12-23 07:07:38,341 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:07:38" (1/1) ... [2020-12-23 07:07:38,344 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:07:38" (1/1) ... [2020-12-23 07:07:38,349 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:07:38" (1/1) ... [2020-12-23 07:07:38,350 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:07:38" (1/1) ... [2020-12-23 07:07:38,352 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 07:07:38,353 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 07:07:38,353 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 07:07:38,353 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 07:07:38,354 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:07:38" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 07:07:38,462 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 07:07:38,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 07:07:38,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 07:07:38,463 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 07:07:38,714 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 07:07:38,715 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-23 07:07:38,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:07:38 BoogieIcfgContainer [2020-12-23 07:07:38,717 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 07:07:38,718 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 07:07:38,718 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 07:07:38,722 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 07:07:38,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 07:07:37" (1/3) ... [2020-12-23 07:07:38,723 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2816f403 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:07:38, skipping insertion in model container [2020-12-23 07:07:38,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:07:38" (2/3) ... [2020-12-23 07:07:38,724 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2816f403 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:07:38, skipping insertion in model container [2020-12-23 07:07:38,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:07:38" (3/3) ... [2020-12-23 07:07:38,726 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_3.c [2020-12-23 07:07:38,733 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 07:07:38,738 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 07:07:38,759 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 07:07:38,840 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 07:07:38,840 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 07:07:38,840 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 07:07:38,840 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 07:07:38,841 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 07:07:38,841 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 07:07:38,841 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 07:07:38,841 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 07:07:38,872 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-12-23 07:07:38,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 07:07:38,883 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:38,887 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:38,888 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:38,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:38,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1818421976, now seen corresponding path program 1 times [2020-12-23 07:07:38,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:38,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018610201] [2020-12-23 07:07:38,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:39,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:39,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:07:39,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018610201] [2020-12-23 07:07:39,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:07:39,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 07:07:39,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456076661] [2020-12-23 07:07:39,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 07:07:39,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:39,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 07:07:39,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 07:07:39,155 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2020-12-23 07:07:39,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:39,174 INFO L93 Difference]: Finished difference Result 22 states and 29 transitions. [2020-12-23 07:07:39,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 07:07:39,176 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2020-12-23 07:07:39,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:39,191 INFO L225 Difference]: With dead ends: 22 [2020-12-23 07:07:39,191 INFO L226 Difference]: Without dead ends: 9 [2020-12-23 07:07:39,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 07:07:39,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-12-23 07:07:39,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-12-23 07:07:39,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-12-23 07:07:39,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2020-12-23 07:07:39,231 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 7 [2020-12-23 07:07:39,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:39,231 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2020-12-23 07:07:39,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 07:07:39,232 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2020-12-23 07:07:39,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 07:07:39,232 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:39,232 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:39,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 07:07:39,233 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:39,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:39,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1809186766, now seen corresponding path program 1 times [2020-12-23 07:07:39,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:39,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212859069] [2020-12-23 07:07:39,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:39,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:39,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:07:39,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212859069] [2020-12-23 07:07:39,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:07:39,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 07:07:39,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963271774] [2020-12-23 07:07:39,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 07:07:39,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:39,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 07:07:39,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 07:07:39,302 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand 3 states. [2020-12-23 07:07:39,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:39,331 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2020-12-23 07:07:39,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 07:07:39,332 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-23 07:07:39,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:39,333 INFO L225 Difference]: With dead ends: 18 [2020-12-23 07:07:39,333 INFO L226 Difference]: Without dead ends: 11 [2020-12-23 07:07:39,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 07:07:39,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-12-23 07:07:39,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-12-23 07:07:39,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-23 07:07:39,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2020-12-23 07:07:39,338 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 7 [2020-12-23 07:07:39,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:39,338 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2020-12-23 07:07:39,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 07:07:39,338 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2020-12-23 07:07:39,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 07:07:39,339 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:39,339 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:39,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 07:07:39,339 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:39,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:39,340 INFO L82 PathProgramCache]: Analyzing trace with hash 576672011, now seen corresponding path program 1 times [2020-12-23 07:07:39,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:39,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123726080] [2020-12-23 07:07:39,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:39,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:39,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:07:39,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123726080] [2020-12-23 07:07:39,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:07:39,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 07:07:39,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621038067] [2020-12-23 07:07:39,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 07:07:39,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:39,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 07:07:39,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 07:07:39,379 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 3 states. [2020-12-23 07:07:39,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:39,391 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2020-12-23 07:07:39,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 07:07:39,392 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-12-23 07:07:39,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:39,393 INFO L225 Difference]: With dead ends: 16 [2020-12-23 07:07:39,393 INFO L226 Difference]: Without dead ends: 12 [2020-12-23 07:07:39,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 07:07:39,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-23 07:07:39,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-12-23 07:07:39,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-23 07:07:39,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2020-12-23 07:07:39,397 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2020-12-23 07:07:39,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:39,397 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2020-12-23 07:07:39,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 07:07:39,398 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2020-12-23 07:07:39,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 07:07:39,398 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:39,398 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:39,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 07:07:39,399 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:39,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:39,399 INFO L82 PathProgramCache]: Analyzing trace with hash 698628545, now seen corresponding path program 1 times [2020-12-23 07:07:39,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:39,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56590921] [2020-12-23 07:07:39,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:39,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:39,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:07:39,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56590921] [2020-12-23 07:07:39,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19992331] [2020-12-23 07:07:39,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:39,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:39,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 07:07:39,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:39,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:07:39,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:39,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 07:07:39,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219700675] [2020-12-23 07:07:39,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 07:07:39,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:39,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 07:07:39,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:07:39,596 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 5 states. [2020-12-23 07:07:39,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:39,628 INFO L93 Difference]: Finished difference Result 22 states and 28 transitions. [2020-12-23 07:07:39,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 07:07:39,629 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-23 07:07:39,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:39,630 INFO L225 Difference]: With dead ends: 22 [2020-12-23 07:07:39,630 INFO L226 Difference]: Without dead ends: 14 [2020-12-23 07:07:39,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:07:39,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-23 07:07:39,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-23 07:07:39,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-23 07:07:39,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-12-23 07:07:39,635 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2020-12-23 07:07:39,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:39,635 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-12-23 07:07:39,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 07:07:39,635 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-12-23 07:07:39,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 07:07:39,636 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:39,636 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:39,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:39,850 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:39,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:39,852 INFO L82 PathProgramCache]: Analyzing trace with hash 526975844, now seen corresponding path program 2 times [2020-12-23 07:07:39,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:39,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720903225] [2020-12-23 07:07:39,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:39,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:39,927 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 07:07:39,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720903225] [2020-12-23 07:07:39,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:07:39,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 07:07:39,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413376411] [2020-12-23 07:07:39,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 07:07:39,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:39,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 07:07:39,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 07:07:39,936 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 3 states. [2020-12-23 07:07:39,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:39,990 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2020-12-23 07:07:39,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 07:07:39,991 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-12-23 07:07:39,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:39,992 INFO L225 Difference]: With dead ends: 22 [2020-12-23 07:07:39,992 INFO L226 Difference]: Without dead ends: 16 [2020-12-23 07:07:39,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 07:07:39,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-23 07:07:39,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-12-23 07:07:39,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-23 07:07:39,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-12-23 07:07:39,998 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 12 [2020-12-23 07:07:39,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:39,999 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-12-23 07:07:39,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 07:07:39,999 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-12-23 07:07:40,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 07:07:40,000 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:40,000 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:40,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-23 07:07:40,001 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:40,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:40,002 INFO L82 PathProgramCache]: Analyzing trace with hash 552494793, now seen corresponding path program 1 times [2020-12-23 07:07:40,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:40,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055291327] [2020-12-23 07:07:40,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:40,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:40,106 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:07:40,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055291327] [2020-12-23 07:07:40,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921830675] [2020-12-23 07:07:40,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:40,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:40,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 07:07:40,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:40,358 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:07:40,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:40,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 07:07:40,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677548496] [2020-12-23 07:07:40,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:07:40,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:40,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:07:40,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:07:40,377 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 6 states. [2020-12-23 07:07:40,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:40,459 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2020-12-23 07:07:40,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 07:07:40,461 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-12-23 07:07:40,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:40,463 INFO L225 Difference]: With dead ends: 26 [2020-12-23 07:07:40,467 INFO L226 Difference]: Without dead ends: 17 [2020-12-23 07:07:40,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:07:40,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-23 07:07:40,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-23 07:07:40,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-23 07:07:40,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-12-23 07:07:40,483 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2020-12-23 07:07:40,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:40,484 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-12-23 07:07:40,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:07:40,492 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-12-23 07:07:40,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 07:07:40,493 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:40,494 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:40,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:40,708 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:40,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:40,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1373657364, now seen corresponding path program 2 times [2020-12-23 07:07:40,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:40,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335323020] [2020-12-23 07:07:40,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:40,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:40,841 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:07:40,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335323020] [2020-12-23 07:07:40,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067169421] [2020-12-23 07:07:40,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:40,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:07:40,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:40,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 07:07:40,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:40,997 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:07:40,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:40,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 07:07:40,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919357891] [2020-12-23 07:07:40,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 07:07:40,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:40,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 07:07:41,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:07:41,000 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 7 states. [2020-12-23 07:07:41,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:41,048 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2020-12-23 07:07:41,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 07:07:41,064 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-12-23 07:07:41,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:41,065 INFO L225 Difference]: With dead ends: 28 [2020-12-23 07:07:41,065 INFO L226 Difference]: Without dead ends: 19 [2020-12-23 07:07:41,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:07:41,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-23 07:07:41,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-12-23 07:07:41,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-23 07:07:41,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-12-23 07:07:41,071 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2020-12-23 07:07:41,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:41,072 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-12-23 07:07:41,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 07:07:41,072 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-12-23 07:07:41,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 07:07:41,073 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:41,073 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:41,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:41,288 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:41,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:41,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1274975665, now seen corresponding path program 3 times [2020-12-23 07:07:41,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:41,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505962664] [2020-12-23 07:07:41,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:41,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:41,393 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:07:41,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505962664] [2020-12-23 07:07:41,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382234736] [2020-12-23 07:07:41,395 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:41,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 07:07:41,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:41,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 07:07:41,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:41,550 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-23 07:07:41,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:41,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2020-12-23 07:07:41,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649032634] [2020-12-23 07:07:41,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 07:07:41,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:41,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 07:07:41,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:07:41,553 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 10 states. [2020-12-23 07:07:41,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:41,748 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2020-12-23 07:07:41,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 07:07:41,749 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-12-23 07:07:41,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:41,750 INFO L225 Difference]: With dead ends: 33 [2020-12-23 07:07:41,750 INFO L226 Difference]: Without dead ends: 24 [2020-12-23 07:07:41,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2020-12-23 07:07:41,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-23 07:07:41,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-12-23 07:07:41,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-23 07:07:41,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-12-23 07:07:41,756 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 18 [2020-12-23 07:07:41,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:41,757 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-12-23 07:07:41,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 07:07:41,757 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-12-23 07:07:41,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 07:07:41,758 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:41,758 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:41,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:41,974 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:41,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:41,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1200989882, now seen corresponding path program 4 times [2020-12-23 07:07:41,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:41,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164988964] [2020-12-23 07:07:41,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:41,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:42,078 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 07:07:42,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164988964] [2020-12-23 07:07:42,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751199122] [2020-12-23 07:07:42,079 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:42,141 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:07:42,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:42,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 07:07:42,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:42,208 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 07:07:42,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:42,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-23 07:07:42,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610851692] [2020-12-23 07:07:42,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 07:07:42,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:42,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 07:07:42,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:07:42,211 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 9 states. [2020-12-23 07:07:42,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:42,267 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2020-12-23 07:07:42,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 07:07:42,268 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-12-23 07:07:42,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:42,268 INFO L225 Difference]: With dead ends: 34 [2020-12-23 07:07:42,269 INFO L226 Difference]: Without dead ends: 24 [2020-12-23 07:07:42,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:07:42,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-23 07:07:42,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-23 07:07:42,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 07:07:42,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-12-23 07:07:42,274 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 21 [2020-12-23 07:07:42,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:42,274 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-12-23 07:07:42,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 07:07:42,275 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-12-23 07:07:42,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 07:07:42,275 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:42,275 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:42,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:42,489 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:42,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:42,490 INFO L82 PathProgramCache]: Analyzing trace with hash 809863479, now seen corresponding path program 5 times [2020-12-23 07:07:42,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:42,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304331156] [2020-12-23 07:07:42,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:42,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:42,655 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 07:07:42,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304331156] [2020-12-23 07:07:42,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404615212] [2020-12-23 07:07:42,656 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:42,733 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-12-23 07:07:42,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:42,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 07:07:42,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:42,857 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 07:07:42,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:42,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 07:07:42,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510456471] [2020-12-23 07:07:42,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 07:07:42,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:42,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 07:07:42,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:07:42,864 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 10 states. [2020-12-23 07:07:42,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:42,950 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2020-12-23 07:07:42,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 07:07:42,951 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-12-23 07:07:42,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:42,951 INFO L225 Difference]: With dead ends: 36 [2020-12-23 07:07:42,952 INFO L226 Difference]: Without dead ends: 26 [2020-12-23 07:07:42,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:07:42,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-23 07:07:42,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-12-23 07:07:42,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-23 07:07:42,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-12-23 07:07:42,958 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 23 [2020-12-23 07:07:42,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:42,958 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-12-23 07:07:42,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 07:07:42,958 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-12-23 07:07:42,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 07:07:42,959 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:42,959 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:43,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:43,174 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:43,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:43,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1400455052, now seen corresponding path program 6 times [2020-12-23 07:07:43,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:43,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824434295] [2020-12-23 07:07:43,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:43,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:43,298 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 07:07:43,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824434295] [2020-12-23 07:07:43,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141151940] [2020-12-23 07:07:43,299 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:43,370 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 07:07:43,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:43,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 07:07:43,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:43,447 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-12-23 07:07:43,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:43,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2020-12-23 07:07:43,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782489303] [2020-12-23 07:07:43,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 07:07:43,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:43,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 07:07:43,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-12-23 07:07:43,450 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 14 states. [2020-12-23 07:07:43,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:43,639 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2020-12-23 07:07:43,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 07:07:43,639 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 25 [2020-12-23 07:07:43,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:43,640 INFO L225 Difference]: With dead ends: 41 [2020-12-23 07:07:43,640 INFO L226 Difference]: Without dead ends: 31 [2020-12-23 07:07:43,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2020-12-23 07:07:43,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-23 07:07:43,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-12-23 07:07:43,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-23 07:07:43,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-12-23 07:07:43,648 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 25 [2020-12-23 07:07:43,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:43,648 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-12-23 07:07:43,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 07:07:43,648 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-12-23 07:07:43,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 07:07:43,649 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:43,649 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:43,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:43,862 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:43,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:43,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1918510309, now seen corresponding path program 7 times [2020-12-23 07:07:43,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:43,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371499891] [2020-12-23 07:07:43,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:43,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:43,973 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 07:07:43,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371499891] [2020-12-23 07:07:43,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112059753] [2020-12-23 07:07:43,974 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:44,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:44,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 07:07:44,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:44,089 