/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/array-fpi/s5if.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 01:31:09,144 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 01:31:09,147 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 01:31:09,201 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 01:31:09,202 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 01:31:09,207 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 01:31:09,210 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 01:31:09,215 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 01:31:09,221 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 01:31:09,231 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 01:31:09,237 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 01:31:09,239 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 01:31:09,240 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 01:31:09,244 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 01:31:09,263 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 01:31:09,265 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 01:31:09,266 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 01:31:09,272 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 01:31:09,282 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 01:31:09,290 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 01:31:09,293 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 01:31:09,301 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 01:31:09,304 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 01:31:09,305 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 01:31:09,310 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 01:31:09,371 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 01:31:09,373 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 01:31:09,374 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 01:31:09,375 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 01:31:09,448 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 01:31:09,449 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 01:31:09,457 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 01:31:09,458 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 01:31:09,458 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 01:31:09,458 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 01:31:09,458 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 01:31:09,459 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 01:31:09,459 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 01:31:09,459 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 01:31:09,461 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 01:31:09,461 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 01:31:09,462 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 01:31:09,462 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 01:31:09,462 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 01:31:09,463 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 01:31:09,463 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 01:31:09,463 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 01:31:09,464 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 01:31:09,464 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 01:31:09,464 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 01:31:09,464 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 01:31:09,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 01:31:09,465 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 01:31:09,465 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 01:31:09,465 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 01:31:10,095 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 01:31:10,135 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 01:31:10,139 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 01:31:10,142 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 01:31:10,151 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 01:31:10,153 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/s5if.c [2020-12-23 01:31:10,264 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/83601a872/258ee7cb36ff46ab8a5da0f32b16803f/FLAGf1364216f [2020-12-23 01:31:11,146 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 01:31:11,147 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-fpi/s5if.c [2020-12-23 01:31:11,163 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/83601a872/258ee7cb36ff46ab8a5da0f32b16803f/FLAGf1364216f [2020-12-23 01:31:11,430 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/83601a872/258ee7cb36ff46ab8a5da0f32b16803f [2020-12-23 01:31:11,435 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 01:31:11,439 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 01:31:11,445 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 01:31:11,445 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 01:31:11,451 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 01:31:11,453 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 01:31:11" (1/1) ... [2020-12-23 01:31:11,457 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@509b2d57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:31:11, skipping insertion in model container [2020-12-23 01:31:11,457 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 01:31:11" (1/1) ... [2020-12-23 01:31:11,470 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 01:31:11,498 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 01:31:11,730 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/array-fpi/s5if.c[587,600] left hand side expression in assignment: lhs: VariableLHS[~N~0,GLOBAL] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~sum~0,],[IntegerLiteral[0]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~sum~0,],[IntegerLiteral[0]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~sum~0,],[IntegerLiteral[0]]] [2020-12-23 01:31:11,767 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 01:31:11,780 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 01:31:11,797 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/array-fpi/s5if.c[587,600] left hand side expression in assignment: lhs: VariableLHS[~N~0,GLOBAL] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#sum~0,],base],StructAccessExpression[IdentifierExpression[~#sum~0,],offset]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#sum~0,],base],StructAccessExpression[IdentifierExpression[~#sum~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#sum~0,],base],StructAccessExpression[IdentifierExpression[~#sum~0,],offset]]] [2020-12-23 01:31:11,812 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 01:31:11,836 INFO L208 MainTranslator]: Completed translation [2020-12-23 01:31:11,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:31:11 WrapperNode [2020-12-23 01:31:11,837 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 01:31:11,839 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 01:31:11,839 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 01:31:11,839 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 01:31:11,852 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:31:11" (1/1) ... [2020-12-23 01:31:11,866 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:31:11" (1/1) ... [2020-12-23 01:31:11,902 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 01:31:11,904 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 01:31:11,904 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 01:31:11,904 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 01:31:11,920 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:31:11" (1/1) ... [2020-12-23 01:31:11,921 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:31:11" (1/1) ... [2020-12-23 01:31:11,924 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:31:11" (1/1) ... [2020-12-23 01:31:11,925 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:31:11" (1/1) ... [2020-12-23 01:31:11,934 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:31:11" (1/1) ... [2020-12-23 01:31:11,944 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:31:11" (1/1) ... [2020-12-23 01:31:11,948 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:31:11" (1/1) ... [2020-12-23 01:31:11,954 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 01:31:11,958 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 01:31:11,958 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 01:31:11,958 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 01:31:11,963 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:31:11" (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 01:31:12,130 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 01:31:12,131 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 01:31:12,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 01:31:12,132 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-23 01:31:12,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 01:31:12,133 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 01:31:12,134 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 01:31:12,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 01:31:12,751 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 01:31:12,752 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-23 01:31:12,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:31:12 BoogieIcfgContainer [2020-12-23 01:31:12,758 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 01:31:12,764 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 01:31:12,764 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 01:31:12,779 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 01:31:12,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 01:31:11" (1/3) ... [2020-12-23 01:31:12,781 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3676f770 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 01:31:12, skipping insertion in model container [2020-12-23 01:31:12,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:31:11" (2/3) ... [2020-12-23 01:31:12,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3676f770 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 01:31:12, skipping insertion in model container [2020-12-23 01:31:12,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:31:12" (3/3) ... [2020-12-23 01:31:12,788 INFO L111 eAbstractionObserver]: Analyzing ICFG s5if.c [2020-12-23 01:31:12,810 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 01:31:12,830 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 01:31:12,872 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 01:31:12,914 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 01:31:12,914 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 01:31:12,914 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 01:31:12,915 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 01:31:12,915 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 01:31:12,915 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 01:31:12,915 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 01:31:12,916 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 01:31:12,938 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-12-23 01:31:12,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 01:31:12,946 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:31:12,948 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:31:12,948 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:31:12,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:31:12,958 INFO L82 PathProgramCache]: Analyzing trace with hash 356661439, now seen corresponding path program 1 times [2020-12-23 01:31:12,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:31:12,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682731988] [2020-12-23 01:31:12,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:31:13,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:31:13,221 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 01:31:13,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682731988] [2020-12-23 01:31:13,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:31:13,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 01:31:13,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128465662] [2020-12-23 01:31:13,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 01:31:13,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:31:13,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 01:31:13,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 01:31:13,261 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-12-23 01:31:13,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:31:13,289 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2020-12-23 01:31:13,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 01:31:13,291 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-12-23 01:31:13,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:31:13,307 INFO L225 Difference]: With dead ends: 34 [2020-12-23 01:31:13,308 INFO L226 Difference]: Without dead ends: 15 [2020-12-23 01:31:13,312 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 01:31:13,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-23 01:31:13,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-23 01:31:13,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-23 01:31:13,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-12-23 01:31:13,369 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2020-12-23 01:31:13,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:31:13,370 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-12-23 01:31:13,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 01:31:13,370 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-12-23 01:31:13,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 01:31:13,371 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:31:13,371 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:31:13,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 01:31:13,372 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:31:13,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:31:13,374 INFO L82 PathProgramCache]: Analyzing trace with hash -452685187, now seen corresponding path program 1 times [2020-12-23 01:31:13,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:31:13,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063706301] [2020-12-23 01:31:13,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:31:13,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:31:13,532 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 01:31:13,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063706301] [2020-12-23 01:31:13,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:31:13,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 01:31:13,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821826275] [2020-12-23 01:31:13,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 01:31:13,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:31:13,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 01:31:13,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 01:31:13,538 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 4 states. [2020-12-23 01:31:13,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:31:13,675 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2020-12-23 01:31:13,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 01:31:13,681 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-12-23 01:31:13,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:31:13,682 INFO L225 Difference]: With dead ends: 28 [2020-12-23 01:31:13,682 INFO L226 Difference]: Without dead ends: 20 [2020-12-23 01:31:13,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 01:31:13,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-23 01:31:13,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2020-12-23 01:31:13,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-23 01:31:13,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-12-23 01:31:13,696 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2020-12-23 01:31:13,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:31:13,697 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-12-23 01:31:13,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 01:31:13,700 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-12-23 01:31:13,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 01:31:13,701 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:31:13,701 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:31:13,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 01:31:13,702 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:31:13,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:31:13,705 INFO L82 PathProgramCache]: Analyzing trace with hash 623611495, now seen corresponding path program 1 times [2020-12-23 01:31:13,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:31:13,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684427669] [2020-12-23 01:31:13,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:31:13,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:31:14,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:31:14,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684427669] [2020-12-23 01:31:14,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938043691] [2020-12-23 01:31:14,549 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 01:31:14,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:31:14,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 01:31:14,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:31:14,900 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 01:31:14,916 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:14,932 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:14,944 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-23 01:31:14,946 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:14,960 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:14,962 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:31:14,962 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:29, output treesize:21 [2020-12-23 01:31:15,032 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 01:31:15,036 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:15,059 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:15,061 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:31:15,062 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2020-12-23 01:31:15,534 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:15,534 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 57 [2020-12-23 01:31:15,541 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:15,572 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:15,591 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-12-23 01:31:15,592 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:70, output treesize:53 [2020-12-23 01:31:15,788 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:31:15,804 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:31:15,807 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:31:15,813 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:31:15,823 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:31:15,825 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 01:31:15,838 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2020-12-23 01:31:15,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:31:15,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:31:15,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2020-12-23 01:31:15,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40583645] [2020-12-23 01:31:15,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 01:31:15,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:31:15,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 01:31:15,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2020-12-23 01:31:15,926 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 20 states. [2020-12-23 01:31:16,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:31:16,984 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-12-23 01:31:16,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 01:31:16,985 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 16 [2020-12-23 01:31:16,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:31:16,989 INFO L225 Difference]: With dead ends: 35 [2020-12-23 01:31:16,989 INFO L226 Difference]: Without dead ends: 26 [2020-12-23 01:31:16,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=190, Invalid=622, Unknown=0, NotChecked=0, Total=812 [2020-12-23 01:31:16,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-23 01:31:16,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2020-12-23 01:31:16,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-23 01:31:16,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-12-23 01:31:16,999 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 16 [2020-12-23 01:31:16,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:31:17,000 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-12-23 01:31:17,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 01:31:17,000 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-12-23 01:31:17,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 01:31:17,001 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:31:17,001 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:31:17,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 01:31:17,216 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:31:17,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:31:17,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1137819675, now seen corresponding path program 2 times [2020-12-23 01:31:17,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:31:17,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953293930] [2020-12-23 01:31:17,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:31:17,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:31:17,363 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:31:17,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953293930] [2020-12-23 01:31:17,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795936206] [2020-12-23 01:31:17,364 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 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 01:31:17,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:31:17,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:31:17,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 01:31:17,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:31:17,560 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:31:17,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:31:17,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-12-23 01:31:17,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474511486] [2020-12-23 01:31:17,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 01:31:17,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:31:17,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 01:31:17,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-12-23 01:31:17,565 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 10 states. [2020-12-23 01:31:17,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:31:17,817 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-12-23 01:31:17,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 01:31:17,821 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-12-23 01:31:17,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:31:17,822 INFO L225 Difference]: With dead ends: 33 [2020-12-23 01:31:17,823 INFO L226 Difference]: Without dead ends: 29 [2020-12-23 01:31:17,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-12-23 01:31:17,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-23 01:31:17,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2020-12-23 01:31:17,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-23 01:31:17,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-12-23 01:31:17,846 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 18 [2020-12-23 01:31:17,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:31:17,847 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-12-23 01:31:17,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 01:31:17,849 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-12-23 01:31:17,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 01:31:17,850 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:31:17,851 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:31:18,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:31:18,054 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:31:18,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:31:18,055 INFO L82 PathProgramCache]: Analyzing trace with hash -479454913, now seen corresponding path program 3 times [2020-12-23 01:31:18,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:31:18,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677744047] [2020-12-23 01:31:18,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:31:18,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:31:18,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:31:18,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677744047] [2020-12-23 01:31:18,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650168383] [2020-12-23 01:31:18,201 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 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 01:31:18,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 01:31:18,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:31:18,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 