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 07:07:44,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:44,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 07:07:44,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640593028] [2020-12-23 07:07:44,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 07:07:44,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:44,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 07:07:44,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:07:44,092 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 12 states. [2020-12-23 07:07:44,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:44,161 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2020-12-23 07:07:44,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 07:07:44,161 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-12-23 07:07:44,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:44,166 INFO L225 Difference]: With dead ends: 42 [2020-12-23 07:07:44,166 INFO L226 Difference]: Without dead ends: 31 [2020-12-23 07:07:44,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:07:44,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-23 07:07:44,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-12-23 07:07:44,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 07:07:44,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-12-23 07:07:44,184 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 28 [2020-12-23 07:07:44,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:44,185 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-12-23 07:07:44,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 07:07:44,185 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-12-23 07:07:44,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 07:07:44,190 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:44,190 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:44,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 07:07:44,405 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:44,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:44,406 INFO L82 PathProgramCache]: Analyzing trace with hash -727277058, now seen corresponding path program 8 times [2020-12-23 07:07:44,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:44,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996944033] [2020-12-23 07:07:44,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:44,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:44,537 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 07:07:44,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996944033] [2020-12-23 07:07:44,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38734114] [2020-12-23 07:07:44,538 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:44,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:07:44,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:44,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 07:07:44,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:44,726 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 07:07:44,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:44,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 07:07:44,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244884243] [2020-12-23 07:07:44,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 07:07:44,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:44,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 07:07:44,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:07:44,729 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 13 states. [2020-12-23 07:07:44,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:44,798 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2020-12-23 07:07:44,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 07:07:44,799 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-12-23 07:07:44,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:44,799 INFO L225 Difference]: With dead ends: 44 [2020-12-23 07:07:44,799 INFO L226 Difference]: Without dead ends: 33 [2020-12-23 07:07:44,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:07:44,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-23 07:07:44,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-12-23 07:07:44,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 07:07:44,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-12-23 07:07:44,806 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 30 [2020-12-23 07:07:44,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:44,806 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-12-23 07:07:44,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 07:07:44,807 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-12-23 07:07:44,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 07:07:44,807 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:44,807 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:45,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:45,022 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:45,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:45,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1586576417, now seen corresponding path program 9 times [2020-12-23 07:07:45,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:45,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139996852] [2020-12-23 07:07:45,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:45,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:45,219 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 07:07:45,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139996852] [2020-12-23 07:07:45,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340165810] [2020-12-23 07:07:45,220 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 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 [2020-12-23 07:07:45,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 07:07:45,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:45,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 07:07:45,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:45,370 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-12-23 07:07:45,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:45,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 18 [2020-12-23 07:07:45,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141608045] [2020-12-23 07:07:45,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 07:07:45,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:45,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 07:07:45,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2020-12-23 07:07:45,375 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 18 states. [2020-12-23 07:07:45,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:45,598 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2020-12-23 07:07:45,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 07:07:45,598 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 32 [2020-12-23 07:07:45,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:45,599 INFO L225 Difference]: With dead ends: 49 [2020-12-23 07:07:45,599 INFO L226 Difference]: Without dead ends: 38 [2020-12-23 07:07:45,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=285, Invalid=527, Unknown=0, NotChecked=0, Total=812 [2020-12-23 07:07:45,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-23 07:07:45,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-12-23 07:07:45,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-23 07:07:45,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-12-23 07:07:45,605 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 32 [2020-12-23 07:07:45,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:45,605 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-12-23 07:07:45,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 07:07:45,605 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-12-23 07:07:45,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-23 07:07:45,606 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:45,606 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:45,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:45,816 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:45,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:45,817 INFO L82 PathProgramCache]: Analyzing trace with hash -275333016, now seen corresponding path program 10 times [2020-12-23 07:07:45,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:45,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593673087] [2020-12-23 07:07:45,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:45,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:46,011 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-23 07:07:46,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593673087] [2020-12-23 07:07:46,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91420804] [2020-12-23 07:07:46,017 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 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 [2020-12-23 07:07:46,090 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:07:46,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:46,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 07:07:46,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:46,184 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-23 07:07:46,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:46,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-23 07:07:46,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111821817] [2020-12-23 07:07:46,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 07:07:46,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:46,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 07:07:46,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 07:07:46,188 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 15 states. [2020-12-23 07:07:46,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:46,277 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2020-12-23 07:07:46,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 07:07:46,278 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 35 [2020-12-23 07:07:46,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:46,281 INFO L225 Difference]: With dead ends: 50 [2020-12-23 07:07:46,281 INFO L226 Difference]: Without dead ends: 38 [2020-12-23 07:07:46,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 07:07:46,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-23 07:07:46,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-12-23 07:07:46,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-23 07:07:46,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-12-23 07:07:46,295 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 35 [2020-12-23 07:07:46,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:46,296 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-12-23 07:07:46,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 07:07:46,296 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-12-23 07:07:46,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 07:07:46,297 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:46,297 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:46,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 07:07:46,513 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:46,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:46,514 INFO L82 PathProgramCache]: Analyzing trace with hash 234226725, now seen corresponding path program 11 times [2020-12-23 07:07:46,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:46,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95611404] [2020-12-23 07:07:46,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:46,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:46,702 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-23 07:07:46,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95611404] [2020-12-23 07:07:46,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612672869] [2020-12-23 07:07:46,704 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 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 [2020-12-23 07:07:46,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-12-23 07:07:46,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:46,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 07:07:46,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:46,878 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-23 07:07:46,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:46,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-23 07:07:46,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39822841] [2020-12-23 07:07:46,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 07:07:46,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:46,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 07:07:46,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 07:07:46,887 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 16 states. [2020-12-23 07:07:46,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:46,966 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2020-12-23 07:07:46,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 07:07:46,967 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2020-12-23 07:07:46,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:46,969 INFO L225 Difference]: With dead ends: 52 [2020-12-23 07:07:46,969 INFO L226 Difference]: Without dead ends: 40 [2020-12-23 07:07:46,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 07:07:46,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-23 07:07:46,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-12-23 07:07:46,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-23 07:07:46,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-12-23 07:07:46,983 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 37 [2020-12-23 07:07:46,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:46,986 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-12-23 07:07:46,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 07:07:46,986 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-12-23 07:07:46,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-23 07:07:46,988 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:46,989 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:47,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 07:07:47,192 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:47,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:47,193 INFO L82 PathProgramCache]: Analyzing trace with hash 294866082, now seen corresponding path program 12 times [2020-12-23 07:07:47,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:47,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009539911] [2020-12-23 07:07:47,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:47,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:47,419 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-23 07:07:47,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009539911] [2020-12-23 07:07:47,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225929860] [2020-12-23 07:07:47,420 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 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 [2020-12-23 07:07:47,483 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-23 07:07:47,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:47,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 07:07:47,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:47,622 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2020-12-23 07:07:47,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:47,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8] total 22 [2020-12-23 07:07:47,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468703703] [2020-12-23 07:07:47,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 07:07:47,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:47,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 07:07:47,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-12-23 07:07:47,625 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 22 states. [2020-12-23 07:07:47,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:47,916 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2020-12-23 07:07:47,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 07:07:47,916 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 39 [2020-12-23 07:07:47,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:47,917 INFO L225 Difference]: With dead ends: 57 [2020-12-23 07:07:47,917 INFO L226 Difference]: Without dead ends: 45 [2020-12-23 07:07:47,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=441, Invalid=819, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 07:07:47,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-23 07:07:47,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2020-12-23 07:07:47,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-23 07:07:47,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-12-23 07:07:47,924 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 39 [2020-12-23 07:07:47,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:47,924 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-12-23 07:07:47,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 07:07:47,924 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-12-23 07:07:47,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-23 07:07:47,925 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:47,925 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:48,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 07:07:48,139 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:48,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:48,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1121567891, now seen corresponding path program 13 times [2020-12-23 07:07:48,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:48,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760232956] [2020-12-23 07:07:48,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:48,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:48,351 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 07:07:48,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760232956] [2020-12-23 07:07:48,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163920149] [2020-12-23 07:07:48,351 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 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 [2020-12-23 07:07:48,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:48,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 07:07:48,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:48,512 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 07:07:48,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:48,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-23 07:07:48,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305686373] [2020-12-23 07:07:48,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 07:07:48,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:48,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 07:07:48,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 07:07:48,520 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 18 states. [2020-12-23 07:07:48,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:48,608 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2020-12-23 07:07:48,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 07:07:48,609 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 42 [2020-12-23 07:07:48,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:48,609 INFO L225 Difference]: With dead ends: 58 [2020-12-23 07:07:48,612 INFO L226 Difference]: Without dead ends: 45 [2020-12-23 07:07:48,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 07:07:48,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-23 07:07:48,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-12-23 07:07:48,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-23 07:07:48,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-12-23 07:07:48,621 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 42 [2020-12-23 07:07:48,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:48,623 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-12-23 07:07:48,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 07:07:48,623 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-12-23 07:07:48,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-23 07:07:48,624 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:48,624 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:48,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:48,838 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:48,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:48,839 INFO L82 PathProgramCache]: Analyzing trace with hash 635681040, now seen corresponding path program 14 times [2020-12-23 07:07:48,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:48,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444901572] [2020-12-23 07:07:48,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:48,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:49,030 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 07:07:49,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444901572] [2020-12-23 07:07:49,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798542298] [2020-12-23 07:07:49,031 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 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 [2020-12-23 07:07:49,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:07:49,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:49,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 07:07:49,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:49,190 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 07:07:49,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:49,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-23 07:07:49,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86667298] [2020-12-23 07:07:49,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 07:07:49,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:49,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 07:07:49,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 07:07:49,194 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 19 states. [2020-12-23 07:07:49,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:49,263 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2020-12-23 07:07:49,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 07:07:49,264 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 44 [2020-12-23 07:07:49,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:49,264 INFO L225 Difference]: With dead ends: 60 [2020-12-23 07:07:49,264 INFO L226 Difference]: Without dead ends: 47 [2020-12-23 07:07:49,265 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 07:07:49,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-23 07:07:49,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-12-23 07:07:49,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-23 07:07:49,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-12-23 07:07:49,271 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 44 [2020-12-23 07:07:49,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:49,271 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-12-23 07:07:49,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 07:07:49,272 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-12-23 07:07:49,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 07:07:49,272 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:49,272 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:49,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:49,487 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:49,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:49,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1429756403, now seen corresponding path program 15 times [2020-12-23 07:07:49,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:49,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978242671] [2020-12-23 07:07:49,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:49,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:49,705 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 07:07:49,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978242671] [2020-12-23 07:07:49,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429876186] [2020-12-23 07:07:49,706 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 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 [2020-12-23 07:07:49,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 07:07:49,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:49,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 07:07:49,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:49,848 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 48 proven. 1 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2020-12-23 07:07:49,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:49,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 4] total 21 [2020-12-23 07:07:49,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973259652] [2020-12-23 07:07:49,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 07:07:49,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:49,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 07:07:49,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 07:07:49,850 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 21 states. [2020-12-23 07:07:49,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:49,953 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2020-12-23 07:07:49,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 07:07:49,954 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 46 [2020-12-23 07:07:49,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:49,956 INFO L225 Difference]: With dead ends: 65 [2020-12-23 07:07:49,956 INFO L226 Difference]: Without dead ends: 52 [2020-12-23 07:07:49,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 07:07:49,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-23 07:07:49,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-12-23 07:07:49,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-23 07:07:49,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2020-12-23 07:07:49,963 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 46 [2020-12-23 07:07:49,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:49,964 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2020-12-23 07:07:49,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 07:07:49,964 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2020-12-23 07:07:49,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-23 07:07:49,964 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:49,965 INFO L422 BasicCegarLoop]: trace histogram [19, 17, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:50,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:50,178 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:50,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:50,179 INFO L82 PathProgramCache]: Analyzing trace with hash 527553147, now seen corresponding path program 16 times [2020-12-23 07:07:50,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:50,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035180411] [2020-12-23 07:07:50,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:50,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:50,415 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 54 proven. 306 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-23 07:07:50,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035180411] [2020-12-23 07:07:50,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112404884] [2020-12-23 07:07:50,416 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 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 [2020-12-23 07:07:50,476 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:07:50,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:50,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 07:07:50,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:50,557 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 54 proven. 306 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-23 07:07:50,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:50,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-23 07:07:50,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435854909] [2020-12-23 07:07:50,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 07:07:50,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:50,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 07:07:50,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 07:07:50,561 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand 21 states. [2020-12-23 07:07:50,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:50,630 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2020-12-23 07:07:50,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 07:07:50,630 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 50 [2020-12-23 07:07:50,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:50,631 INFO L225 Difference]: With dead ends: 68 [2020-12-23 07:07:50,631 INFO L226 Difference]: Without dead ends: 53 [2020-12-23 07:07:50,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 07:07:50,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-23 07:07:50,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-12-23 07:07:50,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-23 07:07:50,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2020-12-23 07:07:50,641 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 50 [2020-12-23 07:07:50,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:50,641 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2020-12-23 07:07:50,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 07:07:50,642 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2020-12-23 07:07:50,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-23 07:07:50,642 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:50,642 INFO L422 BasicCegarLoop]: trace histogram [20, 18, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:50,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-23 07:07:50,856 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:50,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:50,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1291123998, now seen corresponding path program 17 times [2020-12-23 07:07:50,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:50,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804318768] [2020-12-23 07:07:50,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:50,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:51,127 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 57 proven. 342 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-23 07:07:51,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804318768] [2020-12-23 07:07:51,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227688997] [2020-12-23 07:07:51,128 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 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 [2020-12-23 07:07:51,187 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2020-12-23 07:07:51,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:51,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 07:07:51,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:51,296 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 57 proven. 342 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-23 07:07:51,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:51,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-23 07:07:51,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081686754] [2020-12-23 07:07:51,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 07:07:51,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:51,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 07:07:51,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 07:07:51,299 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 22 states. [2020-12-23 07:07:51,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:51,398 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2020-12-23 07:07:51,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 07:07:51,399 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2020-12-23 07:07:51,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:51,399 INFO L225 Difference]: With dead ends: 70 [2020-12-23 07:07:51,399 INFO L226 Difference]: Without dead ends: 55 [2020-12-23 07:07:51,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 07:07:51,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-23 07:07:51,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-12-23 07:07:51,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-23 07:07:51,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2020-12-23 07:07:51,405 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 52 [2020-12-23 07:07:51,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:51,406 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2020-12-23 07:07:51,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 07:07:51,406 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2020-12-23 07:07:51,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-23 07:07:51,406 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:51,407 INFO L422 BasicCegarLoop]: trace histogram [21, 19, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:51,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 07:07:51,620 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:51,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:51,621 INFO L82 PathProgramCache]: Analyzing trace with hash 643304193, now seen corresponding path program 18 times [2020-12-23 07:07:51,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:51,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888676183] [2020-12-23 07:07:51,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:51,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:51,931 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 60 proven. 380 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-23 07:07:51,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888676183] [2020-12-23 07:07:51,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555574749] [2020-12-23 07:07:51,932 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 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 [2020-12-23 07:07:51,999 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 07:07:51,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:52,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 07:07:52,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:52,164 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 61 proven. 15 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2020-12-23 07:07:52,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:52,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 9] total 29 [2020-12-23 07:07:52,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797614167] [2020-12-23 07:07:52,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 07:07:52,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:52,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 07:07:52,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=546, Unknown=0, NotChecked=0, Total=812 [2020-12-23 07:07:52,167 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 29 states. [2020-12-23 07:07:52,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:52,671 INFO L93 Difference]: Finished difference Result 79 states and 90 transitions. [2020-12-23 07:07:52,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 07:07:52,672 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 54 [2020-12-23 07:07:52,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:52,672 INFO L225 Difference]: With dead ends: 79 [2020-12-23 07:07:52,672 INFO L226 Difference]: Without dead ends: 64 [2020-12-23 07:07:52,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=806, Invalid=1546, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 07:07:52,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-23 07:07:52,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2020-12-23 07:07:52,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-23 07:07:52,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2020-12-23 07:07:52,680 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 54 [2020-12-23 07:07:52,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:52,680 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2020-12-23 07:07:52,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 07:07:52,680 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2020-12-23 07:07:52,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-23 07:07:52,681 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:52,681 INFO L422 BasicCegarLoop]: trace histogram [22, 20, 6, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:52,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 07:07:52,897 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:52,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:52,897 INFO L82 PathProgramCache]: Analyzing trace with hash 852476360, now seen corresponding path program 19 times [2020-12-23 07:07:52,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:52,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799765836] [2020-12-23 07:07:52,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:52,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:53,187 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 63 proven. 420 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-23 07:07:53,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799765836] [2020-12-23 07:07:53,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216469914] [2020-12-23 07:07:53,188 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 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 [2020-12-23 07:07:53,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:53,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 07:07:53,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:53,318 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 63 proven. 420 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-23 07:07:53,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:53,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-23 07:07:53,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336153905] [2020-12-23 07:07:53,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 07:07:53,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:53,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 07:07:53,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-23 07:07:53,321 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand 24 states. [2020-12-23 07:07:53,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:53,420 INFO L93 Difference]: Finished difference Result 76 states and 83 transitions. [2020-12-23 07:07:53,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 07:07:53,420 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 57 [2020-12-23 07:07:53,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:53,421 INFO L225 Difference]: With dead ends: 76 [2020-12-23 07:07:53,421 INFO L226 Difference]: Without dead ends: 60 [2020-12-23 07:07:53,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-23 07:07:53,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-23 07:07:53,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-12-23 07:07:53,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-23 07:07:53,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2020-12-23 07:07:53,427 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 57 [2020-12-23 07:07:53,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:53,427 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2020-12-23 07:07:53,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 07:07:53,427 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2020-12-23 07:07:53,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-23 07:07:53,428 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:53,428 INFO L422 BasicCegarLoop]: trace histogram [23, 21, 6, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:53,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 07:07:53,642 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:53,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:53,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1906895301, now seen corresponding path program 20 times [2020-12-23 07:07:53,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:53,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914178450] [2020-12-23 07:07:53,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:53,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:53,995 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 66 proven. 462 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-23 07:07:53,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914178450] [2020-12-23 07:07:53,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959098083] [2020-12-23 07:07:53,996 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 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 [2020-12-23 07:07:54,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:07:54,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:54,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 07:07:54,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:54,132 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 66 proven. 462 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-23 07:07:54,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:54,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-23 07:07:54,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547266233] [2020-12-23 07:07:54,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 07:07:54,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:54,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 07:07:54,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-23 07:07:54,135 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand 25 states. [2020-12-23 07:07:54,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:54,226 INFO L93 Difference]: Finished difference Result 78 states and 85 transitions. [2020-12-23 07:07:54,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 07:07:54,226 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 59 [2020-12-23 07:07:54,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:54,227 INFO L225 Difference]: With dead ends: 78 [2020-12-23 07:07:54,227 INFO L226 Difference]: Without dead ends: 62 [2020-12-23 07:07:54,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-23 07:07:54,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-23 07:07:54,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-12-23 07:07:54,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-23 07:07:54,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2020-12-23 07:07:54,232 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 59 [2020-12-23 07:07:54,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:54,233 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2020-12-23 07:07:54,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 07:07:54,233 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2020-12-23 07:07:54,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-23 07:07:54,233 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:54,233 INFO L422 BasicCegarLoop]: trace histogram [24, 22, 6, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:54,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-23 07:07:54,448 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:54,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:54,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1591215746, now seen corresponding path program 21 times [2020-12-23 07:07:54,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:54,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164286621] [2020-12-23 07:07:54,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:54,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:54,819 INFO L134 CoverageAnalysis]: Checked inductivity of 597 backedges. 69 proven. 506 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-23 07:07:54,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164286621] [2020-12-23 07:07:54,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349793250] [2020-12-23 07:07:54,825 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 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 [2020-12-23 07:07:54,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 07:07:54,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:54,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 07:07:54,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:55,110 INFO L134 CoverageAnalysis]: Checked inductivity of 597 backedges. 70 proven. 21 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2020-12-23 07:07:55,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:55,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 10] total 33 [2020-12-23 07:07:55,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776966126] [2020-12-23 07:07:55,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 07:07:55,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:55,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 07:07:55,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=712, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 07:07:55,112 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand 33 states. [2020-12-23 07:07:55,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:55,801 INFO L93 Difference]: Finished difference Result 87 states and 98 transitions. [2020-12-23 07:07:55,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-23 07:07:55,802 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 61 [2020-12-23 07:07:55,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:55,802 INFO L225 Difference]: With dead ends: 87 [2020-12-23 07:07:55,803 INFO L226 Difference]: Without dead ends: 71 [2020-12-23 07:07:55,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1057, Invalid=2023, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 07:07:55,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-23 07:07:55,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 65. [2020-12-23 07:07:55,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-23 07:07:55,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2020-12-23 07:07:55,810 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 61 [2020-12-23 07:07:55,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:55,810 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2020-12-23 07:07:55,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 07:07:55,810 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2020-12-23 07:07:55,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-23 07:07:55,811 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:55,811 INFO L422 BasicCegarLoop]: trace histogram [25, 23, 7, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:56,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:56,026 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:56,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:56,027 INFO L82 PathProgramCache]: Analyzing trace with hash -641498803, now seen corresponding path program 22 times [2020-12-23 07:07:56,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:56,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875224355] [2020-12-23 07:07:56,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:56,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:56,449 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 72 proven. 552 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-12-23 07:07:56,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875224355] [2020-12-23 07:07:56,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575087668] [2020-12-23 07:07:56,450 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 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 [2020-12-23 07:07:56,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:07:56,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:56,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 07:07:56,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:56,629 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 72 proven. 552 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-12-23 07:07:56,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:56,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-23 07:07:56,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194450783] [2020-12-23 07:07:56,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 07:07:56,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:56,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 07:07:56,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-23 07:07:56,632 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand 27 states. [2020-12-23 07:07:56,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:56,735 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2020-12-23 07:07:56,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 07:07:56,736 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 64 [2020-12-23 07:07:56,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:56,736 INFO L225 Difference]: With dead ends: 84 [2020-12-23 07:07:56,736 INFO L226 Difference]: Without dead ends: 67 [2020-12-23 07:07:56,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-23 07:07:56,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-23 07:07:56,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-12-23 07:07:56,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-23 07:07:56,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2020-12-23 07:07:56,742 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 64 [2020-12-23 07:07:56,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:56,743 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2020-12-23 07:07:56,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 07:07:56,743 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2020-12-23 07:07:56,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-23 07:07:56,743 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:56,744 INFO L422 BasicCegarLoop]: trace histogram [26, 24, 7, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:56,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 07:07:56,956 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:56,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:56,957 INFO L82 PathProgramCache]: Analyzing trace with hash -601238864, now seen corresponding path program 23 times [2020-12-23 07:07:56,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:56,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906371456] [2020-12-23 07:07:56,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:56,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:57,387 INFO L134 CoverageAnalysis]: Checked inductivity of 704 backedges. 75 proven. 600 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-12-23 07:07:57,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906371456] [2020-12-23 07:07:57,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838534831] [2020-12-23 07:07:57,388 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 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 [2020-12-23 07:07:57,462 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 27 check-sat command(s) [2020-12-23 07:07:57,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:57,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 07:07:57,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:57,545 INFO L134 CoverageAnalysis]: Checked inductivity of 704 backedges. 75 proven. 600 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-12-23 07:07:57,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:57,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-23 07:07:57,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439811576] [2020-12-23 07:07:57,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 07:07:57,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:57,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 07:07:57,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-23 07:07:57,547 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand 28 states. [2020-12-23 07:07:57,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:57,683 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2020-12-23 07:07:57,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 07:07:57,683 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 66 [2020-12-23 07:07:57,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:57,684 INFO L225 Difference]: With dead ends: 86 [2020-12-23 07:07:57,684 INFO L226 Difference]: Without dead ends: 69 [2020-12-23 07:07:57,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-23 07:07:57,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-23 07:07:57,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-12-23 07:07:57,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-23 07:07:57,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2020-12-23 07:07:57,690 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 66 [2020-12-23 07:07:57,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:57,690 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2020-12-23 07:07:57,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 07:07:57,691 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2020-12-23 07:07:57,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-23 07:07:57,691 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:57,691 INFO L422 BasicCegarLoop]: trace histogram [27, 25, 7, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:57,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:57,903 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:57,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:57,904 INFO L82 PathProgramCache]: Analyzing trace with hash -566143149, now seen corresponding path program 24 times [2020-12-23 07:07:57,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:57,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486042761] [2020-12-23 07:07:57,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:57,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:58,389 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 78 proven. 650 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-12-23 07:07:58,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486042761] [2020-12-23 07:07:58,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868692084] [2020-12-23 07:07:58,389 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 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 [2020-12-23 07:07:58,455 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-23 07:07:58,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:58,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 07:07:58,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:58,741 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 79 proven. 28 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2020-12-23 07:07:58,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:58,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 11] total 37 [2020-12-23 07:07:58,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586337798] [2020-12-23 07:07:58,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 07:07:58,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:58,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 07:07:58,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=432, Invalid=900, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 07:07:58,744 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand 37 states. [2020-12-23 07:07:59,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:59,652 INFO L93 Difference]: Finished difference Result 95 states and 106 transitions. [2020-12-23 07:07:59,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 07:07:59,653 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 68 [2020-12-23 07:07:59,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:59,654 INFO L225 Difference]: With dead ends: 95 [2020-12-23 07:07:59,654 INFO L226 Difference]: Without dead ends: 78 [2020-12-23 07:07:59,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1342, Invalid=2564, Unknown=0, NotChecked=0, Total=3906 [2020-12-23 07:07:59,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-23 07:07:59,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2020-12-23 07:07:59,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-23 07:07:59,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2020-12-23 07:07:59,662 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 68 [2020-12-23 07:07:59,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:59,662 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2020-12-23 07:07:59,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 07:07:59,662 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2020-12-23 07:07:59,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-23 07:07:59,663 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:59,663 INFO L422 BasicCegarLoop]: trace histogram [28, 26, 8, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:59,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 07:07:59,877 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:59,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:59,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1490489590, now seen corresponding path program 25 times [2020-12-23 07:07:59,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:59,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417934075] [2020-12-23 07:07:59,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:59,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:00,365 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 81 proven. 702 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-23 07:08:00,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417934075] [2020-12-23 07:08:00,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141991951] [2020-12-23 07:08:00,366 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 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 [2020-12-23 07:08:00,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:00,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 07:08:00,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:00,545 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 81 proven. 702 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-23 07:08:00,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:00,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-23 07:08:00,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857970915] [2020-12-23 07:08:00,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 07:08:00,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:00,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 07:08:00,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-23 07:08:00,548 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand 30 states. [2020-12-23 07:08:00,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:00,690 INFO L93 Difference]: Finished difference Result 92 states and 99 transitions. [2020-12-23 07:08:00,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 07:08:00,690 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 71 [2020-12-23 07:08:00,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:00,691 INFO L225 Difference]: With dead ends: 92 [2020-12-23 07:08:00,691 INFO L226 Difference]: Without dead ends: 74 [2020-12-23 07:08:00,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-23 07:08:00,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-23 07:08:00,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-12-23 07:08:00,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-23 07:08:00,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2020-12-23 07:08:00,697 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 71 [2020-12-23 07:08:00,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:00,698 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2020-12-23 07:08:00,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 07:08:00,698 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2020-12-23 07:08:00,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-23 07:08:00,699 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:00,699 INFO L422 BasicCegarLoop]: trace histogram [29, 27, 8, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:00,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:00,913 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:00,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:00,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1660418611, now seen corresponding path program 26 times [2020-12-23 07:08:00,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:00,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144950892] [2020-12-23 07:08:00,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:00,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:01,411 INFO L134 CoverageAnalysis]: Checked inductivity of 877 backedges. 84 proven. 756 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-23 07:08:01,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144950892] [2020-12-23 07:08:01,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26043469] [2020-12-23 07:08:01,412 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 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 [2020-12-23 07:08:01,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:08:01,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:01,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 07:08:01,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:01,586 INFO L134 CoverageAnalysis]: Checked inductivity of 877 backedges. 84 proven. 756 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-23 07:08:01,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:01,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-12-23 07:08:01,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591114835] [2020-12-23 07:08:01,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 07:08:01,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:01,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 07:08:01,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-23 07:08:01,589 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand 31 states. [2020-12-23 07:08:01,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:01,719 INFO L93 Difference]: Finished difference Result 94 states and 101 transitions. [2020-12-23 07:08:01,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 07:08:01,719 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 73 [2020-12-23 07:08:01,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:01,720 INFO L225 Difference]: With dead ends: 94 [2020-12-23 07:08:01,720 INFO L226 Difference]: Without dead ends: 76 [2020-12-23 07:08:01,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-23 07:08:01,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-23 07:08:01,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-12-23 07:08:01,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-23 07:08:01,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2020-12-23 07:08:01,728 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 73 [2020-12-23 07:08:01,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:01,728 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2020-12-23 07:08:01,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 07:08:01,729 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2020-12-23 07:08:01,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-23 07:08:01,729 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:01,730 INFO L422 BasicCegarLoop]: trace histogram [30, 28, 8, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:01,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-23 07:08:01,943 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:01,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:01,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1753450544, now seen corresponding path program 27 times [2020-12-23 07:08:01,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:01,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415199508] [2020-12-23 07:08:01,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:01,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:02,538 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 87 proven. 812 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-23 07:08:02,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415199508] [2020-12-23 07:08:02,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088644433] [2020-12-23 07:08:02,539 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 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 [2020-12-23 07:08:02,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-23 07:08:02,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:02,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 07:08:02,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:02,924 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 88 proven. 36 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2020-12-23 07:08:02,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:02,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 12] total 41 [2020-12-23 07:08:02,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430169321] [2020-12-23 07:08:02,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-23 07:08:02,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:02,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-23 07:08:02,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=1110, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 07:08:02,926 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand 41 states. [2020-12-23 07:08:04,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:04,007 INFO L93 Difference]: Finished difference Result 103 states and 114 transitions. [2020-12-23 07:08:04,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-23 07:08:04,008 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 75 [2020-12-23 07:08:04,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:04,009 INFO L225 Difference]: With dead ends: 103 [2020-12-23 07:08:04,009 INFO L226 Difference]: Without dead ends: 85 [2020-12-23 07:08:04,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1661, Invalid=3169, Unknown=0, NotChecked=0, Total=4830 [2020-12-23 07:08:04,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-12-23 07:08:04,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 79. [2020-12-23 07:08:04,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-23 07:08:04,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2020-12-23 07:08:04,017 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 75 [2020-12-23 07:08:04,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:04,017 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2020-12-23 07:08:04,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-23 07:08:04,018 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2020-12-23 07:08:04,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-23 07:08:04,018 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:04,019 INFO L422 BasicCegarLoop]: trace histogram [31, 29, 9, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:04,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:04,232 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:04,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:04,233 INFO L82 PathProgramCache]: Analyzing trace with hash -215532513, now seen corresponding path program 28 times [2020-12-23 07:08:04,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:04,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275677163] [2020-12-23 07:08:04,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:04,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:04,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1006 backedges. 90 proven. 870 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-23 07:08:04,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275677163] [2020-12-23 07:08:04,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409694836] [2020-12-23 07:08:04,897 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 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 [2020-12-23 07:08:04,965 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:08:04,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:04,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 07:08:04,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:05,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1006 backedges. 90 proven. 870 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-23 07:08:05,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:05,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-12-23 07:08:05,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918472959] [2020-12-23 07:08:05,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 07:08:05,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:05,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 07:08:05,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 07:08:05,085 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand 33 states. [2020-12-23 07:08:05,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:05,246 INFO L93 Difference]: Finished difference Result 100 states and 107 transitions. [2020-12-23 07:08:05,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 07:08:05,246 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 78 [2020-12-23 07:08:05,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:05,247 INFO L225 Difference]: With dead ends: 100 [2020-12-23 07:08:05,247 INFO L226 Difference]: Without dead ends: 81 [2020-12-23 07:08:05,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 07:08:05,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-23 07:08:05,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-12-23 07:08:05,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-23 07:08:05,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2020-12-23 07:08:05,253 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 78 [2020-12-23 07:08:05,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:05,254 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2020-12-23 07:08:05,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 07:08:05,254 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2020-12-23 07:08:05,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-23 07:08:05,254 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:05,255 INFO L422 BasicCegarLoop]: trace histogram [32, 30, 9, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:05,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-23 07:08:05,469 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:05,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:05,469 INFO L82 PathProgramCache]: Analyzing trace with hash -142220222, now seen corresponding path program 29 times [2020-12-23 07:08:05,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:05,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828734008] [2020-12-23 07:08:05,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:05,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:06,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1069 backedges. 