01:31:18,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:31:18,376 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:31:18,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:31:18,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-12-23 01:31:18,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209429403] [2020-12-23 01:31:18,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 01:31:18,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:31:18,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 01:31:18,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-12-23 01:31:18,383 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 10 states. [2020-12-23 01:31:18,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:31:18,549 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2020-12-23 01:31:18,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 01:31:18,550 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2020-12-23 01:31:18,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:31:18,551 INFO L225 Difference]: With dead ends: 37 [2020-12-23 01:31:18,552 INFO L226 Difference]: Without dead ends: 25 [2020-12-23 01:31:18,553 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-12-23 01:31:18,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-23 01:31:18,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-12-23 01:31:18,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-23 01:31:18,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-12-23 01:31:18,560 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 19 [2020-12-23 01:31:18,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:31:18,560 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-12-23 01:31:18,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 01:31:18,561 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-12-23 01:31:18,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 01:31:18,562 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:31:18,562 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:31:18,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:31:18,776 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:31:18,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:31:18,778 INFO L82 PathProgramCache]: Analyzing trace with hash 634982145, now seen corresponding path program 4 times [2020-12-23 01:31:18,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:31:18,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456518694] [2020-12-23 01:31:18,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:31:18,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:31:19,609 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:31:19,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456518694] [2020-12-23 01:31:19,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90549655] [2020-12-23 01:31:19,611 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 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 01:31:19,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:31:19,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:31:19,671 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 01:31:19,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:31:19,696 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 01:31:19,699 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:19,707 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:19,714 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-23 01:31:19,715 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:19,723 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:19,725 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:31:19,725 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:23, output treesize:15 [2020-12-23 01:31:19,772 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 01:31:19,774 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:19,787 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:19,789 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:31:19,790 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2020-12-23 01:31:19,903 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:19,904 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 56 [2020-12-23 01:31:19,908 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:19,960 INFO L625 ElimStorePlain]: treesize reduction 20, result has 64.3 percent of original size [2020-12-23 01:31:19,961 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:31:19,962 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:36 [2020-12-23 01:31:20,256 INFO L348 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2020-12-23 01:31:20,257 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 75 [2020-12-23 01:31:20,261 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:20,297 INFO L625 ElimStorePlain]: treesize reduction 22, result has 70.7 percent of original size [2020-12-23 01:31:20,300 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 01:31:20,300 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:53 [2020-12-23 01:31:20,598 INFO L348 Elim1Store]: treesize reduction 10, result has 87.3 percent of original size [2020-12-23 01:31:20,599 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 131 [2020-12-23 01:31:20,608 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:20,663 INFO L625 ElimStorePlain]: treesize reduction 20, result has 75.6 percent of original size [2020-12-23 01:31:20,670 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-12-23 01:31:20,670 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:89, output treesize:62 [2020-12-23 01:31:20,841 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:31:20,847 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:31:20,863 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:31:20,866 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 01:31:20,877 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:31:20,880 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-23 01:31:20,898 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2020-12-23 01:31:20,943 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:31:20,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:31:20,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2020-12-23 01:31:20,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772125197] [2020-12-23 01:31:20,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 01:31:20,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:31:20,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 01:31:20,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2020-12-23 01:31:20,949 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 26 states. [2020-12-23 01:31:22,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:31:22,105 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2020-12-23 01:31:22,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 01:31:22,107 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 21 [2020-12-23 01:31:22,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:31:22,108 INFO L225 Difference]: With dead ends: 46 [2020-12-23 01:31:22,108 INFO L226 Difference]: Without dead ends: 35 [2020-12-23 01:31:22,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=200, Invalid=1360, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 01:31:22,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-23 01:31:22,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2020-12-23 01:31:22,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 01:31:22,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-12-23 01:31:22,117 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 21 [2020-12-23 01:31:22,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:31:22,117 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-12-23 01:31:22,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 01:31:22,118 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-12-23 01:31:22,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 01:31:22,118 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:31:22,119 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:31:22,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:31:22,335 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:31:22,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:31:22,336 INFO L82 PathProgramCache]: Analyzing trace with hash 692240447, now seen corresponding path program 1 times [2020-12-23 01:31:22,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:31:22,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70474517] [2020-12-23 01:31:22,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:31:22,352 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 01:31:22,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2028959125] [2020-12-23 01:31:22,352 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 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 01:31:22,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:31:22,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 01:31:22,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:31:22,428 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 01:31:22,430 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:22,434 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:22,434 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:31:22,435 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-12-23 01:31:22,469 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-23 01:31:22,470 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:22,475 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:22,476 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:31:22,476 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2020-12-23 01:31:22,517 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:22,518 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 47 [2020-12-23 01:31:22,520 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:22,556 INFO L625 ElimStorePlain]: treesize reduction 18, result has 48.6 percent of original size [2020-12-23 01:31:22,558 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:31:22,558 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:13 [2020-12-23 01:31:22,590 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2020-12-23 01:31:22,591 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:22,593 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:22,594 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:31:22,594 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2020-12-23 01:31:22,608 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:31:22,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70474517] [2020-12-23 01:31:22,609 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 01:31:22,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028959125] [2020-12-23 01:31:22,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 01:31:22,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-23 01:31:22,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571819187] [2020-12-23 01:31:22,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 01:31:22,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:31:22,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 01:31:22,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-12-23 01:31:22,612 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 9 states. [2020-12-23 01:31:22,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:31:22,742 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2020-12-23 01:31:22,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 01:31:22,746 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-12-23 01:31:22,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:31:22,747 INFO L225 Difference]: With dead ends: 41 [2020-12-23 01:31:22,747 INFO L226 Difference]: Without dead ends: 34 [2020-12-23 01:31:22,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-12-23 01:31:22,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-23 01:31:22,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-12-23 01:31:22,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 01:31:22,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-12-23 01:31:22,755 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 21 [2020-12-23 01:31:22,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:31:22,756 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-12-23 01:31:22,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 01:31:22,756 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-12-23 01:31:22,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 01:31:22,757 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:31:22,757 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:31:22,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-23 01:31:22,973 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:31:22,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:31:22,974 INFO L82 PathProgramCache]: Analyzing trace with hash -2132829117, now seen corresponding path program 5 times [2020-12-23 01:31:22,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:31:22,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76925876] [2020-12-23 01:31:22,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:31:22,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:31:23,073 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:31:23,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76925876] [2020-12-23 01:31:23,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764321493] [2020-12-23 01:31:23,074 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 01:31:23,134 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-23 01:31:23,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:31:23,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 01:31:23,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:31:23,232 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:31:23,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:31:23,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2020-12-23 01:31:23,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053996132] [2020-12-23 01:31:23,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 01:31:23,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:31:23,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 01:31:23,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-12-23 01:31:23,234 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 13 states. [2020-12-23 01:31:23,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:31:23,495 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2020-12-23 01:31:23,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 01:31:23,495 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 23 [2020-12-23 01:31:23,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:31:23,497 INFO L225 Difference]: With dead ends: 41 [2020-12-23 01:31:23,497 INFO L226 Difference]: Without dead ends: 37 [2020-12-23 01:31:23,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2020-12-23 01:31:23,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-23 01:31:23,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2020-12-23 01:31:23,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 01:31:23,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-12-23 01:31:23,506 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 23 [2020-12-23 01:31:23,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:31:23,506 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-12-23 01:31:23,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 01:31:23,506 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-12-23 01:31:23,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 01:31:23,507 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:31:23,507 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:31:23,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:31:23,716 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:31:23,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:31:23,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1038837147, now seen corresponding path program 6 times [2020-12-23 01:31:23,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:31:23,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216543566] [2020-12-23 01:31:23,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:31:23,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:31:23,835 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:31:23,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216543566] [2020-12-23 01:31:23,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30662856] [2020-12-23 01:31:23,839 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 01:31:23,910 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-23 01:31:23,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:31:23,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 01:31:23,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:31:24,010 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:31:24,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:31:24,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2020-12-23 01:31:24,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391239376] [2020-12-23 01:31:24,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 01:31:24,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:31:24,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 01:31:24,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-12-23 01:31:24,026 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 13 states. [2020-12-23 01:31:24,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:31:24,170 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2020-12-23 01:31:24,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 01:31:24,174 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2020-12-23 01:31:24,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:31:24,174 INFO L225 Difference]: With dead ends: 45 [2020-12-23 01:31:24,175 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 01:31:24,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2020-12-23 01:31:24,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 01:31:24,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-12-23 01:31:24,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 01:31:24,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-12-23 01:31:24,182 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 24 [2020-12-23 01:31:24,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:31:24,182 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-12-23 01:31:24,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 01:31:24,183 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-12-23 01:31:24,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 01:31:24,183 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:31:24,183 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:31:24,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:31:24,397 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:31:24,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:31:24,398 INFO L82 PathProgramCache]: Analyzing trace with hash -2121994781, now seen corresponding path program 7 times [2020-12-23 01:31:24,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:31:24,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706994964] [2020-12-23 01:31:24,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:31:24,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:31:25,035 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:31:25,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706994964] [2020-12-23 01:31:25,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352505586] [2020-12-23 01:31:25,036 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 01:31:25,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:31:25,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-23 01:31:25,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:31:25,165 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-23 01:31:25,166 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:25,174 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:25,175 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:31:25,175 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2020-12-23 01:31:25,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:31:25,223 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 01:31:25,224 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:25,235 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:25,236 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:31:25,237 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:30 [2020-12-23 01:31:25,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:31:25,373 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:25,374 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 56 [2020-12-23 01:31:25,377 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:25,420 INFO L625 ElimStorePlain]: treesize reduction 20, result has 64.9 percent of original size [2020-12-23 01:31:25,421 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:31:25,421 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:37 [2020-12-23 01:31:25,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:31:25,610 INFO L348 Elim1Store]: treesize reduction 52, result has 45.8 percent of original size [2020-12-23 01:31:25,610 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 71 [2020-12-23 01:31:25,614 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:25,670 INFO L625 ElimStorePlain]: treesize reduction 20, result has 72.2 percent of original size [2020-12-23 01:31:25,671 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:31:25,671 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:56, output treesize:52 [2020-12-23 01:31:26,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:31:26,065 INFO L348 Elim1Store]: treesize reduction 32, result has 56.2 percent of original size [2020-12-23 01:31:26,066 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 101 [2020-12-23 01:31:26,071 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:26,117 INFO L625 ElimStorePlain]: treesize reduction 70, result has 47.4 percent of original size [2020-12-23 01:31:26,120 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 01:31:26,120 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:80, output treesize:63 [2020-12-23 01:31:26,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:31:26,446 INFO L348 Elim1Store]: treesize reduction 32, result has 75.2 percent of original size [2020-12-23 01:31:26,447 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 88 treesize of output 171 [2020-12-23 01:31:26,466 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:26,532 INFO L625 ElimStorePlain]: treesize reduction 134, result has 40.2 percent of original size [2020-12-23 01:31:26,535 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 01:31:26,535 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:99, output treesize:90 [2020-12-23 01:31:26,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:31:26,975 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 69 [2020-12-23 01:31:26,977 INFO L348 Elim1Store]: treesize reduction 32, result has 84.1 percent of original size [2020-12-23 01:31:26,977 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 115 treesize of output 261 [2020-12-23 01:31:26,988 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:27,079 INFO L625 ElimStorePlain]: treesize reduction 187, result has 38.9 percent of original size [2020-12-23 01:31:27,091 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2020-12-23 01:31:27,091 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:126, output treesize:119 [2020-12-23 01:31:27,282 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:31:27,286 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:31:27,291 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:31:27,294 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 01:31:27,331 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:31:27,337 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2020-12-23 01:31:27,356 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 11 disjuncts [2020-12-23 01:31:27,422 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:31:27,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:31:27,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2020-12-23 01:31:27,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003948335] [2020-12-23 01:31:27,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-23 01:31:27,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:31:27,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-23 01:31:27,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1068, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 01:31:27,425 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 35 states. [2020-12-23 01:31:28,494 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 35 [2020-12-23 01:31:29,223 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2020-12-23 01:31:29,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:31:29,977 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2020-12-23 01:31:29,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 01:31:29,977 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 26 [2020-12-23 01:31:29,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:31:29,978 INFO L225 Difference]: With dead ends: 57 [2020-12-23 01:31:29,978 INFO L226 Difference]: Without dead ends: 