93 proven. 930 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-23 07:08:06,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828734008] [2020-12-23 07:08:06,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562475339] [2020-12-23 07:08:06,165 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 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 [2020-12-23 07:08:06,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 33 check-sat command(s) [2020-12-23 07:08:06,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:06,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 07:08:06,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:06,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1069 backedges. 93 proven. 930 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-23 07:08:06,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:06,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-12-23 07:08:06,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452687973] [2020-12-23 07:08:06,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 07:08:06,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:06,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 07:08:06,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 07:08:06,347 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand 34 states. [2020-12-23 07:08:06,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:06,507 INFO L93 Difference]: Finished difference Result 102 states and 109 transitions. [2020-12-23 07:08:06,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-23 07:08:06,508 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 80 [2020-12-23 07:08:06,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:06,508 INFO L225 Difference]: With dead ends: 102 [2020-12-23 07:08:06,509 INFO L226 Difference]: Without dead ends: 83 [2020-12-23 07:08:06,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 07:08:06,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-23 07:08:06,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-12-23 07:08:06,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-23 07:08:06,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2020-12-23 07:08:06,518 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 80 [2020-12-23 07:08:06,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:06,518 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2020-12-23 07:08:06,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 07:08:06,519 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2020-12-23 07:08:06,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-23 07:08:06,519 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:06,519 INFO L422 BasicCegarLoop]: trace histogram [33, 31, 9, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:06,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:06,733 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:06,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:06,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1591414693, now seen corresponding path program 30 times [2020-12-23 07:08:06,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:06,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802421262] [2020-12-23 07:08:06,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:06,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:07,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 96 proven. 992 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-23 07:08:07,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802421262] [2020-12-23 07:08:07,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707481169] [2020-12-23 07:08:07,430 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 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 [2020-12-23 07:08:07,502 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-12-23 07:08:07,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:07,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 07:08:07,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:07,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 97 proven. 45 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2020-12-23 07:08:07,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:07,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 13] total 45 [2020-12-23 07:08:07,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301403275] [2020-12-23 07:08:07,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-23 07:08:07,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:07,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-23 07:08:07,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=638, Invalid=1342, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 07:08:07,891 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand 45 states. [2020-12-23 07:08:08,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:08,988 INFO L93 Difference]: Finished difference Result 111 states and 122 transitions. [2020-12-23 07:08:08,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-23 07:08:08,989 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 82 [2020-12-23 07:08:08,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:08,990 INFO L225 Difference]: With dead ends: 111 [2020-12-23 07:08:08,990 INFO L226 Difference]: Without dead ends: 92 [2020-12-23 07:08:08,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2014, Invalid=3838, Unknown=0, NotChecked=0, Total=5852 [2020-12-23 07:08:08,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-23 07:08:08,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 86. [2020-12-23 07:08:08,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-12-23 07:08:08,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 89 transitions. [2020-12-23 07:08:08,997 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 89 transitions. Word has length 82 [2020-12-23 07:08:08,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:08,998 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 89 transitions. [2020-12-23 07:08:08,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-23 07:08:08,998 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 89 transitions. [2020-12-23 07:08:08,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-23 07:08:08,998 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:08,998 INFO L422 BasicCegarLoop]: trace histogram [34, 32, 10, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:09,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-23 07:08:09,199 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:09,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:09,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1826898980, now seen corresponding path program 31 times [2020-12-23 07:08:09,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:09,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664003015] [2020-12-23 07:08:09,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:09,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:09,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1211 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-12-23 07:08:09,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664003015] [2020-12-23 07:08:09,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882015122] [2020-12-23 07:08:09,979 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 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 [2020-12-23 07:08:10,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:10,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 07:08:10,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:10,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1211 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-12-23 07:08:10,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:10,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-12-23 07:08:10,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538007269] [2020-12-23 07:08:10,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-23 07:08:10,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:10,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-23 07:08:10,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 07:08:10,193 INFO L87 Difference]: Start difference. First operand 86 states and 89 transitions. Second operand 36 states. [2020-12-23 07:08:10,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:10,360 INFO L93 Difference]: Finished difference Result 108 states and 115 transitions. [2020-12-23 07:08:10,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-23 07:08:10,361 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 85 [2020-12-23 07:08:10,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:10,362 INFO L225 Difference]: With dead ends: 108 [2020-12-23 07:08:10,362 INFO L226 Difference]: Without dead ends: 88 [2020-12-23 07:08:10,363 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 07:08:10,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-23 07:08:10,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-12-23 07:08:10,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-23 07:08:10,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 91 transitions. [2020-12-23 07:08:10,369 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 91 transitions. Word has length 85 [2020-12-23 07:08:10,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:10,369 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 91 transitions. [2020-12-23 07:08:10,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-23 07:08:10,369 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 91 transitions. [2020-12-23 07:08:10,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-23 07:08:10,370 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:10,370 INFO L422 BasicCegarLoop]: trace histogram [35, 33, 10, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:10,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-23 07:08:10,584 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:10,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:10,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1543618209, now seen corresponding path program 32 times [2020-12-23 07:08:10,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:10,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084973259] [2020-12-23 07:08:10,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:10,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:11,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 102 proven. 1122 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-12-23 07:08:11,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084973259] [2020-12-23 07:08:11,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648819423] [2020-12-23 07:08:11,296 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 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 [2020-12-23 07:08:11,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:08:11,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:11,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 07:08:11,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:11,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 102 proven. 1122 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-12-23 07:08:11,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:11,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-12-23 07:08:11,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105690973] [2020-12-23 07:08:11,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 07:08:11,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:11,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 07:08:11,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 07:08:11,512 INFO L87 Difference]: Start difference. First operand 88 states and 91 transitions. Second operand 37 states. [2020-12-23 07:08:11,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:11,714 INFO L93 Difference]: Finished difference Result 110 states and 117 transitions. [2020-12-23 07:08:11,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 07:08:11,714 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 87 [2020-12-23 07:08:11,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:11,715 INFO L225 Difference]: With dead ends: 110 [2020-12-23 07:08:11,716 INFO L226 Difference]: Without dead ends: 90 [2020-12-23 07:08:11,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 07:08:11,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-23 07:08:11,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-12-23 07:08:11,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-23 07:08:11,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 93 transitions. [2020-12-23 07:08:11,723 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 93 transitions. Word has length 87 [2020-12-23 07:08:11,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:11,723 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 93 transitions. [2020-12-23 07:08:11,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 07:08:11,723 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 93 transitions. [2020-12-23 07:08:11,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-23 07:08:11,724 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:11,724 INFO L422 BasicCegarLoop]: trace histogram [36, 34, 10, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:11,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-23 07:08:11,938 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:11,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:11,939 INFO L82 PathProgramCache]: Analyzing trace with hash -106263074, now seen corresponding path program 33 times [2020-12-23 07:08:11,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:11,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301448230] [2020-12-23 07:08:11,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:11,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:12,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1351 backedges. 105 proven. 1190 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-12-23 07:08:12,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301448230] [2020-12-23 07:08:12,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872874188] [2020-12-23 07:08:12,830 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 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 [2020-12-23 07:08:12,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-23 07:08:12,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:12,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 07:08:12,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:13,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1351 backedges. 170 proven. 4 refuted. 0 times theorem prover too weak. 1177 trivial. 0 not checked. [2020-12-23 07:08:13,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:13,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 5] total 40 [2020-12-23 07:08:13,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421351310] [2020-12-23 07:08:13,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 07:08:13,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:13,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 07:08:13,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 07:08:13,127 INFO L87 Difference]: Start difference. First operand 90 states and 93 transitions. Second operand 40 states. [2020-12-23 07:08:13,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:13,326 INFO L93 Difference]: Finished difference Result 115 states and 125 transitions. [2020-12-23 07:08:13,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 07:08:13,327 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 89 [2020-12-23 07:08:13,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:13,328 INFO L225 Difference]: With dead ends: 115 [2020-12-23 07:08:13,328 INFO L226 Difference]: Without dead ends: 95 [2020-12-23 07:08:13,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 07:08:13,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-23 07:08:13,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2020-12-23 07:08:13,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-23 07:08:13,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2020-12-23 07:08:13,335 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 89 [2020-12-23 07:08:13,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:13,335 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2020-12-23 07:08:13,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 07:08:13,335 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2020-12-23 07:08:13,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-23 07:08:13,336 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:13,336 INFO L422 BasicCegarLoop]: trace histogram [38, 35, 10, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:13,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-23 07:08:13,552 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:13,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:13,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1851451562, now seen corresponding path program 34 times [2020-12-23 07:08:13,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:13,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649230074] [2020-12-23 07:08:13,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:13,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:14,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1499 backedges. 180 proven. 1260 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-12-23 07:08:14,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649230074] [2020-12-23 07:08:14,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199234410] [2020-12-23 07:08:14,449 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 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 [2020-12-23 07:08:14,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:08:14,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:14,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-23 07:08:14,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:14,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1499 backedges. 180 proven. 1260 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-12-23 07:08:14,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:14,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-12-23 07:08:14,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378902428] [2020-12-23 07:08:14,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-23 07:08:14,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:14,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-23 07:08:14,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 07:08:14,641 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand 39 states. [2020-12-23 07:08:14,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:14,873 INFO L93 Difference]: Finished difference Result 118 states and 127 transitions. [2020-12-23 07:08:14,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-23 07:08:14,873 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 93 [2020-12-23 07:08:14,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:14,875 INFO L225 Difference]: With dead ends: 118 [2020-12-23 07:08:14,875 INFO L226 Difference]: Without dead ends: 96 [2020-12-23 07:08:14,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 07:08:14,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-23 07:08:14,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-12-23 07:08:14,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-23 07:08:14,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2020-12-23 07:08:14,886 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 93 [2020-12-23 07:08:14,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:14,887 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2020-12-23 07:08:14,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-23 07:08:14,887 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2020-12-23 07:08:14,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-23 07:08:14,887 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:14,888 INFO L422 BasicCegarLoop]: trace histogram [39, 36, 10, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:15,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-23 07:08:15,103 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:15,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:15,103 INFO L82 PathProgramCache]: Analyzing trace with hash 370328787, now seen corresponding path program 35 times [2020-12-23 07:08:15,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:15,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094700084] [2020-12-23 07:08:15,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:15,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:16,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1576 backedges. 185 proven. 1332 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-12-23 07:08:16,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094700084] [2020-12-23 07:08:16,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769129903] [2020-12-23 07:08:16,048 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 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 [2020-12-23 07:08:16,145 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2020-12-23 07:08:16,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:16,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-23 07:08:16,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:16,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1576 backedges. 185 proven. 1332 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-12-23 07:08:16,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:16,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-23 07:08:16,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112900758] [2020-12-23 07:08:16,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 07:08:16,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:16,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 07:08:16,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 07:08:16,299 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand 40 states. [2020-12-23 07:08:16,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:16,512 INFO L93 Difference]: Finished difference Result 120 states and 129 transitions. [2020-12-23 07:08:16,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-23 07:08:16,512 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 95 [2020-12-23 07:08:16,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:16,514 INFO L225 Difference]: With dead ends: 120 [2020-12-23 07:08:16,514 INFO L226 Difference]: Without dead ends: 98 [2020-12-23 07:08:16,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 07:08:16,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-23 07:08:16,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-12-23 07:08:16,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-12-23 07:08:16,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2020-12-23 07:08:16,522 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 95 [2020-12-23 07:08:16,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:16,522 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2020-12-23 07:08:16,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 07:08:16,522 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2020-12-23 07:08:16,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-23 07:08:16,523 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:16,523 INFO L422 BasicCegarLoop]: trace histogram [40, 37, 10, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:16,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-23 07:08:16,724 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:16,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:16,724 INFO L82 PathProgramCache]: Analyzing trace with hash 902498064, now seen corresponding path program 36 times [2020-12-23 07:08:16,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:16,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634056028] [2020-12-23 07:08:16,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:16,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:17,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1655 backedges. 190 proven. 1406 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-12-23 07:08:17,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634056028] [2020-12-23 07:08:17,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918010381] [2020-12-23 07:08:17,567 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 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 [2020-12-23 07:08:17,632 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-12-23 07:08:17,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:17,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 07:08:17,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:18,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1655 backedges. 194 proven. 55 refuted. 0 times theorem prover too weak. 1406 trivial. 0 not checked. [2020-12-23 07:08:18,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:18,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 15] total 53 [2020-12-23 07:08:18,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410130544] [2020-12-23 07:08:18,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-23 07:08:18,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:18,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-23 07:08:18,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=884, Invalid=1872, Unknown=0, NotChecked=0, Total=2756 [2020-12-23 07:08:18,098 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand 53 states. [2020-12-23 07:08:19,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:19,649 INFO L93 Difference]: Finished difference Result 135 states and 151 transitions. [2020-12-23 07:08:19,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-23 07:08:19,650 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 97 [2020-12-23 07:08:19,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:19,651 INFO L225 Difference]: With dead ends: 135 [2020-12-23 07:08:19,652 INFO L226 Difference]: Without dead ends: 113 [2020-12-23 07:08:19,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1314 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2784, Invalid=5406, Unknown=0, NotChecked=0, Total=8190 [2020-12-23 07:08:19,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-12-23 07:08:19,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 101. [2020-12-23 07:08:19,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-12-23 07:08:19,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2020-12-23 07:08:19,660 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 97 [2020-12-23 07:08:19,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:19,661 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2020-12-23 07:08:19,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-23 07:08:19,661 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2020-12-23 07:08:19,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-23 07:08:19,662 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:19,662 INFO L422 BasicCegarLoop]: trace histogram [41, 38, 11, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:19,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-12-23 07:08:19,872 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:19,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:19,872 INFO L82 PathProgramCache]: Analyzing trace with hash -955024129, now seen corresponding path program 37 times [2020-12-23 07:08:19,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:19,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209519589] [2020-12-23 07:08:19,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:19,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:20,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1747 backedges. 195 proven. 1482 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-23 07:08:20,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209519589] [2020-12-23 07:08:20,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286994552] [2020-12-23 07:08:20,906 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 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 [2020-12-23 07:08:20,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:20,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-23 07:08:20,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:21,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1747 backedges. 195 proven. 1482 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-23 07:08:21,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:21,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-12-23 07:08:21,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167110006] [2020-12-23 07:08:21,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-23 07:08:21,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:21,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-23 07:08:21,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 07:08:21,135 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand 42 states. [2020-12-23 07:08:21,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:21,363 INFO L93 Difference]: Finished difference Result 126 states and 135 transitions. [2020-12-23 07:08:21,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-23 07:08:21,364 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 100 [2020-12-23 07:08:21,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:21,365 INFO L225 Difference]: With dead ends: 126 [2020-12-23 07:08:21,365 INFO L226 Difference]: Without dead ends: 103 [2020-12-23 07:08:21,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 07:08:21,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-12-23 07:08:21,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2020-12-23 07:08:21,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-12-23 07:08:21,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2020-12-23 07:08:21,372 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 100 [2020-12-23 07:08:21,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:21,373 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2020-12-23 07:08:21,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-23 07:08:21,373 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2020-12-23 07:08:21,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-12-23 07:08:21,373 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:21,374 INFO L422 BasicCegarLoop]: trace histogram [42, 39, 11, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:21,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:21,586 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:21,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:21,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1035200286, now seen corresponding path program 38 times [2020-12-23 07:08:21,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:21,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165727428] [2020-12-23 07:08:21,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:21,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:22,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 200 proven. 1560 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-23 07:08:22,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165727428] [2020-12-23 07:08:22,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628265203] [2020-12-23 07:08:22,638 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 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 [2020-12-23 07:08:22,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:08:22,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:22,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-23 07:08:22,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:22,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 200 proven. 1560 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-23 07:08:22,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:22,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-12-23 07:08:22,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929920783] [2020-12-23 07:08:22,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-23 07:08:22,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:22,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-23 07:08:22,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 07:08:22,879 INFO L87 Difference]: Start difference. First operand 103 states and 107 transitions. Second operand 43 states. [2020-12-23 07:08:23,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:23,031 INFO L93 Difference]: Finished difference Result 128 states and 137 transitions. [2020-12-23 07:08:23,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-23 07:08:23,032 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 102 [2020-12-23 07:08:23,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:23,033 INFO L225 Difference]: With dead ends: 128 [2020-12-23 07:08:23,033 INFO L226 Difference]: Without dead ends: 105 [2020-12-23 07:08:23,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 07:08:23,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-12-23 07:08:23,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2020-12-23 07:08:23,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-12-23 07:08:23,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2020-12-23 07:08:23,042 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 102 [2020-12-23 07:08:23,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:23,044 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2020-12-23 07:08:23,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-23 07:08:23,044 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2020-12-23 07:08:23,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-23 07:08:23,045 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:23,045 INFO L422 BasicCegarLoop]: trace histogram [43, 40, 11, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:23,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:23,259 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:23,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:23,260 INFO L82 PathProgramCache]: Analyzing trace with hash -775075835, now seen corresponding path program 39 times [2020-12-23 07:08:23,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:23,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355421289] [2020-12-23 07:08:23,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:23,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:24,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1915 backedges. 205 proven. 1640 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-23 07:08:24,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355421289] [2020-12-23 07:08:24,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288422503] [2020-12-23 07:08:24,374 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 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 [2020-12-23 07:08:24,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-23 07:08:24,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:24,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 07:08:24,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:25,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1915 backedges. 209 proven. 66 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2020-12-23 07:08:25,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:25,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 16] total 57 [2020-12-23 07:08:25,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794969218] [2020-12-23 07:08:25,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-12-23 07:08:25,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:25,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-12-23 07:08:25,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1022, Invalid=2170, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 07:08:25,067 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand 57 states. [2020-12-23 07:08:27,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:27,034 INFO L93 Difference]: Finished difference Result 143 states and 159 transitions. [2020-12-23 07:08:27,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-12-23 07:08:27,035 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 104 [2020-12-23 07:08:27,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:27,036 INFO L225 Difference]: With dead ends: 143 [2020-12-23 07:08:27,037 INFO L226 Difference]: Without dead ends: 120 [2020-12-23 07:08:27,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1522 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3236, Invalid=6270, Unknown=0, NotChecked=0, Total=9506 [2020-12-23 07:08:27,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-12-23 07:08:27,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 108. [2020-12-23 07:08:27,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-12-23 07:08:27,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2020-12-23 07:08:27,044 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 104 [2020-12-23 07:08:27,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:27,044 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2020-12-23 07:08:27,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-12-23 07:08:27,045 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2020-12-23 07:08:27,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-12-23 07:08:27,045 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:27,045 INFO L422 BasicCegarLoop]: trace histogram [44, 41, 12, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:27,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:27,246 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:27,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:27,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1304331260, now seen corresponding path program 40 times [2020-12-23 07:08:27,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:27,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132971257] [2020-12-23 07:08:27,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:27,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:28,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2014 backedges. 210 proven. 1722 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-12-23 07:08:28,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132971257] [2020-12-23 07:08:28,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105043139] [2020-12-23 07:08:28,428 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 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 [2020-12-23 07:08:28,519 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:08:28,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:28,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-23 07:08:28,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:28,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2014 backedges. 210 proven. 1722 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-12-23 07:08:28,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:28,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2020-12-23 07:08:28,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070112369] [2020-12-23 07:08:28,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-23 07:08:28,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:28,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-23 07:08:28,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 07:08:28,644 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand 45 states. [2020-12-23 07:08:28,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:28,799 INFO L93 Difference]: Finished difference Result 134 states and 143 transitions. [2020-12-23 07:08:28,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-23 07:08:28,799 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 107 [2020-12-23 07:08:28,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:28,800 INFO L225 Difference]: With dead ends: 134 [2020-12-23 07:08:28,800 INFO L226 Difference]: Without dead ends: 110 [2020-12-23 07:08:28,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 07:08:28,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-23 07:08:28,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2020-12-23 07:08:28,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-12-23 07:08:28,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2020-12-23 07:08:28,808 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 107 [2020-12-23 07:08:28,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:28,808 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2020-12-23 07:08:28,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-23 07:08:28,808 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2020-12-23 07:08:28,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-23 07:08:28,809 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:28,809 INFO L422 BasicCegarLoop]: trace histogram [45, 42, 12, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:29,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-23 07:08:29,023 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:29,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:29,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1696642367, now seen corresponding path program 41 times [2020-12-23 07:08:29,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:29,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629584044] [2020-12-23 07:08:29,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:29,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:30,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2103 backedges. 215 proven. 1806 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-12-23 07:08:30,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629584044] [2020-12-23 07:08:30,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746117981] [2020-12-23 07:08:30,281 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 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 [2020-12-23 07:08:30,389 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2020-12-23 07:08:30,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:30,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-23 07:08:30,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:30,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2103 backedges. 215 proven. 1806 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-12-23 07:08:30,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:30,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2020-12-23 07:08:30,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631949691] [2020-12-23 07:08:30,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-23 07:08:30,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:30,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-23 07:08:30,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 07:08:30,513 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand 46 states. [2020-12-23 07:08:30,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:30,675 INFO L93 Difference]: Finished difference Result 136 states and 145 transitions. [2020-12-23 07:08:30,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-23 07:08:30,676 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 109 [2020-12-23 07:08:30,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:30,677 INFO L225 Difference]: With dead ends: 136 [2020-12-23 07:08:30,677 INFO L226 Difference]: Without dead ends: 112 [2020-12-23 07:08:30,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 07:08:30,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-12-23 07:08:30,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2020-12-23 07:08:30,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-12-23 07:08:30,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2020-12-23 07:08:30,685 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 109 [2020-12-23 07:08:30,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:30,686 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2020-12-23 07:08:30,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-23 07:08:30,686 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2020-12-23 07:08:30,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-23 07:08:30,686 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:30,687 INFO L422 BasicCegarLoop]: trace histogram [46, 43, 12, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:30,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:30,900 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:30,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:30,900 INFO L82 PathProgramCache]: Analyzing trace with hash -750494146, now seen corresponding path program 42 times [2020-12-23 07:08:30,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:30,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876557982] [2020-12-23 07:08:30,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:30,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:32,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2194 backedges. 220 proven. 1892 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-12-23 07:08:32,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876557982] [2020-12-23 07:08:32,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101981714] [2020-12-23 07:08:32,304 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 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 [2020-12-23 07:08:32,375 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-23 07:08:32,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:32,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 07:08:32,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:33,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2194 backedges. 224 proven. 78 refuted. 0 times theorem prover too weak. 1892 trivial. 0 not checked. [2020-12-23 07:08:33,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:33,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 17] total 61 [2020-12-23 07:08:33,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903779020] [2020-12-23 07:08:33,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-12-23 07:08:33,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:33,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-12-23 07:08:33,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1170, Invalid=2490, Unknown=0, NotChecked=0, Total=3660 [2020-12-23 07:08:33,095 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand 61 states. [2020-12-23 07:08:35,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:35,418 INFO L93 Difference]: Finished difference Result 151 states and 167 transitions. [2020-12-23 07:08:35,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-12-23 07:08:35,419 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 111 [2020-12-23 07:08:35,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:35,420 INFO L225 Difference]: With dead ends: 151 [2020-12-23 07:08:35,421 INFO L226 Difference]: Without dead ends: 127 [2020-12-23 07:08:35,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1745 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3722, Invalid=7198, Unknown=0, NotChecked=0, Total=10920 [2020-12-23 07:08:35,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-12-23 07:08:35,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 115. [2020-12-23 07:08:35,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-12-23 07:08:35,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 119 transitions. [2020-12-23 07:08:35,431 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 119 transitions. Word has length 111 [2020-12-23 07:08:35,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:35,431 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 119 transitions. [2020-12-23 07:08:35,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-12-23 07:08:35,431 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 119 transitions. [2020-12-23 07:08:35,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-23 07:08:35,432 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:35,432 INFO L422 BasicCegarLoop]: trace histogram [47, 44, 13, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:35,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:35,648 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:35,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:35,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1337438801, now seen corresponding path program 43 times [2020-12-23 07:08:35,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:35,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998686945] [2020-12-23 07:08:35,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:35,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:37,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2300 backedges. 225 proven. 1980 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-12-23 07:08:37,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998686945] [2020-12-23 07:08:37,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084903707] [2020-12-23 07:08:37,034 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 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 [2020-12-23 07:08:37,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:37,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-23 07:08:37,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:37,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2300 backedges. 225 proven. 1980 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-12-23 07:08:37,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:37,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2020-12-23 07:08:37,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443156494] [2020-12-23 07:08:37,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-23 07:08:37,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:37,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-23 07:08:37,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 07:08:37,277 INFO L87 Difference]: Start difference. First operand 115 states and 119 transitions. Second operand 48 states. [2020-12-23 07:08:37,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:37,557 INFO L93 Difference]: Finished difference Result 142 states and 151 transitions. [2020-12-23 07:08:37,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-23 07:08:37,558 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 114 [2020-12-23 07:08:37,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:37,559 INFO L225 Difference]: With dead ends: 142 [2020-12-23 07:08:37,560 INFO L226 Difference]: Without dead ends: 117 [2020-12-23 07:08:37,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 07:08:37,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-12-23 07:08:37,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2020-12-23 07:08:37,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-12-23 07:08:37,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 121 transitions. [2020-12-23 07:08:37,568 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 121 transitions. Word has length 114 [2020-12-23 07:08:37,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:37,569 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 121 transitions. [2020-12-23 07:08:37,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-23 07:08:37,569 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 121 transitions. [2020-12-23 07:08:37,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-23 07:08:37,569 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:37,570 INFO L422 BasicCegarLoop]: trace histogram [48, 45, 13, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:37,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-12-23 07:08:37,782 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:37,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:37,782 INFO L82 PathProgramCache]: Analyzing trace with hash -808172300, now seen corresponding path program 44 times [2020-12-23 07:08:37,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:37,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203267337] [2020-12-23 07:08:37,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:37,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:39,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2395 backedges. 230 proven. 2070 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-12-23 07:08:39,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203267337] [2020-12-23 07:08:39,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568360458] [2020-12-23 07:08:39,252 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 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 [2020-12-23 07:08:39,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:08:39,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:39,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-23 07:08:39,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:39,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2395 backedges. 230 proven. 2070 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-12-23 07:08:39,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:39,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2020-12-23 07:08:39,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191793348] [2020-12-23 07:08:39,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-23 07:08:39,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:39,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-23 07:08:39,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 07:08:39,501 INFO L87 Difference]: Start difference. First operand 117 states and 121 transitions. Second operand 49 states. [2020-12-23 07:08:39,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:39,734 INFO L93 Difference]: Finished difference Result 144 states and 153 transitions. [2020-12-23 07:08:39,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-23 07:08:39,735 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 116 [2020-12-23 07:08:39,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:39,736 INFO L225 Difference]: With dead ends: 144 [2020-12-23 07:08:39,736 INFO L226 Difference]: Without dead ends: 119 [2020-12-23 07:08:39,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 07:08:39,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-12-23 07:08:39,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2020-12-23 07:08:39,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-12-23 07:08:39,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 123 transitions. [2020-12-23 07:08:39,746 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 123 transitions. Word has length 116 [2020-12-23 07:08:39,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:39,746 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 123 transitions. [2020-12-23 07:08:39,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-23 07:08:39,747 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 123 transitions. [2020-12-23 07:08:39,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-12-23 07:08:39,748 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:39,748 INFO L422 BasicCegarLoop]: trace histogram [49, 46, 13, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:39,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-23 07:08:39,963 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:39,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:39,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1156138281, now seen corresponding path program 45 times [2020-12-23 07:08:39,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:39,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379239229] [2020-12-23 07:08:39,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:39,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:41,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2492 backedges. 235 proven. 2162 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-12-23 07:08:41,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379239229] [2020-12-23 07:08:41,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298631639] [2020-12-23 07:08:41,521 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 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 [2020-12-23 07:08:41,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-23 07:08:41,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:41,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 07:08:41,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:42,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2492 backedges. 239 proven. 91 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2020-12-23 07:08:42,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:42,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 18] total 65 [2020-12-23 07:08:42,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981496733] [2020-12-23 07:08:42,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-12-23 07:08:42,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:42,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-12-23 07:08:42,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=2832, Unknown=0, NotChecked=0, Total=4160 [2020-12-23 07:08:42,419 INFO L87 Difference]: Start difference. First operand 119 states and 123 transitions. Second operand 65 states. [2020-12-23 07:08:44,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:44,778 INFO L93 Difference]: Finished difference Result 159 states and 175 transitions. [2020-12-23 07:08:44,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-12-23 07:08:44,779 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 118 [2020-12-23 07:08:44,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:44,780 INFO L225 Difference]: With dead ends: 159 [2020-12-23 07:08:44,780 INFO L226 Difference]: Without dead ends: 134 [2020-12-23 07:08:44,781 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1983 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=4242, Invalid=8190, Unknown=0, NotChecked=0, Total=12432 [2020-12-23 07:08:44,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-12-23 07:08:44,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 122. [2020-12-23 07:08:44,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-12-23 07:08:44,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 126 transitions. [2020-12-23 07:08:44,799 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 126 transitions. Word has length 118 [2020-12-23 07:08:44,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:44,799 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 126 transitions. [2020-12-23 07:08:44,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-12-23 07:08:44,799 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 126 transitions. [2020-12-23 07:08:44,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-12-23 07:08:44,800 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:44,800 INFO L422 BasicCegarLoop]: trace histogram [50, 47, 14, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:45,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-23 07:08:45,014 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:45,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:45,015 INFO L82 PathProgramCache]: Analyzing trace with hash 317629618, now seen corresponding path program 46 times [2020-12-23 07:08:45,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:45,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542612958] [2020-12-23 07:08:45,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:45,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:46,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2605 backedges. 240 proven. 2256 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2020-12-23 07:08:46,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542612958] [2020-12-23 07:08:46,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845361495] [2020-12-23 07:08:46,709 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 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 [2020-12-23 07:08:46,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:08:46,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:46,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-23 07:08:46,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:46,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2605 backedges. 240 proven. 2256 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2020-12-23 07:08:46,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:46,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2020-12-23 07:08:46,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537712274] [2020-12-23 07:08:46,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-23 07:08:46,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:46,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-23 07:08:46,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-12-23 07:08:46,972 INFO L87 Difference]: Start difference. First operand 122 states and 126 transitions. Second operand 51 states. [2020-12-23 07:08:47,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:47,230 INFO L93 Difference]: Finished difference Result 150 states and 159 transitions. [2020-12-23 07:08:47,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-23 07:08:47,232 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 121 [2020-12-23 07:08:47,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:47,233 INFO L225 Difference]: With dead ends: 150 [2020-12-23 07:08:47,233 INFO L226 Difference]: Without dead ends: 124 [2020-12-23 07:08:47,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-12-23 07:08:47,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-12-23 07:08:47,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2020-12-23 07:08:47,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-12-23 07:08:47,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 128 transitions. [2020-12-23 07:08:47,242 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 128 transitions. Word has length 121 [2020-12-23 07:08:47,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:47,242 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 128 transitions. [2020-12-23 07:08:47,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-23 07:08:47,243 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 128 transitions. [2020-12-23 07:08:47,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-12-23 07:08:47,243 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:47,243 INFO L422 BasicCegarLoop]: trace histogram [51, 48, 14, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:47,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:47,458 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:47,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:47,459 INFO L82 PathProgramCache]: Analyzing trace with hash 189359279, now seen corresponding path program 47 times [2020-12-23 07:08:47,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:47,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182164399] [2020-12-23 07:08:47,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:47,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:49,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2706 backedges. 245 proven. 2352 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2020-12-23 07:08:49,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182164399] [2020-12-23 07:08:49,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886058343] [2020-12-23 07:08:49,210 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 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 [2020-12-23 07:08:49,339 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2020-12-23 07:08:49,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:49,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-23 07:08:49,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:49,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2706 backedges. 245 proven. 2352 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2020-12-23 07:08:49,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:49,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2020-12-23 07:08:49,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455983242] [2020-12-23 07:08:49,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-23 07:08:49,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:49,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-23 07:08:49,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 07:08:49,514 INFO L87 Difference]: Start difference. First operand 124 states and 128 transitions. Second operand 52 states. [2020-12-23 07:08:49,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:49,827 INFO L93 Difference]: Finished difference Result 152 states and 161 transitions. [2020-12-23 07:08:49,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-12-23 07:08:49,828 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 123 [2020-12-23 07:08:49,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:49,829 INFO L225 Difference]: With dead ends: 152 [2020-12-23 07:08:49,829 INFO L226 Difference]: Without dead ends: 126 [2020-12-23 07:08:49,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 07:08:49,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-23 07:08:49,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2020-12-23 07:08:49,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-12-23 07:08:49,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 130 transitions. [2020-12-23 07:08:49,842 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 130 transitions. Word has length 123 [2020-12-23 07:08:49,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:49,843 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 130 transitions. [2020-12-23 07:08:49,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-23 07:08:49,843 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 130 transitions. [2020-12-23 07:08:49,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-12-23 07:08:49,844 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:49,844 INFO L422 BasicCegarLoop]: trace histogram [52, 49, 14, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:50,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:50,057 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:50,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:50,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1475615084, now seen corresponding path program 48 times [2020-12-23 07:08:50,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:50,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675688612] [2020-12-23 07:08:50,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:50,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:51,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 250 proven. 2450 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2020-12-23 07:08:51,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675688612] [2020-12-23 07:08:51,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837435041] [2020-12-23 07:08:51,895 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 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 [2020-12-23 07:08:51,978 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-12-23 07:08:51,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:51,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 07:08:51,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:52,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 254 proven. 105 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2020-12-23 07:08:52,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:52,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 19] total 69 [2020-12-23 07:08:52,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310846207] [2020-12-23 07:08:52,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-12-23 07:08:52,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:52,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-12-23 07:08:52,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1496, Invalid=3196, Unknown=0, NotChecked=0, Total=4692 [2020-12-23 07:08:52,919 INFO L87 Difference]: Start difference. First operand 126 states and 130 transitions. Second operand 69 states. [2020-12-23 07:08:55,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:55,840 INFO L93 Difference]: Finished difference Result 167 states and 183 transitions. [2020-12-23 07:08:55,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-12-23 07:08:55,841 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 125 [2020-12-23 07:08:55,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:55,842 INFO L225 Difference]: With dead ends: 167 [2020-12-23 07:08:55,842 INFO L226 Difference]: Without dead ends: 141 [2020-12-23 07:08:55,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2236 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=4796, Invalid=9246, Unknown=0, NotChecked=0, Total=14042 [2020-12-23 07:08:55,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-12-23 07:08:55,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 129. [2020-12-23 07:08:55,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-12-23 07:08:55,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 133 transitions. [2020-12-23 07:08:55,852 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 133 transitions. Word has length 125 [2020-12-23 07:08:55,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:55,852 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 133 transitions. [2020-12-23 07:08:55,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-12-23 07:08:55,852 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 133 transitions. [2020-12-23 07:08:55,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-12-23 07:08:55,853 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:55,853 INFO L422 BasicCegarLoop]: trace histogram [53, 50, 15, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:56,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-12-23 07:08:56,058 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:56,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:56,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1944531875, now seen corresponding path program 49 times [2020-12-23 07:08:56,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:56,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241620939] [2020-12-23 07:08:56,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:56,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:57,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2929 backedges. 