43 [2020-12-23 01:31:29,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=320, Invalid=2650, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 01:31:29,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-23 01:31:29,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2020-12-23 01:31:29,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-23 01:31:29,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-12-23 01:31:29,988 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 26 [2020-12-23 01:31:29,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:31:29,989 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-12-23 01:31:29,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-23 01:31:29,989 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-12-23 01:31:29,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 01:31:29,990 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:31:29,990 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:31:30,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 01:31:30,205 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:31:30,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:31:30,206 INFO L82 PathProgramCache]: Analyzing trace with hash -2064736479, now seen corresponding path program 2 times [2020-12-23 01:31:30,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:31:30,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141149362] [2020-12-23 01:31:30,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:31:30,221 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 01:31:30,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1269541533] [2020-12-23 01:31:30,222 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 01:31:30,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:31:30,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:31:30,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 01:31:30,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:31:30,326 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-23 01:31:30,326 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:30,332 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:30,333 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:31:30,333 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2020-12-23 01:31:30,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:31:30,376 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:30,377 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 47 [2020-12-23 01:31:30,379 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:30,392 INFO L625 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2020-12-23 01:31:30,393 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:31:30,394 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:18 [2020-12-23 01:31:30,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:31:30,432 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:30,433 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 47 [2020-12-23 01:31:30,441 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:30,455 INFO L625 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2020-12-23 01:31:30,457 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:31:30,458 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2020-12-23 01:31:30,497 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2020-12-23 01:31:30,499 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:30,500 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:30,501 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:31:30,501 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2020-12-23 01:31:30,519 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:31:30,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141149362] [2020-12-23 01:31:30,520 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 01:31:30,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269541533] [2020-12-23 01:31:30,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 01:31:30,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-23 01:31:30,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247710089] [2020-12-23 01:31:30,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 01:31:30,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:31:30,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 01:31:30,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-12-23 01:31:30,523 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 11 states. [2020-12-23 01:31:30,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:31:30,722 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2020-12-23 01:31:30,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 01:31:30,722 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-12-23 01:31:30,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:31:30,724 INFO L225 Difference]: With dead ends: 49 [2020-12-23 01:31:30,724 INFO L226 Difference]: Without dead ends: 42 [2020-12-23 01:31:30,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-12-23 01:31:30,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-23 01:31:30,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-12-23 01:31:30,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-23 01:31:30,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-12-23 01:31:30,740 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 26 [2020-12-23 01:31:30,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:31:30,740 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-12-23 01:31:30,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 01:31:30,740 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-12-23 01:31:30,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 01:31:30,741 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:31:30,742 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:31:30,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:31:30,946 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:31:30,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:31:30,947 INFO L82 PathProgramCache]: Analyzing trace with hash 640571873, now seen corresponding path program 8 times [2020-12-23 01:31:30,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:31:30,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040176617] [2020-12-23 01:31:30,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:31:30,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:31:31,082 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:31:31,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040176617] [2020-12-23 01:31:31,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331763204] [2020-12-23 01:31:31,083 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 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 01:31:31,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:31:31,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:31:31,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 01:31:31,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:31:31,303 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:31:31,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:31:31,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2020-12-23 01:31:31,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509752971] [2020-12-23 01:31:31,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 01:31:31,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:31:31,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 01:31:31,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2020-12-23 01:31:31,308 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 16 states. [2020-12-23 01:31:31,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:31:31,743 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2020-12-23 01:31:31,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 01:31:31,743 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 28 [2020-12-23 01:31:31,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:31:31,744 INFO L225 Difference]: With dead ends: 49 [2020-12-23 01:31:31,745 INFO L226 Difference]: Without dead ends: 45 [2020-12-23 01:31:31,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2020-12-23 01:31:31,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-23 01:31:31,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 35. [2020-12-23 01:31:31,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-23 01:31:31,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-12-23 01:31:31,754 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 28 [2020-12-23 01:31:31,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:31:31,755 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-12-23 01:31:31,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 01:31:31,755 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-12-23 01:31:31,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 01:31:31,756 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:31:31,756 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:31:31,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:31:31,968 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:31:31,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:31:31,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1478838205, now seen corresponding path program 9 times [2020-12-23 01:31:31,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:31:31,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942047542] [2020-12-23 01:31:31,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:31:31,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:31:32,062 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:31:32,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942047542] [2020-12-23 01:31:32,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971161343] [2020-12-23 01:31:32,063 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 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 01:31:32,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-23 01:31:32,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:31:32,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 01:31:32,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:31:32,295 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:31:32,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:31:32,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2020-12-23 01:31:32,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567226998] [2020-12-23 01:31:32,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 01:31:32,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:31:32,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 01:31:32,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-12-23 01:31:32,298 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 16 states. [2020-12-23 01:31:32,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:31:32,484 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2020-12-23 01:31:32,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 01:31:32,485 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 29 [2020-12-23 01:31:32,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:31:32,486 INFO L225 Difference]: With dead ends: 53 [2020-12-23 01:31:32,486 INFO L226 Difference]: Without dead ends: 35 [2020-12-23 01:31:32,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2020-12-23 01:31:32,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-23 01:31:32,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-12-23 01:31:32,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-23 01:31:32,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-12-23 01:31:32,532 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 29 [2020-12-23 01:31:32,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:31:32,532 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-12-23 01:31:32,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 01:31:32,532 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-12-23 01:31:32,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 01:31:32,536 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:31:32,536 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:31:32,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 01:31:32,741 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:31:32,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:31:32,742 INFO L82 PathProgramCache]: Analyzing trace with hash -2018974843, now seen corresponding path program 10 times [2020-12-23 01:31:32,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:31:32,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195987327] [2020-12-23 01:31:32,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:31:32,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:31:33,650 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:31:33,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195987327] [2020-12-23 01:31:33,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006026271] [2020-12-23 01:31:33,651 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 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 01:31:33,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:31:33,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:31:33,706 WARN L261 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-23 01:31:33,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:31:33,733 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 01:31:33,734 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:33,740 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:33,745 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-23 01:31:33,746 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:33,754 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:33,755 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:31:33,755 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:23, output treesize:15 [2020-12-23 01:31:33,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:31:33,770 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 01:31:33,772 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:33,783 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:33,784 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:31:33,784 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:26 [2020-12-23 01:31:33,909 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:33,910 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 56 [2020-12-23 01:31:33,918 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:33,950 INFO L625 ElimStorePlain]: treesize reduction 20, result has 62.3 percent of original size [2020-12-23 01:31:33,952 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:31:33,952 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:33 [2020-12-23 01:31:34,133 INFO L348 Elim1Store]: treesize reduction 52, result has 45.8 percent of original size [2020-12-23 01:31:34,134 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 71 [2020-12-23 01:31:34,136 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:34,179 INFO L625 ElimStorePlain]: treesize reduction 20, result has 69.2 percent of original size [2020-12-23 01:31:34,180 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:31:34,180 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:45 [2020-12-23 01:31:34,448 INFO L348 Elim1Store]: treesize reduction 32, result has 77.5 percent of original size [2020-12-23 01:31:34,450 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 140 [2020-12-23 01:31:34,454 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:34,531 INFO L625 ElimStorePlain]: treesize reduction 64, result has 45.8 percent of original size [2020-12-23 01:31:34,532 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:31:34,533 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:58, output treesize:54 [2020-12-23 01:31:34,962 INFO L348 Elim1Store]: treesize reduction 66, result has 45.5 percent of original size [2020-12-23 01:31:34,963 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 78 treesize of output 127 [2020-12-23 01:31:34,967 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:35,025 INFO L625 ElimStorePlain]: treesize reduction 24, result has 74.7 percent of original size [2020-12-23 01:31:35,027 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 01:31:35,028 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:88, output treesize:71 [2020-12-23 01:31:35,438 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 56 [2020-12-23 01:31:35,439 INFO L348 Elim1Store]: treesize reduction 66, result has 65.4 percent of original size [2020-12-23 01:31:35,439 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 97 treesize of output 211 [2020-12-23 01:31:35,446 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:35,515 INFO L625 ElimStorePlain]: treesize reduction 70, result has 54.5 percent of original size [2020-12-23 01:31:35,517 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 01:31:35,518 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:107, output treesize:84 [2020-12-23 01:31:36,027 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 56 [2020-12-23 01:31:36,028 INFO L348 Elim1Store]: treesize reduction 66, result has 65.4 percent of original size [2020-12-23 01:31:36,028 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 99 treesize of output 213 [2020-12-23 01:31:36,037 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:36,126 INFO L625 ElimStorePlain]: treesize reduction 138, result has 41.8 percent of original size [2020-12-23 01:31:36,128 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 01:31:36,129 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:109, output treesize:99 [2020-12-23 01:31:36,732 WARN L197 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 84 [2020-12-23 01:31:36,733 INFO L348 Elim1Store]: treesize reduction 66, result has 76.2 percent of original size [2020-12-23 01:31:36,734 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 125 treesize of output 316 [2020-12-23 01:31:36,749 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:36,837 INFO L625 ElimStorePlain]: treesize reduction 64, result has 58.7 percent of original size [2020-12-23 01:31:36,845 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2020-12-23 01:31:36,845 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:135, output treesize:91 [2020-12-23 01:31:37,011 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:31:37,014 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:31:37,016 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:31:37,026 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 01:31:37,039 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:31:37,042 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2020-12-23 01:31:37,053 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 12 disjuncts [2020-12-23 01:31:37,129 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:31:37,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:31:37,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2020-12-23 01:31:37,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126194460] [2020-12-23 01:31:37,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 01:31:37,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:31:37,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 01:31:37,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1434, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 01:31:37,132 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 40 states. [2020-12-23 01:31:38,419 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2020-12-23 01:31:38,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:31:38,806 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2020-12-23 01:31:38,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 01:31:38,807 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 31 [2020-12-23 01:31:38,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:31:38,808 INFO L225 Difference]: With dead ends: 68 [2020-12-23 01:31:38,808 INFO L226 Difference]: Without dead ends: 51 [2020-12-23 01:31:38,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=191, Invalid=2065, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 01:31:38,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-23 01:31:38,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2020-12-23 01:31:38,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 01:31:38,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2020-12-23 01:31:38,820 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 31 [2020-12-23 01:31:38,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:31:38,821 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2020-12-23 01:31:38,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 01:31:38,821 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2020-12-23 01:31:38,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 01:31:38,822 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:31:38,822 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:31:39,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 01:31:39,036 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:31:39,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:31:39,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1961716541, now seen corresponding path program 3 times [2020-12-23 01:31:39,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:31:39,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746516842] [2020-12-23 01:31:39,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:31:39,047 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 01:31:39,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1284104771] [2020-12-23 01:31:39,048 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 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 01:31:39,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-23 01:31:39,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:31:39,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 01:31:39,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:31:39,151 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-23 01:31:39,152 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:39,160 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:39,161 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:31:39,161 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:20 [2020-12-23 01:31:39,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:31:39,247 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:39,247 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 51 [2020-12-23 01:31:39,249 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:39,274 INFO L625 ElimStorePlain]: treesize reduction 28, result has 47.2 percent of original size [2020-12-23 01:31:39,276 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 01:31:39,276 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:25 [2020-12-23 01:31:39,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:31:39,307 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:39,308 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 51 [2020-12-23 01:31:39,310 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:39,330 INFO L625 ElimStorePlain]: treesize reduction 20, result has 55.6 percent of original size [2020-12-23 01:31:39,335 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 01:31:39,335 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:25 [2020-12-23 01:31:39,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:31:39,370 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:39,370 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 51 [2020-12-23 01:31:39,372 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:39,396 INFO L625 ElimStorePlain]: treesize reduction 28, result has 47.2 percent of original size [2020-12-23 01:31:39,398 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 01:31:39,398 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:50, output treesize:20 [2020-12-23 01:31:39,429 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:39,430 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2020-12-23 01:31:39,432 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 01:31:39,446 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:39,447 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:31:39,449 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:31:39,450 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:34, output treesize:18 [2020-12-23 01:31:39,509 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-23 01:31:39,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746516842] [2020-12-23 01:31:39,509 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 01:31:39,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284104771] [2020-12-23 01:31:39,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 01:31:39,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-23 01:31:39,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251362904] [2020-12-23 01:31:39,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 01:31:39,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:31:39,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 01:31:39,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-12-23 01:31:39,511 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 10 states. [2020-12-23 01:31:39,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:31:39,752 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2020-12-23 01:31:39,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 01:31:39,753 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-12-23 01:31:39,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:31:39,754 