255 proven. 2550 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2020-12-23 07:08:57,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241620939] [2020-12-23 07:08:57,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047930728] [2020-12-23 07:08:57,943 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 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 [2020-12-23 07:08:58,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:58,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-23 07:08:58,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:58,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2929 backedges. 255 proven. 2550 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2020-12-23 07:08:58,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:58,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2020-12-23 07:08:58,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833248366] [2020-12-23 07:08:58,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-23 07:08:58,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:58,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-23 07:08:58,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 07:08:58,222 INFO L87 Difference]: Start difference. First operand 129 states and 133 transitions. Second operand 54 states. [2020-12-23 07:08:58,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:58,508 INFO L93 Difference]: Finished difference Result 158 states and 167 transitions. [2020-12-23 07:08:58,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-23 07:08:58,508 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 128 [2020-12-23 07:08:58,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:58,510 INFO L225 Difference]: With dead ends: 158 [2020-12-23 07:08:58,510 INFO L226 Difference]: Without dead ends: 131 [2020-12-23 07:08:58,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 07:08:58,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-12-23 07:08:58,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2020-12-23 07:08:58,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-12-23 07:08:58,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 135 transitions. [2020-12-23 07:08:58,521 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 135 transitions. Word has length 128 [2020-12-23 07:08:58,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:58,522 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 135 transitions. [2020-12-23 07:08:58,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-23 07:08:58,522 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 135 transitions. [2020-12-23 07:08:58,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-23 07:08:58,523 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:58,523 INFO L422 BasicCegarLoop]: trace histogram [54, 51, 15, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:58,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:58,737 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:58,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:58,738 INFO L82 PathProgramCache]: Analyzing trace with hash -330240762, now seen corresponding path program 50 times [2020-12-23 07:08:58,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:58,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735956851] [2020-12-23 07:08:58,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:58,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:00,723 INFO L134 CoverageAnalysis]: Checked inductivity of 3036 backedges. 260 proven. 2652 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2020-12-23 07:09:00,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735956851] [2020-12-23 07:09:00,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731528299] [2020-12-23 07:09:00,724 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 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 [2020-12-23 07:09:00,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:09:00,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:00,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-23 07:09:00,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:01,029 INFO L134 CoverageAnalysis]: Checked inductivity of 3036 backedges. 260 proven. 2652 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2020-12-23 07:09:01,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:01,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2020-12-23 07:09:01,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803420383] [2020-12-23 07:09:01,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-23 07:09:01,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:01,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-23 07:09:01,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 07:09:01,031 INFO L87 Difference]: Start difference. First operand 131 states and 135 transitions. Second operand 55 states. [2020-12-23 07:09:01,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:01,378 INFO L93 Difference]: Finished difference Result 160 states and 169 transitions. [2020-12-23 07:09:01,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-23 07:09:01,379 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 130 [2020-12-23 07:09:01,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:01,380 INFO L225 Difference]: With dead ends: 160 [2020-12-23 07:09:01,380 INFO L226 Difference]: Without dead ends: 133 [2020-12-23 07:09:01,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 07:09:01,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-12-23 07:09:01,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2020-12-23 07:09:01,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-12-23 07:09:01,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 137 transitions. [2020-12-23 07:09:01,391 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 137 transitions. Word has length 130 [2020-12-23 07:09:01,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:01,391 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 137 transitions. [2020-12-23 07:09:01,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-23 07:09:01,391 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 137 transitions. [2020-12-23 07:09:01,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-23 07:09:01,392 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:01,392 INFO L422 BasicCegarLoop]: trace histogram [55, 52, 15, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:01,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-12-23 07:09:01,608 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:01,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:01,608 INFO L82 PathProgramCache]: Analyzing trace with hash -248391255, now seen corresponding path program 51 times [2020-12-23 07:09:01,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:01,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693780337] [2020-12-23 07:09:01,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:01,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:03,704 INFO L134 CoverageAnalysis]: Checked inductivity of 3145 backedges. 265 proven. 2756 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2020-12-23 07:09:03,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693780337] [2020-12-23 07:09:03,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578830489] [2020-12-23 07:09:03,705 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 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 [2020-12-23 07:09:03,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-23 07:09:03,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:03,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 07:09:03,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:04,243 INFO L134 CoverageAnalysis]: Checked inductivity of 3145 backedges. 364 proven. 9 refuted. 0 times theorem prover too weak. 2772 trivial. 0 not checked. [2020-12-23 07:09:04,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:04,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 6] total 59 [2020-12-23 07:09:04,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958424179] [2020-12-23 07:09:04,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-12-23 07:09:04,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:04,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-12-23 07:09:04,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-12-23 07:09:04,246 INFO L87 Difference]: Start difference. First operand 133 states and 137 transitions. Second operand 59 states. [2020-12-23 07:09:04,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:04,632 INFO L93 Difference]: Finished difference Result 165 states and 177 transitions. [2020-12-23 07:09:04,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-12-23 07:09:04,633 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 132 [2020-12-23 07:09:04,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:04,635 INFO L225 Difference]: With dead ends: 165 [2020-12-23 07:09:04,635 INFO L226 Difference]: Without dead ends: 138 [2020-12-23 07:09:04,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-12-23 07:09:04,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-12-23 07:09:04,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2020-12-23 07:09:04,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-12-23 07:09:04,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 142 transitions. [2020-12-23 07:09:04,648 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 142 transitions. Word has length 132 [2020-12-23 07:09:04,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:04,648 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 142 transitions. [2020-12-23 07:09:04,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-12-23 07:09:04,648 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 142 transitions. [2020-12-23 07:09:04,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-23 07:09:04,649 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:04,649 INFO L422 BasicCegarLoop]: trace histogram [57, 53, 15, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:04,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-12-23 07:09:04,864 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:04,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:04,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1336946225, now seen corresponding path program 52 times [2020-12-23 07:09:04,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:04,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200710739] [2020-12-23 07:09:04,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:04,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:07,041 INFO L134 CoverageAnalysis]: Checked inductivity of 3369 backedges. 378 proven. 2862 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2020-12-23 07:09:07,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200710739] [2020-12-23 07:09:07,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445264434] [2020-12-23 07:09:07,041 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 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 [2020-12-23 07:09:07,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:09:07,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:07,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 55 conjunts are in the unsatisfiable core [2020-12-23 07:09:07,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:07,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3369 backedges. 378 proven. 2862 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2020-12-23 07:09:07,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:07,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 57 [2020-12-23 07:09:07,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103399594] [2020-12-23 07:09:07,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-12-23 07:09:07,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:07,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-12-23 07:09:07,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 07:09:07,330 INFO L87 Difference]: Start difference. First operand 137 states and 142 transitions. Second operand 57 states. [2020-12-23 07:09:07,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:07,638 INFO L93 Difference]: Finished difference Result 168 states and 179 transitions. [2020-12-23 07:09:07,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-12-23 07:09:07,639 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 136 [2020-12-23 07:09:07,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:07,641 INFO L225 Difference]: With dead ends: 168 [2020-12-23 07:09:07,641 INFO L226 Difference]: Without dead ends: 139 [2020-12-23 07:09:07,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 07:09:07,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-12-23 07:09:07,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2020-12-23 07:09:07,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-12-23 07:09:07,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 144 transitions. [2020-12-23 07:09:07,659 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 144 transitions. Word has length 136 [2020-12-23 07:09:07,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:07,659 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 144 transitions. [2020-12-23 07:09:07,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-12-23 07:09:07,660 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 144 transitions. [2020-12-23 07:09:07,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-23 07:09:07,660 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:07,661 INFO L422 BasicCegarLoop]: trace histogram [58, 54, 15, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:07,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-12-23 07:09:07,875 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:07,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:07,876 INFO L82 PathProgramCache]: Analyzing trace with hash 432526484, now seen corresponding path program 53 times [2020-12-23 07:09:07,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:07,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109763416] [2020-12-23 07:09:07,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:07,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:09,994 INFO L134 CoverageAnalysis]: Checked inductivity of 3484 backedges. 385 proven. 2970 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2020-12-23 07:09:09,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109763416] [2020-12-23 07:09:09,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684180130] [2020-12-23 07:09:09,995 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:10,129 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 59 check-sat command(s) [2020-12-23 07:09:10,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:10,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 56 conjunts are in the unsatisfiable core [2020-12-23 07:09:10,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:10,302 INFO L134 CoverageAnalysis]: Checked inductivity of 3484 backedges. 385 proven. 2970 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2020-12-23 07:09:10,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:10,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 58 [2020-12-23 07:09:10,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812912007] [2020-12-23 07:09:10,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-12-23 07:09:10,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:10,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-12-23 07:09:10,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-12-23 07:09:10,304 INFO L87 Difference]: Start difference. First operand 139 states and 144 transitions. Second operand 58 states. [2020-12-23 07:09:10,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:10,596 INFO L93 Difference]: Finished difference Result 170 states and 181 transitions. [2020-12-23 07:09:10,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-12-23 07:09:10,597 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 138 [2020-12-23 07:09:10,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:10,598 INFO L225 Difference]: With dead ends: 170 [2020-12-23 07:09:10,598 INFO L226 Difference]: Without dead ends: 141 [2020-12-23 07:09:10,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-12-23 07:09:10,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-12-23 07:09:10,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2020-12-23 07:09:10,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-12-23 07:09:10,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 146 transitions. [2020-12-23 07:09:10,610 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 146 transitions. Word has length 138 [2020-12-23 07:09:10,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:10,610 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 146 transitions. [2020-12-23 07:09:10,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-12-23 07:09:10,610 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 146 transitions. [2020-12-23 07:09:10,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-12-23 07:09:10,611 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:10,611 INFO L422 BasicCegarLoop]: trace histogram [59, 55, 15, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:10,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-12-23 07:09:10,825 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:10,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:10,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1131450825, now seen corresponding path program 54 times [2020-12-23 07:09:10,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:10,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408591902] [2020-12-23 07:09:10,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:10,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:13,048 INFO L134 CoverageAnalysis]: Checked inductivity of 3601 backedges. 392 proven. 3080 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2020-12-23 07:09:13,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408591902] [2020-12-23 07:09:13,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645750142] [2020-12-23 07:09:13,049 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:13,139 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2020-12-23 07:09:13,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:13,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 07:09:13,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:14,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3601 backedges. 401 proven. 120 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2020-12-23 07:09:14,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:14,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 20] total 76 [2020-12-23 07:09:14,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871433379] [2020-12-23 07:09:14,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-12-23 07:09:14,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:14,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-12-23 07:09:14,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1842, Invalid=3858, Unknown=0, NotChecked=0, Total=5700 [2020-12-23 07:09:14,204 INFO L87 Difference]: Start difference. First operand 141 states and 146 transitions. Second operand 76 states. [2020-12-23 07:09:17,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:17,526 INFO L93 Difference]: Finished difference Result 193 states and 215 transitions. [2020-12-23 07:09:17,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-12-23 07:09:17,526 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 140 [2020-12-23 07:09:17,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:17,528 INFO L225 Difference]: With dead ends: 193 [2020-12-23 07:09:17,528 INFO L226 Difference]: Without dead ends: 164 [2020-12-23 07:09:17,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2802 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=5874, Invalid=11418, Unknown=0, NotChecked=0, Total=17292 [2020-12-23 07:09:17,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-12-23 07:09:17,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 144. [2020-12-23 07:09:17,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-12-23 07:09:17,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 149 transitions. [2020-12-23 07:09:17,537 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 149 transitions. Word has length 140 [2020-12-23 07:09:17,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:17,537 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 149 transitions. [2020-12-23 07:09:17,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-12-23 07:09:17,537 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 149 transitions. [2020-12-23 07:09:17,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-12-23 07:09:17,537 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:17,538 INFO L422 BasicCegarLoop]: trace histogram [60, 56, 16, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:17,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:17,739 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:17,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:17,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1356357230, now seen corresponding path program 55 times [2020-12-23 07:09:17,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:17,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182033219] [2020-12-23 07:09:17,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:17,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:19,908 INFO L134 CoverageAnalysis]: Checked inductivity of 3736 backedges. 399 proven. 3192 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-23 07:09:19,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182033219] [2020-12-23 07:09:19,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494788317] [2020-12-23 07:09:19,908 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:20,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:20,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-23 07:09:20,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:20,175 INFO L134 CoverageAnalysis]: Checked inductivity of 3736 backedges. 399 proven. 3192 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-23 07:09:20,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:20,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2020-12-23 07:09:20,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993444230] [2020-12-23 07:09:20,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-12-23 07:09:20,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:20,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-12-23 07:09:20,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 07:09:20,177 INFO L87 Difference]: Start difference. First operand 144 states and 149 transitions. Second operand 60 states. [2020-12-23 07:09:20,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:20,536 INFO L93 Difference]: Finished difference Result 176 states and 187 transitions. [2020-12-23 07:09:20,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-12-23 07:09:20,537 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 143 [2020-12-23 07:09:20,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:20,538 INFO L225 Difference]: With dead ends: 176 [2020-12-23 07:09:20,538 INFO L226 Difference]: Without dead ends: 146 [2020-12-23 07:09:20,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 07:09:20,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-12-23 07:09:20,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2020-12-23 07:09:20,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-12-23 07:09:20,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 151 transitions. [2020-12-23 07:09:20,546 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 151 transitions. Word has length 143 [2020-12-23 07:09:20,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:20,546 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 151 transitions. [2020-12-23 07:09:20,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-12-23 07:09:20,546 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 151 transitions. [2020-12-23 07:09:20,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-12-23 07:09:20,547 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:20,547 INFO L422 BasicCegarLoop]: trace histogram [61, 57, 16, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:20,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-12-23 07:09:20,748 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:20,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:20,749 INFO L82 PathProgramCache]: Analyzing trace with hash -597846577, now seen corresponding path program 56 times [2020-12-23 07:09:20,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:20,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782129273] [2020-12-23 07:09:20,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:20,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:23,049 INFO L134 CoverageAnalysis]: Checked inductivity of 3857 backedges. 406 proven. 3306 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-23 07:09:23,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782129273] [2020-12-23 07:09:23,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294223846] [2020-12-23 07:09:23,050 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:23,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:09:23,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:23,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 59 conjunts are in the unsatisfiable core [2020-12-23 07:09:23,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:23,334 INFO L134 CoverageAnalysis]: Checked inductivity of 3857 backedges. 406 proven. 3306 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-23 07:09:23,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:23,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 61 [2020-12-23 07:09:23,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315119428] [2020-12-23 07:09:23,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-12-23 07:09:23,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:23,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-12-23 07:09:23,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-12-23 07:09:23,336 INFO L87 Difference]: Start difference. First operand 146 states and 151 transitions. Second operand 61 states. [2020-12-23 07:09:23,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:23,588 INFO L93 Difference]: Finished difference Result 178 states and 189 transitions. [2020-12-23 07:09:23,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-12-23 07:09:23,589 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 145 [2020-12-23 07:09:23,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:23,590 INFO L225 Difference]: With dead ends: 178 [2020-12-23 07:09:23,590 INFO L226 Difference]: Without dead ends: 148 [2020-12-23 07:09:23,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-12-23 07:09:23,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-12-23 07:09:23,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2020-12-23 07:09:23,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-12-23 07:09:23,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 153 transitions. [2020-12-23 07:09:23,603 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 153 transitions. Word has length 145 [2020-12-23 07:09:23,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:23,603 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 153 transitions. [2020-12-23 07:09:23,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-12-23 07:09:23,603 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 153 transitions. [2020-12-23 07:09:23,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-12-23 07:09:23,604 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:23,604 INFO L422 BasicCegarLoop]: trace histogram [62, 58, 16, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:23,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:23,814 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:23,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:23,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1813549364, now seen corresponding path program 57 times [2020-12-23 07:09:23,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:23,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088421772] [2020-12-23 07:09:23,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:23,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:26,194 INFO L134 CoverageAnalysis]: Checked inductivity of 3980 backedges. 413 proven. 3422 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-23 07:09:26,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088421772] [2020-12-23 07:09:26,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294613106] [2020-12-23 07:09:26,195 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:26,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-23 07:09:26,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:26,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 07:09:26,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:27,414 INFO L134 CoverageAnalysis]: Checked inductivity of 3980 backedges. 422 proven. 136 refuted. 0 times theorem prover too weak. 3422 trivial. 0 not checked. [2020-12-23 07:09:27,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:27,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 21] total 80 [2020-12-23 07:09:27,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288833500] [2020-12-23 07:09:27,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-12-23 07:09:27,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:27,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-12-23 07:09:27,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2039, Invalid=4281, Unknown=0, NotChecked=0, Total=6320 [2020-12-23 07:09:27,415 INFO L87 Difference]: Start difference. First operand 148 states and 153 transitions. Second operand 80 states. [2020-12-23 07:09:31,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:31,263 INFO L93 Difference]: Finished difference Result 201 states and 223 transitions. [2020-12-23 07:09:31,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-12-23 07:09:31,264 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 147 [2020-12-23 07:09:31,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:31,266 INFO L225 Difference]: With dead ends: 201 [2020-12-23 07:09:31,266 INFO L226 Difference]: Without dead ends: 171 [2020-12-23 07:09:31,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3102 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=6523, Invalid=12659, Unknown=0, NotChecked=0, Total=19182 [2020-12-23 07:09:31,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-12-23 07:09:31,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 151. [2020-12-23 07:09:31,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-12-23 07:09:31,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 156 transitions. [2020-12-23 07:09:31,278 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 156 transitions. Word has length 147 [2020-12-23 07:09:31,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:31,278 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 156 transitions. [2020-12-23 07:09:31,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-12-23 07:09:31,278 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 156 transitions. [2020-12-23 07:09:31,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-12-23 07:09:31,279 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:31,279 INFO L422 BasicCegarLoop]: trace histogram [63, 59, 17, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:31,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2020-12-23 07:09:31,494 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:31,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:31,495 INFO L82 PathProgramCache]: Analyzing trace with hash 2073689603, now seen corresponding path program 58 times [2020-12-23 07:09:31,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:31,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590008597] [2020-12-23 07:09:31,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:31,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:34,058 INFO L134 CoverageAnalysis]: Checked inductivity of 4122 backedges. 420 proven. 3540 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-12-23 07:09:34,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590008597] [2020-12-23 07:09:34,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917222026] [2020-12-23 07:09:34,059 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:34,165 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:09:34,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:34,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 61 conjunts are in the unsatisfiable core [2020-12-23 07:09:34,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:34,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4122 backedges. 420 proven. 3540 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-12-23 07:09:34,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:34,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 63 [2020-12-23 07:09:34,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784949012] [2020-12-23 07:09:34,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-12-23 07:09:34,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:34,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-12-23 07:09:34,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-12-23 07:09:34,347 INFO L87 Difference]: Start difference. First operand 151 states and 156 transitions. Second operand 63 states. [2020-12-23 07:09:34,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:34,691 INFO L93 Difference]: Finished difference Result 184 states and 195 transitions. [2020-12-23 07:09:34,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-12-23 07:09:34,692 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 150 [2020-12-23 07:09:34,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:34,693 INFO L225 Difference]: With dead ends: 184 [2020-12-23 07:09:34,693 INFO L226 Difference]: Without dead ends: 153 [2020-12-23 07:09:34,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-12-23 07:09:34,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-12-23 07:09:34,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2020-12-23 07:09:34,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-12-23 07:09:34,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 158 transitions. [2020-12-23 07:09:34,703 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 158 transitions. Word has length 150 [2020-12-23 07:09:34,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:34,703 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 158 transitions. [2020-12-23 07:09:34,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-12-23 07:09:34,703 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 158 transitions. [2020-12-23 07:09:34,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-12-23 07:09:34,704 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:34,704 INFO L422 BasicCegarLoop]: trace histogram [64, 60, 17, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:34,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:34,905 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:34,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:34,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1479621414, now seen corresponding path program 59 times [2020-12-23 07:09:34,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:34,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525925552] [2020-12-23 07:09:34,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:34,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:37,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4249 backedges. 