INFO L225 Difference]: With dead ends: 54 [2020-12-23 01:31:39,754 INFO L226 Difference]: Without dead ends: 50 [2020-12-23 01:31:39,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-12-23 01:31:39,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-23 01:31:39,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2020-12-23 01:31:39,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 01:31:39,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2020-12-23 01:31:39,765 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 31 [2020-12-23 01:31:39,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:31:39,766 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2020-12-23 01:31:39,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 01:31:39,766 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2020-12-23 01:31:39,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 01:31:39,767 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:31:39,767 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:31:39,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 01:31:39,982 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:31:39,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:31:39,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1399241145, now seen corresponding path program 11 times [2020-12-23 01:31:39,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:31:39,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111453470] [2020-12-23 01:31:39,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:31:39,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:31:40,112 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 9 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:31:40,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111453470] [2020-12-23 01:31:40,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487474291] [2020-12-23 01:31:40,113 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:31:40,203 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 01:31:40,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:31:40,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 01:31:40,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:31:40,380 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:31:40,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:31:40,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2020-12-23 01:31:40,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495883843] [2020-12-23 01:31:40,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 01:31:40,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:31:40,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 01:31:40,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2020-12-23 01:31:40,382 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 19 states. [2020-12-23 01:31:40,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:31:40,879 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2020-12-23 01:31:40,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 01:31:40,880 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 33 [2020-12-23 01:31:40,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:31:40,881 INFO L225 Difference]: With dead ends: 62 [2020-12-23 01:31:40,881 INFO L226 Difference]: Without dead ends: 58 [2020-12-23 01:31:40,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=614, Unknown=0, NotChecked=0, Total=812 [2020-12-23 01:31:40,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-23 01:31:40,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 40. [2020-12-23 01:31:40,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-23 01:31:40,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-12-23 01:31:40,893 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 33 [2020-12-23 01:31:40,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:31:40,893 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-12-23 01:31:40,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 01:31:40,893 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-12-23 01:31:40,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 01:31:40,894 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:31:40,894 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:31:41,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:31:41,105 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:31:41,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:31:41,106 INFO L82 PathProgramCache]: Analyzing trace with hash 981485409, now seen corresponding path program 12 times [2020-12-23 01:31:41,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:31:41,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223557241] [2020-12-23 01:31:41,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:31:41,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:31:41,224 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:31:41,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223557241] [2020-12-23 01:31:41,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96903639] [2020-12-23 01:31:41,225 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:31:41,311 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-12-23 01:31:41,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:31:41,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 01:31:41,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:31:41,481 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 35 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:31:41,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:31:41,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2020-12-23 01:31:41,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109664599] [2020-12-23 01:31:41,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 01:31:41,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:31:41,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 01:31:41,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2020-12-23 01:31:41,483 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 19 states. [2020-12-23 01:31:41,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:31:41,756 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2020-12-23 01:31:41,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 01:31:41,757 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 34 [2020-12-23 01:31:41,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:31:41,758 INFO L225 Difference]: With dead ends: 66 [2020-12-23 01:31:41,758 INFO L226 Difference]: Without dead ends: 43 [2020-12-23 01:31:41,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2020-12-23 01:31:41,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-23 01:31:41,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2020-12-23 01:31:41,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-23 01:31:41,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-12-23 01:31:41,778 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 34 [2020-12-23 01:31:41,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:31:41,779 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-12-23 01:31:41,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 01:31:41,779 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-12-23 01:31:41,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-23 01:31:41,780 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:31:41,780 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:31:41,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 01:31:41,991 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:31:41,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:31:41,991 INFO L82 PathProgramCache]: Analyzing trace with hash -596322977, now seen corresponding path program 13 times [2020-12-23 01:31:41,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:31:41,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906456599] [2020-12-23 01:31:41,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:31:42,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:31:43,097 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:31:43,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906456599] [2020-12-23 01:31:43,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471517005] [2020-12-23 01:31:43,097 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:31:43,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:31:43,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 60 conjunts are in the unsatisfiable core [2020-12-23 01:31:43,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:31:43,277 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-23 01:31:43,277 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:43,286 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:43,287 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:31:43,287 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2020-12-23 01:31:43,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:31:43,364 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 01:31:43,366 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:43,378 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:43,389 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:31:43,389 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:30 [2020-12-23 01:31:43,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:31:43,548 INFO L348 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2020-12-23 01:31:43,548 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2020-12-23 01:31:43,550 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:43,568 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:43,569 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:31:43,570 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:42 [2020-12-23 01:31:43,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:31:43,788 INFO L348 Elim1Store]: treesize reduction 96, result has 20.7 percent of original size [2020-12-23 01:31:43,789 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 52 [2020-12-23 01:31:43,791 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:43,818 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:43,820 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:31:43,820 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:58, output treesize:54 [2020-12-23 01:31:44,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:31:44,124 INFO L348 Elim1Store]: treesize reduction 171, result has 17.8 percent of original size [2020-12-23 01:31:44,124 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 67 [2020-12-23 01:31:44,126 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:44,154 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:44,156 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:31:44,156 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:70, output treesize:66 [2020-12-23 01:31:44,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:31:44,475 INFO L348 Elim1Store]: treesize reduction 264, result has 15.7 percent of original size [2020-12-23 01:31:44,475 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 71 treesize of output 82 [2020-12-23 01:31:44,480 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:44,516 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:44,518 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:31:44,518 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:85, output treesize:81 [2020-12-23 01:31:45,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:31:45,182 INFO L348 Elim1Store]: treesize reduction 112, result has 38.1 percent of original size [2020-12-23 01:31:45,183 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 87 treesize of output 153 [2020-12-23 01:31:45,188 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:45,270 INFO L625 ElimStorePlain]: treesize reduction 48, result has 62.8 percent of original size [2020-12-23 01:31:45,271 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 01:31:45,272 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:98, output treesize:81 [2020-12-23 01:31:45,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:31:45,833 WARN L197 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 67 [2020-12-23 01:31:45,834 INFO L348 Elim1Store]: treesize reduction 112, result has 57.7 percent of original size [2020-12-23 01:31:45,835 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 106 treesize of output 251 [2020-12-23 01:31:45,849 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:45,974 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 47 [2020-12-23 01:31:45,976 INFO L625 ElimStorePlain]: treesize reduction 184, result has 37.0 percent of original size [2020-12-23 01:31:45,978 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 01:31:45,979 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:117, output treesize:108 [2020-12-23 01:31:46,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:31:46,797 WARN L197 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 99 [2020-12-23 01:31:46,798 INFO L348 Elim1Store]: treesize reduction 112, result has 69.3 percent of original size [2020-12-23 01:31:46,799 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 133 treesize of output 369 [2020-12-23 01:31:46,812 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:46,940 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 53 [2020-12-23 01:31:46,942 INFO L625 ElimStorePlain]: treesize reduction 138, result has 46.5 percent of original size [2020-12-23 01:31:46,944 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-23 01:31:46,944 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:144, output treesize:120 [2020-12-23 01:31:47,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:31:47,912 WARN L197 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 99 [2020-12-23 01:31:47,913 INFO L348 Elim1Store]: treesize reduction 112, result has 69.3 percent of original size [2020-12-23 01:31:47,914 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 134 treesize of output 370 [2020-12-23 01:31:47,925 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:48,070 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 52 [2020-12-23 01:31:48,071 INFO L625 ElimStorePlain]: treesize reduction 124, result has 47.9 percent of original size [2020-12-23 01:31:48,075 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-23 01:31:48,075 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:145, output treesize:114 [2020-12-23 01:31:48,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:31:48,969 WARN L197 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 99 [2020-12-23 01:31:48,970 INFO L348 Elim1Store]: treesize reduction 112, result has 69.3 percent of original size [2020-12-23 01:31:48,971 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 128 treesize of output 368 [2020-12-23 01:31:48,982 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:49,113 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 52 [2020-12-23 01:31:49,114 INFO L625 ElimStorePlain]: treesize reduction 120, result has 48.7 percent of original size [2020-12-23 01:31:49,119 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2020-12-23 01:31:49,120 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:139, output treesize:114 [2020-12-23 01:31:49,389 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:31:49,391 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:31:49,392 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:31:49,394 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:31:49,406 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:31:49,410 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 10 disjuncts [2020-12-23 01:31:49,420 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 13 disjuncts [2020-12-23 01:31:49,544 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:31:49,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:31:49,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27] total 51 [2020-12-23 01:31:49,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621006870] [2020-12-23 01:31:49,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-23 01:31:49,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:31:49,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-23 01:31:49,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=2366, Unknown=0, NotChecked=0, Total=2550 [2020-12-23 01:31:49,548 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 51 states. [2020-12-23 01:31:51,889 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 43 [2020-12-23 01:31:52,113 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-12-23 01:31:52,360 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2020-12-23 01:31:52,815 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-12-23 01:31:53,149 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2020-12-23 01:31:53,612 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2020-12-23 01:31:53,891 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2020-12-23 01:31:54,176 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2020-12-23 01:31:54,436 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-12-23 01:31:54,766 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2020-12-23 01:31:55,436 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2020-12-23 01:31:56,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:31:56,228 INFO L93 Difference]: Finished difference Result 79 states and 91 transitions. [2020-12-23 01:31:56,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 01:31:56,229 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 36 [2020-12-23 01:31:56,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:31:56,230 INFO L225 Difference]: With dead ends: 79 [2020-12-23 01:31:56,230 INFO L226 Difference]: Without dead ends: 59 [2020-12-23 01:31:56,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1808 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=476, Invalid=6004, Unknown=0, NotChecked=0, Total=6480 [2020-12-23 01:31:56,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-23 01:31:56,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2020-12-23 01:31:56,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-23 01:31:56,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2020-12-23 01:31:56,247 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 36 [2020-12-23 01:31:56,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:31:56,248 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2020-12-23 01:31:56,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-23 01:31:56,248 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2020-12-23 01:31:56,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-23 01:31:56,249 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:31:56,249 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:31:56,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 01:31:56,454 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:31:56,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:31:56,454 INFO L82 PathProgramCache]: Analyzing trace with hash 83735393, now seen corresponding path program 4 times [2020-12-23 01:31:56,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:31:56,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313186471] [2020-12-23 01:31:56,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:31:56,471 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 01:31:56,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [165446216] [2020-12-23 01:31:56,472 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 01:31:56,531 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:31:56,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:31:56,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 01:31:56,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:31:56,545 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 01:31:56,546 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:56,552 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:56,553 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:31:56,554 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-12-23 01:31:56,599 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-23 01:31:56,600 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:56,609 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:56,610 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:31:56,610 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2020-12-23 01:31:56,672 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:56,673 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 54 [2020-12-23 01:31:56,675 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:56,708 INFO L625 ElimStorePlain]: treesize reduction 22, result has 56.0 percent of original size [2020-12-23 01:31:56,709 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 01:31:56,709 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:28 [2020-12-23 01:31:56,866 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:56,867 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 91 [2020-12-23 01:31:56,870 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:56,903 INFO L625 ElimStorePlain]: treesize reduction 46, result has 40.3 percent of original size [2020-12-23 01:31:56,905 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 01:31:56,905 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:31 [2020-12-23 01:31:57,004 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:57,005 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 91 [2020-12-23 01:31:57,010 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:57,044 INFO L625 ElimStorePlain]: treesize reduction 46, result has 40.3 percent of original size [2020-12-23 01:31:57,045 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 01:31:57,045 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:31 [2020-12-23 01:31:57,146 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:57,146 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 91 [2020-12-23 01:31:57,149 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:57,184 INFO L625 ElimStorePlain]: treesize reduction 76, result has 29.0 percent of original size [2020-12-23 01:31:57,187 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 01:31:57,187 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:56, output treesize:27 [2020-12-23 01:31:57,290 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:57,291 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2020-12-23 01:31:57,292 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:31:57,298 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:31:57,299 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:31:57,300 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:33, output treesize:3 [2020-12-23 01:31:57,339 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 18 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 01:31:57,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313186471] [2020-12-23 01:31:57,339 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 01:31:57,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165446216] [2020-12-23 01:31:57,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 01:31:57,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-12-23 01:31:57,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997017001] [2020-12-23 01:31:57,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 01:31:57,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:31:57,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 01:31:57,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-12-23 01:31:57,342 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand 15 states. [2020-12-23 01:31:58,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:31:58,019 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2020-12-23 01:31:58,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 01:31:58,021 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2020-12-23 01:31:58,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:31:58,022 INFO L225 Difference]: With dead ends: 64 [2020-12-23 01:31:58,022 INFO L226 Difference]: Without dead ends: 55 [2020-12-23 01:31:58,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2020-12-23 01:31:58,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-23 01:31:58,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-12-23 01:31:58,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-23 01:31:58,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2020-12-23 01:31:58,042 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 36 [2020-12-23 01:31:58,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:31:58,042 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2020-12-23 01:31:58,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 01:31:58,042 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2020-12-23 01:31:58,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 01:31:58,044 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:31:58,044 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:31:58,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:31:58,258 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:31:58,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:31:58,259 INFO L82 PathProgramCache]: Analyzing trace with hash -746726435, now seen corresponding path program 14 times [2020-12-23 01:31:58,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:31:58,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515073695] [2020-12-23 01:31:58,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:31:58,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:31:58,477 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 16 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:31:58,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515073695] [2020-12-23 01:31:58,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910015735] [2020-12-23 01:31:58,477 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 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 01:31:58,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:31:58,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:31:58,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 01:31:58,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:31:58,766 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 25 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:31:58,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:31:58,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2020-12-23 01:31:58,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569131559] [2020-12-23 01:31:58,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 01:31:58,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:31:58,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 01:31:58,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-12-23 01:31:58,769 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 22 states. [2020-12-23 01:31:59,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:31:59,539 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2020-12-23 01:31:59,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 01:31:59,540 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 38 [2020-12-23 01:31:59,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:31:59,541 INFO L225 Difference]: With dead ends: 70 [2020-12-23 01:31:59,541 INFO L226 Difference]: Without dead ends: 66 [2020-12-23 01:31:59,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=265, Invalid=857, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 01:31:59,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-23 01:31:59,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 45. [2020-12-23 01:31:59,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-23 01:31:59,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2020-12-23 01:31:59,552 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 38 [2020-12-23 01:31:59,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:31:59,552 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2020-12-23 01:31:59,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 01:31:59,552 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2020-12-23 01:31:59,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-23 01:31:59,552 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:31:59,553 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:31:59,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:31:59,757 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:31:59,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:31:59,757 INFO L82 PathProgramCache]: Analyzing trace with hash 465948487, now seen corresponding path program 15 times [2020-12-23 01:31:59,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:31:59,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775764690] [2020-12-23 01:31:59,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:31:59,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:31:59,959 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 38 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:31:59,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775764690] [2020-12-23 01:31:59,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231377832] [2020-12-23 01:31:59,960 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 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 01:32:00,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-23 01:32:00,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:32:00,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 01:32:00,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:32:00,386 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 51 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:32:00,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:32:00,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2020-12-23 01:32:00,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818975709] [2020-12-23 01:32:00,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 01:32:00,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:32:00,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 01:32:00,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2020-12-23 01:32:00,388 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand 22 states. [2020-12-23 01:32:00,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:32:00,761 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2020-12-23 01:32:00,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 01:32:00,762 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 39 [2020-12-23 01:32:00,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:32:00,763 INFO L225 Difference]: With dead ends: 74 [2020-12-23 01:32:00,763 INFO L226 Difference]: Without dead ends: 48 [2020-12-23 01:32:00,765 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2020-12-23 01:32:00,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-23 01:32:00,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-12-23 01:32:00,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-23 01:32:00,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-12-23 01:32:00,776 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 39 [2020-12-23 01:32:00,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:32:00,777 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-12-23 01:32:00,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 01:32:00,777 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-12-23 01:32:00,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 01:32:00,777 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:32:00,777 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:32:00,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:32:00,991 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:32:00,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:32:00,992 INFO L82 PathProgramCache]: Analyzing trace with hash -552579063, now seen corresponding path program 16 times [2020-12-23 01:32:00,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:32:00,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409695691] [2020-12-23 01:32:00,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:32:01,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:32:02,686 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:32:02,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409695691] [2020-12-23 01:32:02,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068554187] [2020-12-23 01:32:02,687 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 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 01:32:02,755 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:32:02,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:32:02,758 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 63 conjunts are in the unsatisfiable core [2020-12-23 01:32:02,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:32:02,773 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 01:32:02,776 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:02,783 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:32:02,789 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-23 01:32:02,790 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:02,796 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:32:02,797 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:32:02,797 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:23, output treesize:15 [2020-12-23 01:32:02,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:02,810 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 01:32:02,812 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:02,823 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:32:02,824 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:32:02,824 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:26 [2020-12-23 01:32:02,997 INFO L348 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2020-12-23 01:32:02,997 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2020-12-23 01:32:02,999 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:03,015 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:32:03,016 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:32:03,016 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:38 [2020-12-23 01:32:03,286 INFO L348 Elim1Store]: treesize reduction 10, result has 87.7 percent of original size [2020-12-23 01:32:03,287 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 98 [2020-12-23 01:32:03,289 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:03,364 INFO L625 ElimStorePlain]: treesize reduction 42, result has 50.0 percent of original size [2020-12-23 01:32:03,365 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:32:03,365 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:42 [2020-12-23 01:32:03,705 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2020-12-23 01:32:03,706 INFO L348 Elim1Store]: treesize reduction 32, result has 77.5 percent of original size [2020-12-23 01:32:03,706 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 140 [2020-12-23 01:32:03,711 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:03,796 INFO L625 ElimStorePlain]: treesize reduction 64, result has 44.3 percent of original size [2020-12-23 01:32:03,797 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:32:03,797 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:51 [2020-12-23 01:32:04,266 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 42 [2020-12-23 01:32:04,267 INFO L348 Elim1Store]: treesize reduction 114, result has 51.7 percent of original size [2020-12-23 01:32:04,267 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 60 treesize of output 155 [2020-12-23 01:32:04,275 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:04,384 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2020-12-23 01:32:04,385 INFO L625 ElimStorePlain]: treesize reduction 64, result has 49.6 percent of original size [2020-12-23 01:32:04,385 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:32:04,386 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:67, output treesize:63 [2020-12-23 01:32:04,933 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 57 [2020-12-23 01:32:04,934 INFO L348 Elim1Store]: treesize reduction 112, result has 62.7 percent of original size [2020-12-23 01:32:04,934 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 224 [2020-12-23 01:32:04,944 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:05,092 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 40 [2020-12-23 01:32:05,092 INFO L625 ElimStorePlain]: treesize reduction 108, result has 40.0 percent of original size [2020-12-23 01:32:05,094 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:32:05,094 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:76, output treesize:72 [2020-12-23 01:32:05,949 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 46 [2020-12-23 01:32:05,950 INFO L348 Elim1Store]: treesize reduction 170, result has 32.8 percent of original size [2020-12-23 01:32:05,951 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 96 treesize of output 179 [2020-12-23 01:32:05,956 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:06,070 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2020-12-23 01:32:06,071 INFO L625 ElimStorePlain]: treesize reduction 48, result has 65.0 percent of original size [2020-12-23 01:32:06,072 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 01:32:06,073 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:106, output treesize:89 [2020-12-23 01:32:06,912 WARN L197 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 78 [2020-12-23 01:32:06,913 INFO L348 Elim1Store]: treesize reduction 170, result has 51.6 percent of original size [2020-12-23 01:32:06,914 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 115 treesize of output 291 [2020-12-23 01:32:06,921 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:06,984 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:32:06,986 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 01:32:06,986 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:125, output treesize:92 [2020-12-23 01:32:07,616 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 46 [2020-12-23 01:32:07,617 INFO L348 Elim1Store]: treesize reduction 170, result has 32.8 percent of original size [2020-12-23 01:32:07,617 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 96 treesize of output 179 [2020-12-23 01:32:07,624 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:07,741 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2020-12-23 01:32:07,742 INFO L625 ElimStorePlain]: treesize reduction 118, result has 43.5 percent of original size [2020-12-23 01:32:07,743 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 01:32:07,743 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:106, output treesize:91 [2020-12-23 01:32:08,652 WARN L197 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 78 [2020-12-23 01:32:08,654 INFO L348 Elim1Store]: treesize reduction 170, result has 51.6 percent of original size [2020-12-23 01:32:08,654 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 117 treesize of output 293 [2020-12-23 01:32:08,660 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:08,790 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2020-12-23 01:32:08,790 INFO L625 ElimStorePlain]: treesize reduction 24, result has 81.0 percent of original size [2020-12-23 01:32:08,792 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 01:32:08,792 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:127, output treesize:102 [2020-12-23 01:32:09,134 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2020-12-23 01:32:09,750 WARN L197 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 78 [2020-12-23 01:32:09,751 INFO L348 Elim1Store]: treesize reduction 170, result has 51.6 percent of original size [2020-12-23 01:32:09,752 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 117 treesize of output 293 [2020-12-23 01:32:09,760 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:09,904 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2020-12-23 01:32:09,905 INFO L625 ElimStorePlain]: treesize reduction 20, result has 83.1 percent of original size [2020-12-23 01:32:09,907 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 01:32:09,907 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:127, output treesize:98 [2020-12-23 01:32:10,411 WARN L197 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2020-12-23 01:32:10,825 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 46 [2020-12-23 01:32:10,826 INFO L348 Elim1Store]: treesize reduction 170, result has 32.8 percent of original size [2020-12-23 01:32:10,826 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 96 treesize of output 179 [2020-12-23 01:32:10,832 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:10,952 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-12-23 01:32:10,953 INFO L625 ElimStorePlain]: treesize reduction 72, result has 55.8 percent of original size [2020-12-23 01:32:10,956 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-23 01:32:10,957 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:106, output treesize:91 [2020-12-23 01:32:11,302 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:32:11,304 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:32:11,305 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:32:11,307 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:32:11,314 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:32:11,316 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2020-12-23 01:32:11,323 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 12 disjuncts [2020-12-23 01:32:11,490 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:32:11,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:32:11,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 56 [2020-12-23 01:32:11,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727203310] [2020-12-23 01:32:11,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-23 01:32:11,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:32:11,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-23 01:32:11,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=2900, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 01:32:11,493 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 56 states. [2020-12-23 01:32:13,244 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2020-12-23 01:32:13,477 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2020-12-23 01:32:13,790 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2020-12-23 01:32:14,387 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2020-12-23 01:32:14,854 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-12-23 01:32:15,380 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-12-23 01:32:15,876 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2020-12-23 01:32:16,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:32:16,937 INFO L93 Difference]: Finished difference Result 90 states and 102 transitions. [2020-12-23 01:32:16,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 01:32:16,941 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 41 [2020-12-23 01:32:16,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:32:16,942 INFO L225 Difference]: With dead ends: 90 [2020-12-23 01:32:16,942 INFO L226 Difference]: Without dead ends: 67 [2020-12-23 01:32:16,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 15 SyntacticMatches, 6 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1134 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=261, Invalid=4029, Unknown=0, NotChecked=0, Total=4290 [2020-12-23 01:32:16,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-23 01:32:16,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2020-12-23 01:32:16,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-23 01:32:16,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2020-12-23 01:32:16,956 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 41 [2020-12-23 01:32:16,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:32:16,956 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2020-12-23 01:32:16,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-23 01:32:16,957 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2020-12-23 01:32:16,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 01:32:16,957 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:32:16,957 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:32:17,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 01:32:17,158 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:32:17,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:32:17,159 INFO L82 PathProgramCache]: Analyzing trace with hash 127479307, now seen corresponding path program 5 times [2020-12-23 01:32:17,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:32:17,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212648649] [2020-12-23 01:32:17,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:32:17,170 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 01:32:17,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1854156807] [2020-12-23 01:32:17,171 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 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 01:32:17,325 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-23 01:32:17,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:32:17,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 01:32:17,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:32:17,423 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-23 01:32:17,424 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:17,436 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:32:17,437 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:32:17,438 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2020-12-23 01:32:17,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:17,507 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2020-12-23 01:32:17,508 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:17,525 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:32:17,530 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 01:32:17,530 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:30 [2020-12-23 01:32:17,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:17,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:17,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:17,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:17,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:17,700 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:32:17,700 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 46 treesize of output 101 [2020-12-23 01:32:17,703 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:32:17,709 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:17,786 INFO L625 ElimStorePlain]: treesize reduction 45, result has 55.0 percent of original size [2020-12-23 01:32:17,792 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 01:32:17,792 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:58, output treesize:55 [2020-12-23 01:32:18,130 WARN L197 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-12-23 01:32:18,209 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-23 01:32:18,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:18,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:18,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:18,281 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 47 [2020-12-23 01:32:18,285 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:18,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:18,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:18,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:18,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:18,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:18,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:18,359 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:32:18,359 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 47 [2020-12-23 01:32:18,362 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:18,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:18,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:18,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:18,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:18,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:18,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:18,390 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:32:18,391 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 52 [2020-12-23 01:32:18,392 INFO L547 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:18,495 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-12-23 01:32:18,496 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:32:18,499 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 3 xjuncts. [2020-12-23 01:32:18,499 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:198, output treesize:133 [2020-12-23 01:32:19,457 WARN L197 SmtUtils]: Spent 882.