427 proven. 3660 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-12-23 07:09:37,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525925552] [2020-12-23 07:09:37,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952531660] [2020-12-23 07:09:37,533 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:37,680 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 65 check-sat command(s) [2020-12-23 07:09:37,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:37,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 62 conjunts are in the unsatisfiable core [2020-12-23 07:09:37,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:37,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4249 backedges. 427 proven. 3660 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-12-23 07:09:37,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:37,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 64 [2020-12-23 07:09:37,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818629494] [2020-12-23 07:09:37,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-12-23 07:09:37,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:37,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-12-23 07:09:37,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2020-12-23 07:09:37,868 INFO L87 Difference]: Start difference. First operand 153 states and 158 transitions. Second operand 64 states. [2020-12-23 07:09:38,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:38,139 INFO L93 Difference]: Finished difference Result 186 states and 197 transitions. [2020-12-23 07:09:38,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-12-23 07:09:38,140 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 152 [2020-12-23 07:09:38,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:38,142 INFO L225 Difference]: With dead ends: 186 [2020-12-23 07:09:38,142 INFO L226 Difference]: Without dead ends: 155 [2020-12-23 07:09:38,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2020-12-23 07:09:38,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-12-23 07:09:38,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2020-12-23 07:09:38,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-12-23 07:09:38,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 160 transitions. [2020-12-23 07:09:38,158 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 160 transitions. Word has length 152 [2020-12-23 07:09:38,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:38,158 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 160 transitions. [2020-12-23 07:09:38,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-12-23 07:09:38,158 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 160 transitions. [2020-12-23 07:09:38,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-12-23 07:09:38,159 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:38,159 INFO L422 BasicCegarLoop]: trace histogram [65, 61, 17, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:38,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2020-12-23 07:09:38,368 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:38,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:38,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1810742153, now seen corresponding path program 60 times [2020-12-23 07:09:38,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:38,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911086464] [2020-12-23 07:09:38,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:38,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:40,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4378 backedges. 434 proven. 3782 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-12-23 07:09:40,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911086464] [2020-12-23 07:09:40,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306782670] [2020-12-23 07:09:40,990 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:41,080 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-23 07:09:41,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:41,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 07:09:41,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:41,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4378 backedges. 549 proven. 16 refuted. 0 times theorem prover too weak. 3813 trivial. 0 not checked. [2020-12-23 07:09:41,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:41,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 7] total 69 [2020-12-23 07:09:41,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923620028] [2020-12-23 07:09:41,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-12-23 07:09:41,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:41,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-12-23 07:09:41,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-12-23 07:09:41,665 INFO L87 Difference]: Start difference. First operand 155 states and 160 transitions. Second operand 69 states. [2020-12-23 07:09:42,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:42,125 INFO L93 Difference]: Finished difference Result 191 states and 205 transitions. [2020-12-23 07:09:42,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-12-23 07:09:42,125 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 154 [2020-12-23 07:09:42,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:42,127 INFO L225 Difference]: With dead ends: 191 [2020-12-23 07:09:42,127 INFO L226 Difference]: Without dead ends: 160 [2020-12-23 07:09:42,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-12-23 07:09:42,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-12-23 07:09:42,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 159. [2020-12-23 07:09:42,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-12-23 07:09:42,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 165 transitions. [2020-12-23 07:09:42,135 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 165 transitions. Word has length 154 [2020-12-23 07:09:42,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:42,136 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 165 transitions. [2020-12-23 07:09:42,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-12-23 07:09:42,136 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 165 transitions. [2020-12-23 07:09:42,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-12-23 07:09:42,136 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:42,137 INFO L422 BasicCegarLoop]: trace histogram [67, 62, 17, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:42,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:42,338 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:42,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:42,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1823680879, now seen corresponding path program 61 times [2020-12-23 07:09:42,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:42,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207175032] [2020-12-23 07:09:42,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:42,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:44,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4642 backedges. 567 proven. 3906 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-12-23 07:09:44,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207175032] [2020-12-23 07:09:44,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991221889] [2020-12-23 07:09:44,996 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:45,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:45,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 64 conjunts are in the unsatisfiable core [2020-12-23 07:09:45,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:45,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4642 backedges. 567 proven. 3906 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-12-23 07:09:45,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:45,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2020-12-23 07:09:45,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366308537] [2020-12-23 07:09:45,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-12-23 07:09:45,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:45,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-12-23 07:09:45,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-12-23 07:09:45,280 INFO L87 Difference]: Start difference. First operand 159 states and 165 transitions. Second operand 66 states. [2020-12-23 07:09:45,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:45,696 INFO L93 Difference]: Finished difference Result 194 states and 207 transitions. [2020-12-23 07:09:45,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-12-23 07:09:45,697 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 158 [2020-12-23 07:09:45,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:45,699 INFO L225 Difference]: With dead ends: 194 [2020-12-23 07:09:45,699 INFO L226 Difference]: Without dead ends: 161 [2020-12-23 07:09:45,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-12-23 07:09:45,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-12-23 07:09:45,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2020-12-23 07:09:45,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-12-23 07:09:45,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 167 transitions. [2020-12-23 07:09:45,712 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 167 transitions. Word has length 158 [2020-12-23 07:09:45,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:45,712 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 167 transitions. [2020-12-23 07:09:45,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-12-23 07:09:45,713 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 167 transitions. [2020-12-23 07:09:45,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-23 07:09:45,713 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:45,714 INFO L422 BasicCegarLoop]: trace histogram [68, 63, 17, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:45,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-12-23 07:09:45,927 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:45,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:45,928 INFO L82 PathProgramCache]: Analyzing trace with hash 2092056756, now seen corresponding path program 62 times [2020-12-23 07:09:45,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:45,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54791086] [2020-12-23 07:09:45,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:45,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:48,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4777 backedges. 576 proven. 4032 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-12-23 07:09:48,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54791086] [2020-12-23 07:09:48,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575311891] [2020-12-23 07:09:48,793 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:48,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:09:48,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:48,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 65 conjunts are in the unsatisfiable core [2020-12-23 07:09:48,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:49,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4777 backedges. 576 proven. 4032 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-12-23 07:09:49,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:49,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 67 [2020-12-23 07:09:49,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004389061] [2020-12-23 07:09:49,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-12-23 07:09:49,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:49,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-12-23 07:09:49,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2020-12-23 07:09:49,094 INFO L87 Difference]: Start difference. First operand 161 states and 167 transitions. Second operand 67 states. [2020-12-23 07:09:49,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:49,530 INFO L93 Difference]: Finished difference Result 196 states and 209 transitions. [2020-12-23 07:09:49,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-12-23 07:09:49,531 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 160 [2020-12-23 07:09:49,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:49,532 INFO L225 Difference]: With dead ends: 196 [2020-12-23 07:09:49,532 INFO L226 Difference]: Without dead ends: 163 [2020-12-23 07:09:49,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2020-12-23 07:09:49,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-12-23 07:09:49,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2020-12-23 07:09:49,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-12-23 07:09:49,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 169 transitions. [2020-12-23 07:09:49,546 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 169 transitions. Word has length 160 [2020-12-23 07:09:49,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:49,546 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 169 transitions. [2020-12-23 07:09:49,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-12-23 07:09:49,546 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 169 transitions. [2020-12-23 07:09:49,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-12-23 07:09:49,547 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:49,547 INFO L422 BasicCegarLoop]: trace histogram [69, 64, 17, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:49,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:49,761 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:49,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:49,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1570394601, now seen corresponding path program 63 times [2020-12-23 07:09:49,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:49,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118107102] [2020-12-23 07:09:49,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:49,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:52,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4914 backedges. 585 proven. 4160 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-12-23 07:09:52,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118107102] [2020-12-23 07:09:52,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711277944] [2020-12-23 07:09:52,766 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:52,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-23 07:09:52,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:52,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 07:09:52,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:54,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4914 backedges. 601 proven. 153 refuted. 0 times theorem prover too weak. 4160 trivial. 0 not checked. [2020-12-23 07:09:54,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:54,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 23] total 88 [2020-12-23 07:09:54,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568747293] [2020-12-23 07:09:54,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-12-23 07:09:54,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:54,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-12-23 07:09:54,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2463, Invalid=5193, Unknown=0, NotChecked=0, Total=7656 [2020-12-23 07:09:54,214 INFO L87 Difference]: Start difference. First operand 163 states and 169 transitions. Second operand 88 states. [2020-12-23 07:09:58,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:58,257 INFO L93 Difference]: Finished difference Result 229 states and 258 transitions. [2020-12-23 07:09:58,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2020-12-23 07:09:58,258 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 162 [2020-12-23 07:09:58,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:58,259 INFO L225 Difference]: With dead ends: 229 [2020-12-23 07:09:58,259 INFO L226 Difference]: Without dead ends: 196 [2020-12-23 07:09:58,260 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3834 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=7858, Invalid=15398, Unknown=0, NotChecked=0, Total=23256 [2020-12-23 07:09:58,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-12-23 07:09:58,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 166. [2020-12-23 07:09:58,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-12-23 07:09:58,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 172 transitions. [2020-12-23 07:09:58,273 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 172 transitions. Word has length 162 [2020-12-23 07:09:58,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:58,273 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 172 transitions. [2020-12-23 07:09:58,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-12-23 07:09:58,273 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 172 transitions. [2020-12-23 07:09:58,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-12-23 07:09:58,274 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:58,274 INFO L422 BasicCegarLoop]: trace histogram [70, 65, 18, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:58,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-12-23 07:09:58,488 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:58,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:58,488 INFO L82 PathProgramCache]: Analyzing trace with hash -175115790, now seen corresponding path program 64 times [2020-12-23 07:09:58,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:58,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748337114] [2020-12-23 07:09:58,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:58,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:01,633 INFO L134 CoverageAnalysis]: Checked inductivity of 5071 backedges. 594 proven. 4290 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-12-23 07:10:01,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748337114] [2020-12-23 07:10:01,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515754213] [2020-12-23 07:10:01,633 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:01,747 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:10:01,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:01,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 67 conjunts are in the unsatisfiable core [2020-12-23 07:10:01,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:01,973 INFO L134 CoverageAnalysis]: Checked inductivity of 5071 backedges. 594 proven. 4290 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-12-23 07:10:01,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:01,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 69 [2020-12-23 07:10:01,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874183935] [2020-12-23 07:10:01,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-12-23 07:10:01,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:01,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-12-23 07:10:01,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-12-23 07:10:01,976 INFO L87 Difference]: Start difference. First operand 166 states and 172 transitions. Second operand 69 states. [2020-12-23 07:10:02,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:02,426 INFO L93 Difference]: Finished difference Result 202 states and 215 transitions. [2020-12-23 07:10:02,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-12-23 07:10:02,427 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 165 [2020-12-23 07:10:02,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:02,429 INFO L225 Difference]: With dead ends: 202 [2020-12-23 07:10:02,429 INFO L226 Difference]: Without dead ends: 168 [2020-12-23 07:10:02,430 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-12-23 07:10:02,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-12-23 07:10:02,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2020-12-23 07:10:02,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-12-23 07:10:02,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 174 transitions. [2020-12-23 07:10:02,441 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 174 transitions. Word has length 165 [2020-12-23 07:10:02,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:02,441 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 174 transitions. [2020-12-23 07:10:02,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-12-23 07:10:02,441 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 174 transitions. [2020-12-23 07:10:02,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-12-23 07:10:02,442 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:02,442 INFO L422 BasicCegarLoop]: trace histogram [71, 66, 18, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:02,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-12-23 07:10:02,643 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:02,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:02,644 INFO L82 PathProgramCache]: Analyzing trace with hash 283667055, now seen corresponding path program 65 times [2020-12-23 07:10:02,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:02,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193354947] [2020-12-23 07:10:02,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:02,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:05,941 INFO L134 CoverageAnalysis]: Checked inductivity of 5212 backedges. 603 proven. 4422 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-12-23 07:10:05,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193354947] [2020-12-23 07:10:05,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481242197] [2020-12-23 07:10:05,942 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:06,100 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2020-12-23 07:10:06,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:06,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 68 conjunts are in the unsatisfiable core [2020-12-23 07:10:06,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:06,313 INFO L134 CoverageAnalysis]: Checked inductivity of 5212 backedges. 603 proven. 4422 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-12-23 07:10:06,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:06,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 70 [2020-12-23 07:10:06,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132501164] [2020-12-23 07:10:06,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-12-23 07:10:06,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:06,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-12-23 07:10:06,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2020-12-23 07:10:06,315 INFO L87 Difference]: Start difference. First operand 168 states and 174 transitions. Second operand 70 states. [2020-12-23 07:10:06,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:06,714 INFO L93 Difference]: Finished difference Result 204 states and 217 transitions. [2020-12-23 07:10:06,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-12-23 07:10:06,715 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 167 [2020-12-23 07:10:06,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:06,716 INFO L225 Difference]: With dead ends: 204 [2020-12-23 07:10:06,716 INFO L226 Difference]: Without dead ends: 170 [2020-12-23 07:10:06,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2020-12-23 07:10:06,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-12-23 07:10:06,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2020-12-23 07:10:06,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-12-23 07:10:06,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 176 transitions. [2020-12-23 07:10:06,726 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 176 transitions. Word has length 167 [2020-12-23 07:10:06,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:06,726 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 176 transitions. [2020-12-23 07:10:06,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-12-23 07:10:06,726 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 176 transitions. [2020-12-23 07:10:06,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-12-23 07:10:06,727 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:06,727 INFO L422 BasicCegarLoop]: trace histogram [72, 67, 18, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:06,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-12-23 07:10:06,928 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:06,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:06,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1207650388, now seen corresponding path program 66 times [2020-12-23 07:10:06,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:06,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931204592] [2020-12-23 07:10:06,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:06,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:10,292 INFO L134 CoverageAnalysis]: Checked inductivity of 5355 backedges. 612 proven. 4556 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-12-23 07:10:10,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931204592] [2020-12-23 07:10:10,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354274747] [2020-12-23 07:10:10,292 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:10,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-23 07:10:10,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:10,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 07:10:10,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:11,790 INFO L134 CoverageAnalysis]: Checked inductivity of 5355 backedges. 628 proven. 171 refuted. 0 times theorem prover too weak. 4556 trivial. 0 not checked. [2020-12-23 07:10:11,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:11,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 24] total 92 [2020-12-23 07:10:11,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963857444] [2020-12-23 07:10:11,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 92 states [2020-12-23 07:10:11,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:11,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2020-12-23 07:10:11,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2690, Invalid=5682, Unknown=0, NotChecked=0, Total=8372 [2020-12-23 07:10:11,792 INFO L87 Difference]: Start difference. First operand 170 states and 176 transitions. Second operand 92 states. [2020-12-23 07:10:16,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:16,986 INFO L93 Difference]: Finished difference Result 237 states and 266 transitions. [2020-12-23 07:10:16,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2020-12-23 07:10:16,987 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 169 [2020-12-23 07:10:16,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:16,989 INFO L225 Difference]: With dead ends: 237 [2020-12-23 07:10:16,989 INFO L226 Difference]: Without dead ends: 203 [2020-12-23 07:10:16,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4184 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=8606, Invalid=16834, Unknown=0, NotChecked=0, Total=25440 [2020-12-23 07:10:16,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-12-23 07:10:16,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 173. [2020-12-23 07:10:16,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-12-23 07:10:16,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 179 transitions. [2020-12-23 07:10:16,999 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 179 transitions. Word has length 169 [2020-12-23 07:10:16,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:16,999 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 179 transitions. [2020-12-23 07:10:16,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 92 states. [2020-12-23 07:10:16,999 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 179 transitions. [2020-12-23 07:10:16,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-12-23 07:10:16,999 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:16,999 INFO L422 BasicCegarLoop]: trace histogram [73, 68, 19, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:17,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:17,200 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:17,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:17,201 INFO L82 PathProgramCache]: Analyzing trace with hash 522974435, now seen corresponding path program 67 times [2020-12-23 07:10:17,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:17,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560169986] [2020-12-23 07:10:17,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:17,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:20,683 INFO L134 CoverageAnalysis]: Checked inductivity of 5519 backedges. 621 proven. 4692 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2020-12-23 07:10:20,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560169986] [2020-12-23 07:10:20,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374034367] [2020-12-23 07:10:20,684 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:20,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:20,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 70 conjunts are in the unsatisfiable core [2020-12-23 07:10:20,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:21,051 INFO L134 CoverageAnalysis]: Checked inductivity of 5519 backedges. 621 proven. 4692 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2020-12-23 07:10:21,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:21,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 72 [2020-12-23 07:10:21,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619342168] [2020-12-23 07:10:21,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-12-23 07:10:21,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:21,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-12-23 07:10:21,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2020-12-23 07:10:21,053 INFO L87 Difference]: Start difference. First operand 173 states and 179 transitions. Second operand 72 states. [2020-12-23 07:10:21,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:21,369 INFO L93 Difference]: Finished difference Result 210 states and 223 transitions. [2020-12-23 07:10:21,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-12-23 07:10:21,370 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 172 [2020-12-23 07:10:21,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:21,371 INFO L225 Difference]: With dead ends: 210 [2020-12-23 07:10:21,371 INFO L226 Difference]: Without dead ends: 175 [2020-12-23 07:10:21,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2020-12-23 07:10:21,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-12-23 07:10:21,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2020-12-23 07:10:21,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-12-23 07:10:21,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 181 transitions. [2020-12-23 07:10:21,385 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 181 transitions. Word has length 172 [2020-12-23 07:10:21,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:21,385 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 181 transitions. [2020-12-23 07:10:21,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-12-23 07:10:21,386 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 181 transitions. [2020-12-23 07:10:21,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-12-23 07:10:21,387 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:21,387 INFO L422 BasicCegarLoop]: trace histogram [74, 69, 19, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:21,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:21,601 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:21,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:21,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1456432582, now seen corresponding path program 68 times [2020-12-23 07:10:21,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:21,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127602163] [2020-12-23 07:10:21,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:21,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:25,145 INFO L134 CoverageAnalysis]: Checked inductivity of 5666 backedges. 630 proven. 4830 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2020-12-23 07:10:25,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127602163] [2020-12-23 07:10:25,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842970340] [2020-12-23 07:10:25,146 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:25,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:10:25,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:25,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 71 conjunts are in the unsatisfiable core [2020-12-23 07:10:25,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:25,483 INFO L134 CoverageAnalysis]: Checked inductivity of 5666 backedges. 630 proven. 4830 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2020-12-23 07:10:25,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:25,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 73 [2020-12-23 07:10:25,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345306217] [2020-12-23 07:10:25,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-12-23 07:10:25,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:25,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-12-23 07:10:25,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2020-12-23 07:10:25,485 INFO L87 Difference]: Start difference. First operand 175 states and 181 transitions. Second operand 73 states. [2020-12-23 07:10:25,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:25,965 INFO L93 Difference]: Finished difference Result 212 states and 225 transitions. [2020-12-23 07:10:25,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-12-23 07:10:25,966 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 174 [2020-12-23 07:10:25,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:25,967 INFO L225 Difference]: With dead ends: 212 [2020-12-23 07:10:25,967 INFO L226 Difference]: Without dead ends: 177 [2020-12-23 07:10:25,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2020-12-23 07:10:25,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-12-23 07:10:25,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2020-12-23 07:10:25,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-12-23 07:10:25,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 183 transitions. [2020-12-23 07:10:25,982 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 183 transitions. Word has length 174 [2020-12-23 07:10:25,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:25,982 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 183 transitions. [2020-12-23 07:10:25,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-12-23 07:10:25,982 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 183 transitions. [2020-12-23 07:10:25,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-12-23 07:10:25,983 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:25,983 INFO L422 BasicCegarLoop]: trace histogram [75, 70, 19, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:26,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:26,198 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:26,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:26,199 INFO L82 PathProgramCache]: Analyzing trace with hash 861546985, now seen corresponding path program 69 times [2020-12-23 07:10:26,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:26,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063264880] [2020-12-23 07:10:26,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:26,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:29,809 INFO L134 CoverageAnalysis]: Checked inductivity of 5815 backedges. 