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-12-23 01:32:19,702 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-23 01:32:19,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:19,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:19,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:19,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:19,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:19,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:19,771 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:32:19,772 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 47 [2020-12-23 01:32:19,773 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:19,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:19,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:19,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:19,823 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 47 [2020-12-23 01:32:19,825 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:19,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:19,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:19,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:19,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:19,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:19,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:19,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:19,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:19,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:19,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:19,854 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:32:19,854 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 66 treesize of output 66 [2020-12-23 01:32:19,856 INFO L547 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:19,947 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:32:19,951 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 3 xjuncts. [2020-12-23 01:32:19,952 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:209, output treesize:143 [2020-12-23 01:32:20,130 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-12-23 01:32:20,352 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-12-23 01:32:20,370 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-23 01:32:20,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:20,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:20,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:20,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:20,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:20,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:20,449 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:32:20,450 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 47 [2020-12-23 01:32:20,452 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:20,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:20,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:20,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:20,501 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 47 [2020-12-23 01:32:20,508 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:20,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:20,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:20,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:20,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:20,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:20,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:20,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:20,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:20,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:20,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:20,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:20,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:20,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:20,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:20,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:20,546 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:32:20,546 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 76 treesize of output 79 [2020-12-23 01:32:20,550 INFO L547 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:20,645 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:32:20,652 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: 5 dim-0 vars, and 3 xjuncts. [2020-12-23 01:32:20,653 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:219, output treesize:133 [2020-12-23 01:32:20,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:20,921 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:32:20,921 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 10 [2020-12-23 01:32:20,924 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:20,933 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:32:20,936 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:32:20,937 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:36, output treesize:3 [2020-12-23 01:32:21,010 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 23 proven. 62 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 01:32:21,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212648649] [2020-12-23 01:32:21,010 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 01:32:21,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854156807] [2020-12-23 01:32:21,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 01:32:21,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-12-23 01:32:21,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254531445] [2020-12-23 01:32:21,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 01:32:21,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:32:21,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 01:32:21,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-12-23 01:32:21,012 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand 20 states. [2020-12-23 01:32:22,466 WARN L197 SmtUtils]: Spent 611.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2020-12-23 01:32:22,815 WARN L197 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2020-12-23 01:32:23,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:32:23,032 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2020-12-23 01:32:23,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 01:32:23,033 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 41 [2020-12-23 01:32:23,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:32:23,034 INFO L225 Difference]: With dead ends: 81 [2020-12-23 01:32:23,034 INFO L226 Difference]: Without dead ends: 72 [2020-12-23 01:32:23,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2020-12-23 01:32:23,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-23 01:32:23,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 62. [2020-12-23 01:32:23,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-23 01:32:23,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2020-12-23 01:32:23,052 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 41 [2020-12-23 01:32:23,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:32:23,053 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2020-12-23 01:32:23,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 01:32:23,053 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2020-12-23 01:32:23,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-23 01:32:23,054 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:32:23,054 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:32:23,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 01:32:23,266 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:32:23,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:32:23,266 INFO L82 PathProgramCache]: Analyzing trace with hash -105011125, now seen corresponding path program 17 times [2020-12-23 01:32:23,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:32:23,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973065247] [2020-12-23 01:32:23,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:32:23,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:32:23,522 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 25 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:32:23,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973065247] [2020-12-23 01:32:23,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131120590] [2020-12-23 01:32:23,523 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 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 01:32:23,698 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-12-23 01:32:23,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:32:23,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 01:32:23,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:32:23,970 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 36 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:32:23,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:32:23,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2020-12-23 01:32:23,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544017287] [2020-12-23 01:32:23,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 01:32:23,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:32:23,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 01:32:23,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2020-12-23 01:32:23,974 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand 25 states. [2020-12-23 01:32:25,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:32:25,137 INFO L93 Difference]: Finished difference Result 78 states and 85 transitions. [2020-12-23 01:32:25,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 01:32:25,139 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 43 [2020-12-23 01:32:25,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:32:25,140 INFO L225 Difference]: With dead ends: 78 [2020-12-23 01:32:25,140 INFO L226 Difference]: Without dead ends: 74 [2020-12-23 01:32:25,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=342, Invalid=1140, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 01:32:25,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-23 01:32:25,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 50. [2020-12-23 01:32:25,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-23 01:32:25,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2020-12-23 01:32:25,153 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 43 [2020-12-23 01:32:25,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:32:25,153 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2020-12-23 01:32:25,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 01:32:25,153 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2020-12-23 01:32:25,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-23 01:32:25,153 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:32:25,153 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:32:25,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:32:25,354 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:32:25,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:32:25,355 INFO L82 PathProgramCache]: Analyzing trace with hash -2029167523, now seen corresponding path program 18 times [2020-12-23 01:32:25,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:32:25,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393762281] [2020-12-23 01:32:25,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:32:25,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:32:25,586 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 54 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:32:25,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393762281] [2020-12-23 01:32:25,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315889660] [2020-12-23 01:32:25,587 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 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 01:32:25,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-12-23 01:32:25,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:32:25,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 01:32:25,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:32:26,052 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 70 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:32:26,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:32:26,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2020-12-23 01:32:26,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775944805] [2020-12-23 01:32:26,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 01:32:26,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:32:26,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 01:32:26,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2020-12-23 01:32:26,054 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand 25 states. [2020-12-23 01:32:26,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:32:26,566 INFO L93 Difference]: Finished difference Result 82 states and 90 transitions. [2020-12-23 01:32:26,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 01:32:26,567 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 44 [2020-12-23 01:32:26,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:32:26,568 INFO L225 Difference]: With dead ends: 82 [2020-12-23 01:32:26,568 INFO L226 Difference]: Without dead ends: 53 [2020-12-23 01:32:26,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=247, Invalid=745, Unknown=0, NotChecked=0, Total=992 [2020-12-23 01:32:26,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-23 01:32:26,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2020-12-23 01:32:26,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-23 01:32:26,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-12-23 01:32:26,583 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 44 [2020-12-23 01:32:26,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:32:26,583 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-12-23 01:32:26,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 01:32:26,583 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-12-23 01:32:26,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 01:32:26,584 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:32:26,584 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:32:26,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-23 01:32:26,799 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:32:26,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:32:26,800 INFO L82 PathProgramCache]: Analyzing trace with hash -111213349, now seen corresponding path program 19 times [2020-12-23 01:32:26,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:32:26,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872396618] [2020-12-23 01:32:26,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:32:26,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:32:29,807 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:32:29,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872396618] [2020-12-23 01:32:29,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086702539] [2020-12-23 01:32:29,808 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 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 01:32:29,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:32:29,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 76 conjunts are in the unsatisfiable core [2020-12-23 01:32:29,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:32:30,072 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-23 01:32:30,073 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:30,086 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:32:30,087 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:32:30,088 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2020-12-23 01:32:30,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:30,197 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 01:32:30,198 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:30,219 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:32:30,220 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:32:30,220 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:30 [2020-12-23 01:32:30,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:30,484 INFO L348 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2020-12-23 01:32:30,484 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2020-12-23 01:32:30,486 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:30,508 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:32:30,509 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:32:30,509 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:42 [2020-12-23 01:32:30,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:30,946 INFO L348 Elim1Store]: treesize reduction 10, result has 87.7 percent of original size [2020-12-23 01:32:30,946 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 98 [2020-12-23 01:32:30,949 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:31,042 INFO L625 ElimStorePlain]: treesize reduction 42, result has 52.3 percent of original size [2020-12-23 01:32:31,044 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:32:31,045 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:46 [2020-12-23 01:32:31,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:31,512 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 32 [2020-12-23 01:32:31,513 INFO L348 Elim1Store]: treesize reduction 77, result has 51.9 percent of original size [2020-12-23 01:32:31,513 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 113 [2020-12-23 01:32:31,516 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:31,614 INFO L625 ElimStorePlain]: treesize reduction 42, result has 58.0 percent of original size [2020-12-23 01:32:31,615 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:32:31,616 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:62, output treesize:58 [2020-12-23 01:32:32,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:32,208 WARN L197 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 47 [2020-12-23 01:32:32,209 INFO L348 Elim1Store]: treesize reduction 66, result has 69.3 percent of original size [2020-12-23 01:32:32,209 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 182 [2020-12-23 01:32:32,212 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:32,354 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2020-12-23 01:32:32,355 INFO L625 ElimStorePlain]: treesize reduction 86, result has 42.7 percent of original size [2020-12-23 01:32:32,356 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:32:32,357 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:64 [2020-12-23 01:32:32,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:33,096 WARN L197 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 52 [2020-12-23 01:32:33,097 INFO L348 Elim1Store]: treesize reduction 163, result has 49.7 percent of original size [2020-12-23 01:32:33,098 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 69 treesize of output 197 [2020-12-23 01:32:33,102 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:33,267 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2020-12-23 01:32:33,269 INFO L625 ElimStorePlain]: treesize reduction 86, result has 46.9 percent of original size [2020-12-23 01:32:33,271 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:32:33,272 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:80, output treesize:76 [2020-12-23 01:32:33,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:34,075 WARN L197 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 57 [2020-12-23 01:32:34,076 INFO L348 Elim1Store]: treesize reduction 278, result has 38.4 percent of original size [2020-12-23 01:32:34,076 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 81 treesize of output 212 [2020-12-23 01:32:34,081 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:34,254 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2020-12-23 01:32:34,255 INFO L625 ElimStorePlain]: treesize reduction 86, result has 51.4 percent of original size [2020-12-23 01:32:34,257 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:32:34,257 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:95, output treesize:91 [2020-12-23 01:32:35,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:35,742 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 53 [2020-12-23 01:32:35,743 INFO L348 Elim1Store]: treesize reduction 240, result has 28.8 percent of original size [2020-12-23 01:32:35,743 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 105 treesize of output 205 [2020-12-23 01:32:35,750 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:35,898 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-12-23 01:32:35,899 INFO L625 ElimStorePlain]: treesize reduction 70, result has 58.6 percent of original size [2020-12-23 01:32:35,900 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 01:32:35,901 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:116, output treesize:99 [2020-12-23 01:32:36,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:37,133 WARN L197 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 89 [2020-12-23 01:32:37,135 INFO L348 Elim1Store]: treesize reduction 240, result has 46.5 percent of original size [2020-12-23 01:32:37,135 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 124 treesize of output 331 [2020-12-23 01:32:37,145 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:37,365 WARN L197 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 57 [2020-12-23 01:32:37,366 INFO L625 ElimStorePlain]: treesize reduction 242, result has 34.2 percent of original size [2020-12-23 01:32:37,368 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 01:32:37,368 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:135, output treesize:126 [2020-12-23 01:32:38,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:39,047 WARN L197 SmtUtils]: Spent 796.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 129 [2020-12-23 01:32:39,048 INFO L348 Elim1Store]: treesize reduction 240, result has 58.4 percent of original size [2020-12-23 01:32:39,049 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 45 case distinctions, treesize of input 151 treesize of output 477 [2020-12-23 01:32:39,061 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:39,351 WARN L197 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 61 [2020-12-23 01:32:39,352 INFO L625 ElimStorePlain]: treesize reduction 300, result has 31.8 percent of original size [2020-12-23 01:32:39,354 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-23 01:32:39,354 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:162, output treesize:140 [2020-12-23 01:32:40,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:41,481 WARN L197 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 257 DAG size of output: 173 [2020-12-23 01:32:41,482 INFO L348 Elim1Store]: treesize reduction 240, result has 66.7 percent of original size [2020-12-23 01:32:41,483 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 1 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 55 case distinctions, treesize of input 165 treesize of output 634 [2020-12-23 01:32:41,504 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:41,727 WARN L197 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 69 [2020-12-23 01:32:41,728 INFO L625 ElimStorePlain]: treesize reduction 138, result has 51.9 percent of original size [2020-12-23 01:32:41,731 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-12-23 01:32:41,731 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:176, output treesize:149 [2020-12-23 01:32:42,310 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2020-12-23 01:32:42,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:43,665 WARN L197 SmtUtils]: Spent 714.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 129 [2020-12-23 01:32:43,666 INFO L348 Elim1Store]: treesize reduction 240, result has 58.4 percent of original size [2020-12-23 01:32:43,666 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 45 case distinctions, treesize of input 152 treesize of output 478 [2020-12-23 01:32:43,677 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:43,943 WARN L197 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 62 [2020-12-23 01:32:43,944 INFO L625 ElimStorePlain]: treesize reduction 366, result has 27.8 percent of original size [2020-12-23 01:32:43,946 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-23 01:32:43,946 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:163, output treesize:141 [2020-12-23 01:32:45,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:46,073 WARN L197 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 257 DAG size of output: 173 [2020-12-23 01:32:46,074 INFO L348 Elim1Store]: treesize reduction 240, result has 66.7 percent of original size [2020-12-23 01:32:46,075 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 1 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 55 case distinctions, treesize of input 166 treesize of output 635 [2020-12-23 01:32:46,091 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:46,348 WARN L197 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 68 [2020-12-23 01:32:46,348 INFO L625 ElimStorePlain]: treesize reduction 360, result has 31.7 percent of original size [2020-12-23 01:32:46,352 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-12-23 01:32:46,353 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:177, output treesize:167 [2020-12-23 01:32:47,021 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2020-12-23 01:32:47,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:32:48,782 WARN L197 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 257 DAG size of output: 173 [2020-12-23 01:32:48,784 INFO L348 Elim1Store]: treesize reduction 240, result has 66.7 percent of original size [2020-12-23 01:32:48,785 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 1 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 55 case distinctions, treesize of input 181 treesize of output 638 [2020-12-23 01:32:48,800 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:32:49,140 WARN L197 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 67 [2020-12-23 01:32:49,143 INFO L625 ElimStorePlain]: treesize reduction 216, result has 39.8 percent of original size [2020-12-23 01:32:49,150 INFO L547 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2020-12-23 01:32:49,151 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:192, output treesize:143 [2020-12-23 01:32:49,687 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:32:49,690 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:32:49,691 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:32:49,694 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:32:49,708 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:32:49,712 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 13 disjuncts [2020-12-23 01:32:49,730 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 16 disjuncts [2020-12-23 01:32:49,999 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:32:49,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:32:50,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 68 [2020-12-23 01:32:50,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339773296] [2020-12-23 01:32:50,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-12-23 01:32:50,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:32:50,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-12-23 01:32:50,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=4307, Unknown=0, NotChecked=0, Total=4556 [2020-12-23 01:32:50,002 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 68 states. [2020-12-23 01:32:52,459 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2020-12-23 01:32:52,716 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2020-12-23 01:32:53,205 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2020-12-23 01:32:53,489 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2020-12-23 01:32:53,930 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-12-23 01:32:54,272 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2020-12-23 01:32:54,650 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-12-23 01:32:55,372 WARN L197 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 52 [2020-12-23 01:32:55,792 WARN L197 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2020-12-23 01:32:56,293 WARN L197 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2020-12-23 01:32:56,721 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2020-12-23 01:32:57,296 WARN L197 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2020-12-23 01:32:58,005 WARN L197 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 64 [2020-12-23 01:32:58,486 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-12-23 01:32:59,110 WARN L197 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2020-12-23 01:32:59,780 WARN L197 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 68 [2020-12-23 01:33:00,281 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2020-12-23 01:33:00,756 WARN L197 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2020-12-23 01:33:01,318 WARN L197 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 67 [2020-12-23 01:33:01,709 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2020-12-23 01:33:02,139 WARN L197 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 69 [2020-12-23 01:33:02,678 WARN L197 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 69 [2020-12-23 01:33:03,053 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2020-12-23 01:33:03,530 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 72 [2020-12-23 01:33:04,080 WARN L197 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 71 [2020-12-23 01:33:04,921 WARN L197 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2020-12-23 01:33:05,541 WARN L197 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 73 [2020-12-23 01:33:06,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:33:06,466 INFO L93 Difference]: Finished difference Result 101 states and 113 transitions. [2020-12-23 01:33:06,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-23 01:33:06,467 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 46 [2020-12-23 01:33:06,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:33:06,468 INFO L225 Difference]: With dead ends: 101 [2020-12-23 01:33:06,468 INFO L226 Difference]: Without dead ends: 75 [2020-12-23 01:33:06,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 15 SyntacticMatches, 7 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3347 ImplicationChecksByTransitivity, 24.9s TimeCoverageRelationStatistics Valid=675, Invalid=10881, Unknown=0, NotChecked=0, Total=11556 [2020-12-23 01:33:06,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-23 01:33:06,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 67. [2020-12-23 01:33:06,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-23 01:33:06,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2020-12-23 01:33:06,492 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 46 [2020-12-23 01:33:06,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:33:06,492 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2020-12-23 01:33:06,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-12-23 01:33:06,492 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2020-12-23 01:33:06,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 01:33:06,493 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:33:06,493 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:33:06,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:33:06,694 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:33:06,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:33:06,695 INFO L82 PathProgramCache]: Analyzing trace with hash 568845021, now seen corresponding path program 6 times [2020-12-23 01:33:06,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:33:06,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623693802] [2020-12-23 01:33:06,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:33:06,706 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 01:33:06,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1727251576] [2020-12-23 01:33:06,706 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 01:33:06,892 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-12-23 01:33:06,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:33:06,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 01:33:06,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:33:06,934 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-23 01:33:06,935 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:33:06,947 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:33:06,948 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:33:06,948 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-12-23 01:33:07,003 INFO L348 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2020-12-23 01:33:07,003 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2020-12-23 01:33:07,005 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:33:07,021 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:33:07,022 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:33:07,022 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2020-12-23 01:33:07,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:33:07,258 INFO L348 Elim1Store]: treesize reduction 17, result has 66.7 percent of original size [2020-12-23 01:33:07,259 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 83 [2020-12-23 01:33:07,262 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:33:07,304 INFO L625 ElimStorePlain]: treesize reduction 50, result has 42.5 percent of original size [2020-12-23 01:33:07,305 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 01:33:07,305 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:37 [2020-12-23 01:33:07,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:33:07,361 INFO L348 Elim1Store]: treesize reduction 17, result has 66.7 percent of original size [2020-12-23 01:33:07,362 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 83 [2020-12-23 01:33:07,364 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:33:07,403 INFO L625 ElimStorePlain]: treesize reduction 50, result has 42.5 percent of original size [2020-12-23 01:33:07,404 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 01:33:07,404 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:37 [2020-12-23 01:33:07,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:33:07,461 INFO L348 Elim1Store]: treesize reduction 17, result has 66.7 percent of original size [2020-12-23 01:33:07,461 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 83 [2020-12-23 01:33:07,463 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:33:07,505 INFO L625 ElimStorePlain]: treesize reduction 50, result has 42.5 percent of original size [2020-12-23 01:33:07,506 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 01:33:07,507 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:37 [2020-12-23 01:33:07,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:33:07,563 INFO L348 Elim1Store]: treesize reduction 17, result has 66.7 percent of original size [2020-12-23 01:33:07,563 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 83 [2020-12-23 01:33:07,565 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:33:07,616 INFO L625 ElimStorePlain]: treesize reduction 59, result has 38.5 percent of original size [2020-12-23 01:33:07,618 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 01:33:07,618 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:37 [2020-12-23 01:33:07,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:33:07,691 INFO L348 Elim1Store]: treesize reduction 17, result has 66.7 percent of original size [2020-12-23 01:33:07,692 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 83 [2020-12-23 01:33:07,694 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:33:07,746 INFO L625 ElimStorePlain]: treesize reduction 51, result has 42.0 percent of original size [2020-12-23 01:33:07,748 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 01:33:07,749 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:62, output treesize:32 [2020-12-23 01:33:07,847 INFO L348 Elim1Store]: treesize reduction 17, result has 66.7 percent of original size [2020-12-23 01:33:07,848 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 43 [2020-12-23 01:33:07,850 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:33:07,880 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:33:07,882 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 01:33:07,883 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:33:07,886 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 01:33:07,888 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 4 xjuncts. [2020-12-23 01:33:07,888 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:43, output treesize:56 [2020-12-23 01:33:08,075 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 23 proven. 45 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-23 01:33:08,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623693802] [2020-12-23 01:33:08,076 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 01:33:08,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727251576] [2020-12-23 01:33:08,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 01:33:08,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-12-23 01:33:08,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508756104] [2020-12-23 01:33:08,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 01:33:08,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:33:08,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 01:33:08,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-12-23 01:33:08,077 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand 14 states. [2020-12-23 01:33:09,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:33:09,037 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2020-12-23 01:33:09,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 01:33:09,040 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 46 [2020-12-23 01:33:09,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:33:09,041 INFO L225 Difference]: With dead ends: 81 [2020-12-23 01:33:09,041 INFO L226 Difference]: Without dead ends: 77 [2020-12-23 01:33:09,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=126, Invalid=380, Unknown=0, NotChecked=0, Total=506 [2020-12-23 01:33:09,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-23 01:33:09,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 67. [2020-12-23 01:33:09,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-23 01:33:09,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2020-12-23 01:33:09,058 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 46 [2020-12-23 01:33:09,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:33:09,059 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2020-12-23 01:33:09,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 01:33:09,059 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2020-12-23 01:33:09,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-23 01:33:09,059 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:33:09,060 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:33:09,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 01:33:09,262 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:33:09,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:33:09,263 INFO L82 PathProgramCache]: Analyzing trace with hash 501777881, now seen corresponding path program 20 times [2020-12-23 01:33:09,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:33:09,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199558808] [2020-12-23 01:33:09,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:33:09,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:33:09,629 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 36 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:33:09,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199558808] [2020-12-23 01:33:09,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236390491] [2020-12-23 01:33:09,629 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 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 01:33:09,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:33:09,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:33:09,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 01:33:09,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:33:10,015 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 49 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:33:10,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:33:10,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2020-12-23 01:33:10,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096049197] [2020-12-23 01:33:10,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 01:33:10,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:33:10,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 01:33:10,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2020-12-23 01:33:10,017 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand 28 states. [2020-12-23 01:33:11,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:33:11,358 INFO L93 Difference]: Finished difference Result 98 states and 110 transitions. [2020-12-23 01:33:11,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 01:33:11,360 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 48 [2020-12-23 01:33:11,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:33:11,361 INFO L225 Difference]: With dead ends: 98 [2020-12-23 01:33:11,361 INFO L226 Difference]: Without dead ends: 94 [2020-12-23 01:33:11,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=429, Invalid=1463, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 01:33:11,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-23 01:33:11,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 55. [2020-12-23 01:33:11,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-23 01:33:11,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2020-12-23 01:33:11,377 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 48 [2020-12-23 01:33:11,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:33:11,377 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2020-12-23 01:33:11,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 01:33:11,377 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2020-12-23 01:33:11,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-23 01:33:11,377 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:33:11,378 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:33:11,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 01:33:11,586 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:33:11,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:33:11,587 INFO L82 PathProgramCache]: Analyzing trace with hash -198074805, now seen corresponding path program 21 times [2020-12-23 01:33:11,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:33:11,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603476415] [2020-12-23 01:33:11,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:33:11,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:33:11,981 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 73 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:33:11,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603476415] [2020-12-23 01:33:11,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689238090] [2020-12-23 01:33:11,981 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 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 01:33:12,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-23 01:33:12,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:33:12,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 01:33:12,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:33:12,639 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 92 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:33:12,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:33:12,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2020-12-23 01:33:12,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997234523] [2020-12-23 01:33:12,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 01:33:12,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:33:12,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 01:33:12,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2020-12-23 01:33:12,641 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand 28 states. [2020-12-23 01:33:13,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:33:13,302 INFO L93 Difference]: Finished difference Result 102 states and 115 transitions. [2020-12-23 01:33:13,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 01:33:13,304 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 49 [2020-12-23 01:33:13,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:33:13,305 INFO L225 Difference]: With dead ends: 102 [2020-12-23 01:33:13,305 INFO L226 Difference]: Without dead ends: 65 [2020-12-23 01:33:13,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=309, Invalid=951, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 01:33:13,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-23 01:33:13,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 52. [2020-12-23 01:33:13,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-23 01:33:13,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2020-12-23 01:33:13,319 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 49 [2020-12-23 01:33:13,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:33:13,319 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2020-12-23 01:33:13,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 01:33:13,319 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2020-12-23 01:33:13,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-23 01:33:13,319 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:33:13,319 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:33:13,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 01:33:13,520 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:33:13,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:33:13,521 INFO L82 PathProgramCache]: Analyzing trace with hash -777284467, now seen corresponding path program 22 times [2020-12-23 01:33:13,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:33:13,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826753364] [2020-12-23 01:33:13,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:33:13,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:33:16,956 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:33:16,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826753364] [2020-12-23 01:33:16,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841666668] [2020-12-23 01:33:16,957 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 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 01:33:17,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:33:17,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:33:17,022 WARN L261 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 79 conjunts are in the unsatisfiable core [2020-12-23 01:33:17,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:33:17,037 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 01:33:17,040 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:33:17,051 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:33:17,056 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-23 01:33:17,058 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 01:33:17,068 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:33:17,069 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:33:17,070 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:23, output treesize:15 [2020-12-23 01:33:17,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:33:17,084 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 01:33:17,086 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:33:17,105 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:33:17,106 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:33:17,106 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:26 [2020-12-23 01:33:17,384 INFO L348 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2020-12-23 01:33:17,384 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2020-12-23 01:33:17,386 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:33:17,410 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:33:17,411 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:33:17,411 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:38 [2020-12-23 01:33:17,880 INFO L348 Elim1Store]: treesize reduction 10, result has 87.7 percent of original size [2020-12-23 01:33:17,881 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 98 [2020-12-23 01:33:17,884 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:33:17,993 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2020-12-23 01:33:17,994 INFO L625 ElimStorePlain]: treesize reduction 42, result has 50.0 percent of original size [2020-12-23 01:33:17,995 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:33:17,995 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:42 [2020-12-23 01:33:18,631 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2020-12-23 01:33:18,632 INFO L348 Elim1Store]: treesize reduction 32, result has 77.5 percent of original size [2020-12-23 01:33:18,633 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 140 [2020-12-23 01:33:18,636 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:33:18,801 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 31 [2020-12-23 01:33:18,802 INFO L625 ElimStorePlain]: treesize reduction 64, result has 44.3 percent of original size [2020-12-23 01:33:18,803 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:33:18,803 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:51 [2020-12-23 01:33:19,680 WARN L197 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 47 [2020-12-23 01:33:19,681 INFO L348 Elim1Store]: treesize reduction 66, result has 69.3 percent of original size [2020-12-23 01:33:19,682 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 182 [2020-12-23 01:33:19,687 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:33:19,899 WARN L197 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 34 [2020-12-23 01:33:19,900 INFO L625 ElimStorePlain]: treesize reduction 86, result has 41.1 percent of original size [2020-12-23 01:33:19,901 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:33:19,901 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:64, output treesize:60 [2020-12-23 01:33:21,207 WARN L197 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 57 [2020-12-23 01:33:21,209 INFO L348 Elim1Store]: treesize reduction 112, result has 62.7 percent of original size [2020-12-23 01:33:21,209 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 224 [2020-12-23 01:33:21,215 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:33:21,471 WARN L197 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 38 [2020-12-23 01:33:21,472 INFO L625 ElimStorePlain]: treesize reduction 108, result has 39.0 percent of original size [2020-12-23 01:33:21,473 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:33:21,474 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:73, output treesize:69 [2020-12-23 01:33:22,797 WARN L197 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 62 [2020-12-23 01:33:22,798 INFO L348 Elim1Store]: treesize reduction 224, result has 47.2 percent of original size [2020-12-23 01:33:22,798 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 78 treesize of output 239 [2020-12-23 01:33:22,803 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:33:23,070 WARN L197 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 43 [2020-12-23 01:33:23,071 INFO L625 ElimStorePlain]: treesize reduction 108, result has 42.9 percent of original size [2020-12-23 01:33:23,072 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:33:23,072 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:85, output treesize:81 [2020-12-23 01:33:24,628 WARN L197 SmtUtils]: Spent 529.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 77 [2020-12-23 01:33:24,629 INFO L348 Elim1Store]: treesize reduction 240, result has 52.6 percent of original size [2020-12-23 01:33:24,629 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 84 treesize of output 308 [2020-12-23 01:33:24,635 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:33:24,964 WARN L197 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2020-12-23 01:33:24,965 INFO L625 ElimStorePlain]: treesize reduction 152, result has 37.2 percent of original size [2020-12-23 01:33:24,966 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:33:24,966 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:94, output treesize:90 [2020-12-23 01:33:25,551 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-12-23 01:33:27,605 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-12-23 01:33:27,864 WARN L197 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 60 [2020-12-23 01:33:27,865 INFO L348 Elim1Store]: treesize reduction 322, result has 25.6 percent of original size [2020-12-23 01:33:27,865 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 114 treesize of output 231 [2020-12-23 01:33:27,872 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:33:28,143 WARN L197 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 52 [2020-12-23 01:33:28,145 INFO L625 ElimStorePlain]: treesize reduction 94, result has 53.2 percent of original size [2020-12-23 01:33:28,146 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 01:33:28,147 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:124, output treesize:107 [2020-12-23 01:33:29,776 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-12-23 01:33:30,348 WARN L197 SmtUtils]: Spent 552.