639 proven. 4970 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2020-12-23 07:10:29,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063264880] [2020-12-23 07:10:29,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504794863] [2020-12-23 07:10:29,809 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:29,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-12-23 07:10:29,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:29,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 07:10:29,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:31,453 INFO L134 CoverageAnalysis]: Checked inductivity of 5815 backedges. 655 proven. 190 refuted. 0 times theorem prover too weak. 4970 trivial. 0 not checked. [2020-12-23 07:10:31,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:31,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 25] total 96 [2020-12-23 07:10:31,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059059267] [2020-12-23 07:10:31,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 96 states [2020-12-23 07:10:31,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:31,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2020-12-23 07:10:31,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2927, Invalid=6193, Unknown=0, NotChecked=0, Total=9120 [2020-12-23 07:10:31,456 INFO L87 Difference]: Start difference. First operand 177 states and 183 transitions. Second operand 96 states. [2020-12-23 07:10:37,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:37,077 INFO L93 Difference]: Finished difference Result 245 states and 274 transitions. [2020-12-23 07:10:37,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2020-12-23 07:10:37,078 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 176 [2020-12-23 07:10:37,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:37,079 INFO L225 Difference]: With dead ends: 245 [2020-12-23 07:10:37,079 INFO L226 Difference]: Without dead ends: 210 [2020-12-23 07:10:37,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4549 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=9388, Invalid=18334, Unknown=0, NotChecked=0, Total=27722 [2020-12-23 07:10:37,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-12-23 07:10:37,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 180. [2020-12-23 07:10:37,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-12-23 07:10:37,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 186 transitions. [2020-12-23 07:10:37,096 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 186 transitions. Word has length 176 [2020-12-23 07:10:37,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:37,096 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 186 transitions. [2020-12-23 07:10:37,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 96 states. [2020-12-23 07:10:37,096 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 186 transitions. [2020-12-23 07:10:37,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-12-23 07:10:37,097 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:37,097 INFO L422 BasicCegarLoop]: trace histogram [76, 71, 20, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:37,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2020-12-23 07:10:37,310 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:37,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:37,311 INFO L82 PathProgramCache]: Analyzing trace with hash -261938784, now seen corresponding path program 70 times [2020-12-23 07:10:37,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:37,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054136330] [2020-12-23 07:10:37,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:37,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:41,078 INFO L134 CoverageAnalysis]: Checked inductivity of 5986 backedges. 648 proven. 5112 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2020-12-23 07:10:41,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054136330] [2020-12-23 07:10:41,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654127327] [2020-12-23 07:10:41,078 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:41,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:10:41,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:41,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 73 conjunts are in the unsatisfiable core [2020-12-23 07:10:41,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:41,451 INFO L134 CoverageAnalysis]: Checked inductivity of 5986 backedges. 648 proven. 5112 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2020-12-23 07:10:41,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:41,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 75 [2020-12-23 07:10:41,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173731973] [2020-12-23 07:10:41,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-12-23 07:10:41,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:41,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-12-23 07:10:41,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-12-23 07:10:41,452 INFO L87 Difference]: Start difference. First operand 180 states and 186 transitions. Second operand 75 states. [2020-12-23 07:10:41,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:41,965 INFO L93 Difference]: Finished difference Result 218 states and 231 transitions. [2020-12-23 07:10:41,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-12-23 07:10:41,966 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 179 [2020-12-23 07:10:41,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:41,968 INFO L225 Difference]: With dead ends: 218 [2020-12-23 07:10:41,968 INFO L226 Difference]: Without dead ends: 182 [2020-12-23 07:10:41,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-12-23 07:10:41,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-12-23 07:10:41,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2020-12-23 07:10:41,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-12-23 07:10:41,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 188 transitions. [2020-12-23 07:10:41,985 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 188 transitions. Word has length 179 [2020-12-23 07:10:41,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:41,985 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 188 transitions. [2020-12-23 07:10:41,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-12-23 07:10:41,986 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 188 transitions. [2020-12-23 07:10:41,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-12-23 07:10:41,987 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:41,987 INFO L422 BasicCegarLoop]: trace histogram [77, 72, 20, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:42,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:42,202 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:42,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:42,203 INFO L82 PathProgramCache]: Analyzing trace with hash 195853149, now seen corresponding path program 71 times [2020-12-23 07:10:42,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:42,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917349475] [2020-12-23 07:10:42,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:42,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:46,068 INFO L134 CoverageAnalysis]: Checked inductivity of 6139 backedges. 657 proven. 5256 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2020-12-23 07:10:46,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917349475] [2020-12-23 07:10:46,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306161716] [2020-12-23 07:10:46,071 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:46,248 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2020-12-23 07:10:46,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:46,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 74 conjunts are in the unsatisfiable core [2020-12-23 07:10:46,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:46,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6139 backedges. 657 proven. 5256 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2020-12-23 07:10:46,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:46,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 76 [2020-12-23 07:10:46,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008142278] [2020-12-23 07:10:46,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-12-23 07:10:46,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:46,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-12-23 07:10:46,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2020-12-23 07:10:46,449 INFO L87 Difference]: Start difference. First operand 182 states and 188 transitions. Second operand 76 states. [2020-12-23 07:10:46,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:46,986 INFO L93 Difference]: Finished difference Result 220 states and 233 transitions. [2020-12-23 07:10:46,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-12-23 07:10:46,987 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 181 [2020-12-23 07:10:46,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:46,988 INFO L225 Difference]: With dead ends: 220 [2020-12-23 07:10:46,988 INFO L226 Difference]: Without dead ends: 184 [2020-12-23 07:10:46,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2020-12-23 07:10:46,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-12-23 07:10:47,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2020-12-23 07:10:47,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-12-23 07:10:47,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 190 transitions. [2020-12-23 07:10:47,000 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 190 transitions. Word has length 181 [2020-12-23 07:10:47,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:47,000 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 190 transitions. [2020-12-23 07:10:47,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-12-23 07:10:47,000 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 190 transitions. [2020-12-23 07:10:47,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-12-23 07:10:47,001 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:47,001 INFO L422 BasicCegarLoop]: trace histogram [78, 73, 20, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:47,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:47,202 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:47,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:47,203 INFO L82 PathProgramCache]: Analyzing trace with hash 2047236570, now seen corresponding path program 72 times [2020-12-23 07:10:47,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:47,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822280573] [2020-12-23 07:10:47,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:47,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:51,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6294 backedges. 666 proven. 5402 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2020-12-23 07:10:51,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822280573] [2020-12-23 07:10:51,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652495519] [2020-12-23 07:10:51,181 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:51,283 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2020-12-23 07:10:51,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:51,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 07:10:51,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:53,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6294 backedges. 682 proven. 210 refuted. 0 times theorem prover too weak. 5402 trivial. 0 not checked. [2020-12-23 07:10:53,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:53,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 26] total 100 [2020-12-23 07:10:53,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595836439] [2020-12-23 07:10:53,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 100 states [2020-12-23 07:10:53,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:53,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2020-12-23 07:10:53,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3174, Invalid=6726, Unknown=0, NotChecked=0, Total=9900 [2020-12-23 07:10:53,094 INFO L87 Difference]: Start difference. First operand 184 states and 190 transitions. Second operand 100 states. [2020-12-23 07:10:59,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:59,384 INFO L93 Difference]: Finished difference Result 253 states and 282 transitions. [2020-12-23 07:10:59,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2020-12-23 07:10:59,386 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 183 [2020-12-23 07:10:59,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:59,386 INFO L225 Difference]: With dead ends: 253 [2020-12-23 07:10:59,387 INFO L226 Difference]: Without dead ends: 217 [2020-12-23 07:10:59,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4929 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=10204, Invalid=19898, Unknown=0, NotChecked=0, Total=30102 [2020-12-23 07:10:59,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-12-23 07:10:59,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 187. [2020-12-23 07:10:59,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-12-23 07:10:59,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 193 transitions. [2020-12-23 07:10:59,398 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 193 transitions. Word has length 183 [2020-12-23 07:10:59,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:59,398 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 193 transitions. [2020-12-23 07:10:59,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 100 states. [2020-12-23 07:10:59,398 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 193 transitions. [2020-12-23 07:10:59,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-12-23 07:10:59,399 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:59,399 INFO L422 BasicCegarLoop]: trace histogram [79, 74, 21, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:59,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:59,607 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:59,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:59,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1929936693, now seen corresponding path program 73 times [2020-12-23 07:10:59,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:59,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000169949] [2020-12-23 07:10:59,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:59,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:11:03,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6472 backedges. 675 proven. 5550 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-12-23 07:11:03,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000169949] [2020-12-23 07:11:03,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095539948] [2020-12-23 07:11:03,801 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:11:03,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:11:03,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 76 conjunts are in the unsatisfiable core [2020-12-23 07:11:03,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:11:04,200 INFO L134 CoverageAnalysis]: Checked inductivity of 6472 backedges. 675 proven. 5550 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-12-23 07:11:04,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:11:04,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 78 [2020-12-23 07:11:04,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186977966] [2020-12-23 07:11:04,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-12-23 07:11:04,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:11:04,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-12-23 07:11:04,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-12-23 07:11:04,203 INFO L87 Difference]: Start difference. First operand 187 states and 193 transitions. Second operand 78 states. [2020-12-23 07:11:04,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:11:04,540 INFO L93 Difference]: Finished difference Result 226 states and 239 transitions. [2020-12-23 07:11:04,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-12-23 07:11:04,541 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 186 [2020-12-23 07:11:04,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:11:04,542 INFO L225 Difference]: With dead ends: 226 [2020-12-23 07:11:04,542 INFO L226 Difference]: Without dead ends: 189 [2020-12-23 07:11:04,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-12-23 07:11:04,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-12-23 07:11:04,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2020-12-23 07:11:04,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-12-23 07:11:04,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 195 transitions. [2020-12-23 07:11:04,561 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 195 transitions. Word has length 186 [2020-12-23 07:11:04,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:11:04,561 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 195 transitions. [2020-12-23 07:11:04,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-12-23 07:11:04,561 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 195 transitions. [2020-12-23 07:11:04,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-12-23 07:11:04,562 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:11:04,562 INFO L422 BasicCegarLoop]: trace histogram [80, 75, 21, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:11:04,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-12-23 07:11:04,776 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:11:04,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:11:04,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1116264744, now seen corresponding path program 74 times [2020-12-23 07:11:04,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:11:04,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130438336] [2020-12-23 07:11:04,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:11:04,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:11:09,095 INFO L134 CoverageAnalysis]: Checked inductivity of 6631 backedges. 684 proven. 5700 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-12-23 07:11:09,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130438336] [2020-12-23 07:11:09,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749906134] [2020-12-23 07:11:09,095 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:11:09,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:11:09,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:11:09,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 77 conjunts are in the unsatisfiable core [2020-12-23 07:11:09,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:11:09,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6631 backedges. 684 proven. 5700 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-12-23 07:11:09,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:11:09,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 79 [2020-12-23 07:11:09,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661587348] [2020-12-23 07:11:09,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-12-23 07:11:09,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:11:09,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-12-23 07:11:09,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2020-12-23 07:11:09,496 INFO L87 Difference]: Start difference. First operand 189 states and 195 transitions. Second operand 79 states. [2020-12-23 07:11:10,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:11:10,015 INFO L93 Difference]: Finished difference Result 228 states and 241 transitions. [2020-12-23 07:11:10,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-12-23 07:11:10,016 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 188 [2020-12-23 07:11:10,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:11:10,017 INFO L225 Difference]: With dead ends: 228 [2020-12-23 07:11:10,017 INFO L226 Difference]: Without dead ends: 191 [2020-12-23 07:11:10,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2020-12-23 07:11:10,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-12-23 07:11:10,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2020-12-23 07:11:10,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-12-23 07:11:10,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 197 transitions. [2020-12-23 07:11:10,036 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 197 transitions. Word has length 188 [2020-12-23 07:11:10,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:11:10,036 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 197 transitions. [2020-12-23 07:11:10,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 79 states. [2020-12-23 07:11:10,036 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 197 transitions. [2020-12-23 07:11:10,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-12-23 07:11:10,037 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:11:10,037 INFO L422 BasicCegarLoop]: trace histogram [81, 76, 21, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:11:10,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:11:10,251 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:11:10,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:11:10,251 INFO L82 PathProgramCache]: Analyzing trace with hash 651850171, now seen corresponding path program 75 times [2020-12-23 07:11:10,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:11:10,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466310677] [2020-12-23 07:11:10,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:11:10,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:11:14,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6792 backedges. 693 proven. 5852 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-12-23 07:11:14,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466310677] [2020-12-23 07:11:14,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481142017] [2020-12-23 07:11:14,719 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:11:14,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-12-23 07:11:14,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:11:14,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 07:11:14,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:11:15,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6792 backedges. 836 proven. 25 refuted. 0 times theorem prover too weak. 5931 trivial. 0 not checked. [2020-12-23 07:11:15,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:11:15,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 8] total 85 [2020-12-23 07:11:15,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641282163] [2020-12-23 07:11:15,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 85 states [2020-12-23 07:11:15,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:11:15,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2020-12-23 07:11:15,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2020-12-23 07:11:15,687 INFO L87 Difference]: Start difference. First operand 191 states and 197 transitions. Second operand 85 states. [2020-12-23 07:11:16,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:11:16,212 INFO L93 Difference]: Finished difference Result 233 states and 249 transitions. [2020-12-23 07:11:16,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-12-23 07:11:16,212 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 190 [2020-12-23 07:11:16,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:11:16,214 INFO L225 Difference]: With dead ends: 233 [2020-12-23 07:11:16,214 INFO L226 Difference]: Without dead ends: 196 [2020-12-23 07:11:16,215 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2020-12-23 07:11:16,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-12-23 07:11:16,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 195. [2020-12-23 07:11:16,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-12-23 07:11:16,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 202 transitions. [2020-12-23 07:11:16,227 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 202 transitions. Word has length 190 [2020-12-23 07:11:16,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:11:16,227 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 202 transitions. [2020-12-23 07:11:16,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 85 states. [2020-12-23 07:11:16,227 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 202 transitions. [2020-12-23 07:11:16,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-12-23 07:11:16,228 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:11:16,228 INFO L422 BasicCegarLoop]: trace histogram [83, 77, 21, 6, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:11:16,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-12-23 07:11:16,431 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:11:16,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:11:16,431 INFO L82 PathProgramCache]: Analyzing trace with hash 185817155, now seen corresponding path program 76 times [2020-12-23 07:11:16,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:11:16,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982466886] [2020-12-23 07:11:16,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:11:16,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:11:21,032 INFO L134 CoverageAnalysis]: Checked inductivity of 7120 backedges. 858 proven. 6006 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-12-23 07:11:21,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982466886] [2020-12-23 07:11:21,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513912361] [2020-12-23 07:11:21,032 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:11:21,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:11:21,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:11:21,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 79 conjunts are in the unsatisfiable core [2020-12-23 07:11:21,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:11:21,400 INFO L134 CoverageAnalysis]: Checked inductivity of 7120 backedges. 858 proven. 6006 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-12-23 07:11:21,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:11:21,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 81 [2020-12-23 07:11:21,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968126438] [2020-12-23 07:11:21,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-12-23 07:11:21,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:11:21,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-12-23 07:11:21,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2020-12-23 07:11:21,402 INFO L87 Difference]: Start difference. First operand 195 states and 202 transitions. Second operand 81 states. [2020-12-23 07:11:21,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:11:21,997 INFO L93 Difference]: Finished difference Result 236 states and 251 transitions. [2020-12-23 07:11:21,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-12-23 07:11:21,998 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 194 [2020-12-23 07:11:21,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:11:21,999 INFO L225 Difference]: With dead ends: 236 [2020-12-23 07:11:21,999 INFO L226 Difference]: Without dead ends: 197 [2020-12-23 07:11:21,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2020-12-23 07:11:22,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-12-23 07:11:22,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2020-12-23 07:11:22,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-12-23 07:11:22,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 204 transitions. [2020-12-23 07:11:22,010 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 204 transitions. Word has length 194 [2020-12-23 07:11:22,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:11:22,011 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 204 transitions. [2020-12-23 07:11:22,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2020-12-23 07:11:22,011 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 204 transitions. [2020-12-23 07:11:22,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-12-23 07:11:22,011 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:11:22,011 INFO L422 BasicCegarLoop]: trace histogram [84, 78, 21, 6, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:11:22,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:11:22,212 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:11:22,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:11:22,213 INFO L82 PathProgramCache]: Analyzing trace with hash 327003366, now seen corresponding path program 77 times [2020-12-23 07:11:22,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:11:22,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790361561] [2020-12-23 07:11:22,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:11:22,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:11:26,933 INFO L134 CoverageAnalysis]: Checked inductivity of 7287 backedges. 869 proven. 6162 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-12-23 07:11:26,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790361561] [2020-12-23 07:11:26,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562292727] [2020-12-23 07:11:26,934 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:11:27,129 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 85 check-sat command(s) [2020-12-23 07:11:27,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:11:27,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 80 conjunts are in the unsatisfiable core [2020-12-23 07:11:27,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:11:27,385 INFO L134 CoverageAnalysis]: Checked inductivity of 7287 backedges. 869 proven. 6162 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-12-23 07:11:27,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:11:27,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 82 [2020-12-23 07:11:27,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898287998] [2020-12-23 07:11:27,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-12-23 07:11:27,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:11:27,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-12-23 07:11:27,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2020-12-23 07:11:27,388 INFO L87 Difference]: Start difference. First operand 197 states and 204 transitions. Second operand 82 states. [2020-12-23 07:11:27,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:11:27,990 INFO L93 Difference]: Finished difference Result 238 states and 253 transitions. [2020-12-23 07:11:27,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-12-23 07:11:27,991 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 196 [2020-12-23 07:11:27,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:11:27,992 INFO L225 Difference]: With dead ends: 238 [2020-12-23 07:11:27,992 INFO L226 Difference]: Without dead ends: 199 [2020-12-23 07:11:27,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2020-12-23 07:11:27,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-12-23 07:11:28,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2020-12-23 07:11:28,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-12-23 07:11:28,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 206 transitions. [2020-12-23 07:11:28,004 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 206 transitions. Word has length 196 [2020-12-23 07:11:28,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:11:28,005 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 206 transitions. [2020-12-23 07:11:28,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-12-23 07:11:28,005 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 206 transitions. [2020-12-23 07:11:28,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2020-12-23 07:11:28,006 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:11:28,006 INFO L422 BasicCegarLoop]: trace histogram [85, 79, 21, 6, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:11:28,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:11:28,221 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:11:28,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:11:28,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1432001335, now seen corresponding path program 78 times [2020-12-23 07:11:28,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:11:28,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220744619] [2020-12-23 07:11:28,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:11:28,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:11:33,074 INFO L134 CoverageAnalysis]: Checked inductivity of 7456 backedges. 880 proven. 6320 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-12-23 07:11:33,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220744619] [2020-12-23 07:11:33,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824254778] [2020-12-23 07:11:33,074 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:11:33,186 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2020-12-23 07:11:33,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:11:33,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 07:11:33,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:11:35,273 INFO L134 CoverageAnalysis]: Checked inductivity of 7456 backedges. 905 proven. 231 refuted. 0 times theorem prover too weak. 6320 trivial. 0 not checked. [2020-12-23 07:11:35,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:11:35,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 27] total 107 [2020-12-23 07:11:35,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803906878] [2020-12-23 07:11:35,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 107 states [2020-12-23 07:11:35,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:11:35,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2020-12-23 07:11:35,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3671, Invalid=7671, Unknown=0, NotChecked=0, Total=11342 [2020-12-23 07:11:35,275 INFO L87 Difference]: Start difference. First operand 199 states and 206 transitions. Second operand 107 states.