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 100 [2020-12-23 01:33:30,349 INFO L348 Elim1Store]: treesize reduction 322, result has 42.4 percent of original size [2020-12-23 01:33:30,350 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 45 case distinctions, treesize of input 133 treesize of output 371 [2020-12-23 01:33:30,359 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:33:30,643 WARN L197 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 59 [2020-12-23 01:33:30,644 INFO L625 ElimStorePlain]: treesize reduction 130, result has 50.8 percent of original size [2020-12-23 01:33:30,645 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 01:33:30,646 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:143, output treesize:134 [2020-12-23 01:33:31,369 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-12-23 01:33:32,326 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-12-23 01:33:33,289 WARN L197 SmtUtils]: Spent 942.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 144 [2020-12-23 01:33:33,290 INFO L348 Elim1Store]: treesize reduction 322, result has 54.1 percent of original size [2020-12-23 01:33:33,291 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 1 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 55 case distinctions, treesize of input 160 treesize of output 531 [2020-12-23 01:33:33,303 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:33:33,658 WARN L197 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 65 [2020-12-23 01:33:33,660 INFO L625 ElimStorePlain]: treesize reduction 108, result has 54.0 percent of original size [2020-12-23 01:33:33,662 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-23 01:33:33,662 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:170, output treesize:127 [2020-12-23 01:33:36,809 WARN L197 SmtUtils]: Spent 2.48 s on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2020-12-23 01:33:37,847 WARN L197 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2020-12-23 01:33:38,090 WARN L197 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 60 [2020-12-23 01:33:38,092 INFO L348 Elim1Store]: treesize reduction 322, result has 25.6 percent of original size [2020-12-23 01:33:38,093 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 114 treesize of output 231 [2020-12-23 01:33:38,099 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:33:38,403 WARN L197 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2020-12-23 01:33:38,403 INFO L625 ElimStorePlain]: treesize reduction 70, result has 60.9 percent of original size [2020-12-23 01:33:38,405 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 01:33:38,405 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:124, output treesize:109 [2020-12-23 01:33:39,327 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-12-23 01:33:40,275 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-12-23 01:33:40,855 WARN L197 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 100 [2020-12-23 01:33:40,856 INFO L348 Elim1Store]: treesize reduction 322, result has 42.4 percent of original size [2020-12-23 01:33:40,857 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 45 case distinctions, treesize of input 135 treesize of output 373 [2020-12-23 01:33:40,866 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:33:41,247 WARN L197 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2020-12-23 01:33:41,248 INFO L625 ElimStorePlain]: treesize reduction 96, result has 55.6 percent of original size [2020-12-23 01:33:41,249 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 01:33:41,250 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:145, output treesize:120 [2020-12-23 01:33:42,362 WARN L197 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2020-12-23 01:33:43,398 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-12-23 01:33:43,998 WARN L197 SmtUtils]: Spent 584.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 100 [2020-12-23 01:33:43,999 INFO L348 Elim1Store]: treesize reduction 322, result has 42.4 percent of original size [2020-12-23 01:33:44,000 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 45 case distinctions, treesize of input 135 treesize of output 373 [2020-12-23 01:33:44,010 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:33:44,430 WARN L197 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 60 [2020-12-23 01:33:44,431 INFO L625 ElimStorePlain]: treesize reduction 138, result has 49.5 percent of original size [2020-12-23 01:33:44,433 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 01:33:44,433 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:145, output treesize:135 [2020-12-23 01:33:45,453 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-12-23 01:33:46,591 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-12-23 01:33:47,577 WARN L197 SmtUtils]: Spent 968.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 144 [2020-12-23 01:33:47,578 INFO L348 Elim1Store]: treesize reduction 322, result has 54.1 percent of original size [2020-12-23 01:33:47,579 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 1 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 55 case distinctions, treesize of input 161 treesize of output 532 [2020-12-23 01:33:47,592 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:33:48,017 WARN L197 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 64 [2020-12-23 01:33:48,018 INFO L625 ElimStorePlain]: treesize reduction 220, result has 38.9 percent of original size [2020-12-23 01:33:48,022 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-23 01:33:48,022 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:171, output treesize:140 [2020-12-23 01:33:49,399 WARN L197 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-12-23 01:33:50,521 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-12-23 01:33:51,474 WARN L197 SmtUtils]: Spent 932.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 144 [2020-12-23 01:33:51,476 INFO L348 Elim1Store]: treesize reduction 322, result has 54.1 percent of original size [2020-12-23 01:33:51,476 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 1 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 55 case distinctions, treesize of input 155 treesize of output 530 [2020-12-23 01:33:51,492 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:33:51,921 WARN L197 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 64 [2020-12-23 01:33:51,922 INFO L625 ElimStorePlain]: treesize reduction 118, result has 52.6 percent of original size [2020-12-23 01:33:51,928 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2020-12-23 01:33:51,928 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:165, output treesize:131 [2020-12-23 01:33:52,885 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:33:52,888 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:33:52,889 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:33:52,901 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 01:33:52,912 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 01:33:52,915 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 13 disjuncts [2020-12-23 01:33:52,926 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 16 disjuncts [2020-12-23 01:33:53,515 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:33:53,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:33:53,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 72 [2020-12-23 01:33:53,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588947005] [2020-12-23 01:33:53,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-12-23 01:33:53,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:33:53,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-12-23 01:33:53,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=4878, Unknown=0, NotChecked=0, Total=5112 [2020-12-23 01:33:53,517 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand 72 states. [2020-12-23 01:33:56,999 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-12-23 01:33:58,133 WARN L197 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2020-12-23 01:33:58,770 WARN L197 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-12-23 01:33:59,628 WARN L197 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2020-12-23 01:34:01,106 WARN L197 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2020-12-23 01:34:02,408 WARN L197 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2020-12-23 01:34:03,901 WARN L197 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2020-12-23 01:34:05,348 WARN L197 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2020-12-23 01:34:06,912 WARN L197 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2020-12-23 01:34:08,980 WARN L197 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 69 [2020-12-23 01:34:11,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:34:11,054 INFO L93 Difference]: Finished difference Result 112 states and 127 transitions. [2020-12-23 01:34:11,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-23 01:34:11,055 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 51 [2020-12-23 01:34:11,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:34:11,056 INFO L225 Difference]: With dead ends: 112 [2020-12-23 01:34:11,056 INFO L226 Difference]: Without dead ends: 83 [2020-12-23 01:34:11,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 17 SyntacticMatches, 8 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1900 ImplicationChecksByTransitivity, 36.0s TimeCoverageRelationStatistics Valid=332, Invalid=6640, Unknown=0, NotChecked=0, Total=6972 [2020-12-23 01:34:11,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-23 01:34:11,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 72. [2020-12-23 01:34:11,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-23 01:34:11,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 79 transitions. [2020-12-23 01:34:11,084 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 79 transitions. Word has length 51 [2020-12-23 01:34:11,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:34:11,084 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 79 transitions. [2020-12-23 01:34:11,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-12-23 01:34:11,085 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 79 transitions. [2020-12-23 01:34:11,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-23 01:34:11,085 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:34:11,085 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:34:11,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:34:11,286 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:34:11,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:34:11,287 INFO L82 PathProgramCache]: Analyzing trace with hash -519119029, now seen corresponding path program 7 times [2020-12-23 01:34:11,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:34:11,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370600672] [2020-12-23 01:34:11,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:34:11,307 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 01:34:11,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [163642530] [2020-12-23 01:34:11,307 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 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 01:34:11,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:34:11,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-23 01:34:11,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:34:11,395 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 01:34:11,398 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:34:11,406 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:34:11,407 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:34:11,407 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-12-23 01:34:11,532 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-23 01:34:11,533 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:34:11,550 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:34:11,551 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:34:11,552 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2020-12-23 01:34:11,672 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:34:11,674 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 54 [2020-12-23 01:34:11,677 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:34:11,744 INFO L625 ElimStorePlain]: treesize reduction 22, result has 56.0 percent of original size [2020-12-23 01:34:11,745 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:34:11,745 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2020-12-23 01:34:11,968 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:34:11,969 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 118 [2020-12-23 01:34:11,972 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:34:12,072 INFO L625 ElimStorePlain]: treesize reduction 50, result has 46.8 percent of original size [2020-12-23 01:34:12,080 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 01:34:12,080 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:48, output treesize:44 [2020-12-23 01:34:12,581 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:34:12,581 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 151 [2020-12-23 01:34:12,584 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:34:12,665 INFO L625 ElimStorePlain]: treesize reduction 66, result has 41.6 percent of original size [2020-12-23 01:34:12,667 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 01:34:12,668 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:72, output treesize:47 [2020-12-23 01:34:12,918 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:34:12,919 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 151 [2020-12-23 01:34:12,922 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:34:13,005 INFO L625 ElimStorePlain]: treesize reduction 64, result has 42.3 percent of original size [2020-12-23 01:34:13,007 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 01:34:13,008 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:72, output treesize:47 [2020-12-23 01:34:13,196 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:34:13,196 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 151 [2020-12-23 01:34:13,200 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:34:13,281 INFO L625 ElimStorePlain]: treesize reduction 66, result has 41.6 percent of original size [2020-12-23 01:34:13,284 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 01:34:13,285 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:72, output treesize:47 [2020-12-23 01:34:13,464 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:34:13,465 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 151 [2020-12-23 01:34:13,471 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:34:13,552 INFO L625 ElimStorePlain]: treesize reduction 102, result has 31.5 percent of original size [2020-12-23 01:34:13,554 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 01:34:13,555 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:72, output treesize:47 [2020-12-23 01:34:13,754 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:34:13,754 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 151 [2020-12-23 01:34:13,758 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:34:13,837 INFO L625 ElimStorePlain]: treesize reduction 102, result has 31.5 percent of original size [2020-12-23 01:34:13,844 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 01:34:13,844 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:72, output treesize:43 [2020-12-23 01:34:14,090 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:34:14,090 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 57 [2020-12-23 01:34:14,092 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:34:14,104 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:34:14,106 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:34:14,107 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:49, output treesize:3 [2020-12-23 01:34:14,183 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 46 proven. 103 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 01:34:14,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370600672] [2020-12-23 01:34:14,183 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 01:34:14,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163642530] [2020-12-23 01:34:14,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 01:34:14,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-12-23 01:34:14,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351049127] [2020-12-23 01:34:14,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 01:34:14,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:34:14,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 01:34:14,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2020-12-23 01:34:14,185 INFO L87 Difference]: Start difference. First operand 72 states and 79 transitions. Second operand 21 states. [2020-12-23 01:34:16,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:34:16,477 INFO L93 Difference]: Finished difference Result 88 states and 98 transitions. [2020-12-23 01:34:16,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 01:34:16,478 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 51 [2020-12-23 01:34:16,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:34:16,479 INFO L225 Difference]: With dead ends: 88 [2020-12-23 01:34:16,479 INFO L226 Difference]: Without dead ends: 76 [2020-12-23 01:34:16,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2020-12-23 01:34:16,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-23 01:34:16,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-12-23 01:34:16,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-23 01:34:16,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2020-12-23 01:34:16,502 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 51 [2020-12-23 01:34:16,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:34:16,502 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2020-12-23 01:34:16,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 01:34:16,503 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2020-12-23 01:34:16,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-23 01:34:16,503 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:34:16,503 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:34:16,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-23 01:34:16,718 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:34:16,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:34:16,718 INFO L82 PathProgramCache]: Analyzing trace with hash 947978831, now seen corresponding path program 23 times [2020-12-23 01:34:16,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:34:16,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341099103] [2020-12-23 01:34:16,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:34:16,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:34:17,258 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 49 proven. 124 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:34:17,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341099103] [2020-12-23 01:34:17,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449733817] [2020-12-23 01:34:17,258 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 01:34:17,535 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-12-23 01:34:17,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:34:17,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 01:34:17,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:34:18,023 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 64 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:34:18,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:34:18,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 31 [2020-12-23 01:34:18,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102789954] [2020-12-23 01:34:18,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 01:34:18,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:34:18,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 01:34:18,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=697, Unknown=0, NotChecked=0, Total=930 [2020-12-23 01:34:18,025 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand 31 states. [2020-12-23 01:34:20,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:34:20,275 INFO L93 Difference]: Finished difference Result 106 states and 118 transitions. [2020-12-23 01:34:20,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 01:34:20,278 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 53 [2020-12-23 01:34:20,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:34:20,279 INFO L225 Difference]: With dead ends: 106 [2020-12-23 01:34:20,279 INFO L226 Difference]: Without dead ends: 102 [2020-12-23 01:34:20,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=526, Invalid=1826, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 01:34:20,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-23 01:34:20,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 60. [2020-12-23 01:34:20,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-23 01:34:20,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2020-12-23 01:34:20,301 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 53 [2020-12-23 01:34:20,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:34:20,302 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2020-12-23 01:34:20,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 01:34:20,302 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2020-12-23 01:34:20,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-23 01:34:20,302 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:34:20,303 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:34:20,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:34:20,518 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:34:20,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:34:20,519 INFO L82 PathProgramCache]: Analyzing trace with hash -373843623, now seen corresponding path program 24 times [2020-12-23 01:34:20,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:34:20,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531846768] [2020-12-23 01:34:20,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:34:20,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:34:21,071 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 95 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:34:21,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531846768] [2020-12-23 01:34:21,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717003778] [2020-12-23 01:34:21,072 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 01:34:21,267 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-12-23 01:34:21,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:34:21,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 01:34:21,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:34:21,935 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 117 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:34:21,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:34:21,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 31 [2020-12-23 01:34:21,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411265825] [2020-12-23 01:34:21,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 01:34:21,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:34:21,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 01:34:21,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=705, Unknown=0, NotChecked=0, Total=930 [2020-12-23 01:34:21,937 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand 31 states. [2020-12-23 01:34:22,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:34:22,806 INFO L93 Difference]: Finished difference Result 110 states and 123 transitions. [2020-12-23 01:34:22,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 01:34:22,808 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 54 [2020-12-23 01:34:22,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:34:22,809 INFO L225 Difference]: With dead ends: 110 [2020-12-23 01:34:22,809 INFO L226 Difference]: Without dead ends: 70 [2020-12-23 01:34:22,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=378, Invalid=1182, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 01:34:22,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-23 01:34:22,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 57. [2020-12-23 01:34:22,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-23 01:34:22,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2020-12-23 01:34:22,828 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 54 [2020-12-23 01:34:22,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:34:22,829 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2020-12-23 01:34:22,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 01:34:22,829 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2020-12-23 01:34:22,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-23 01:34:22,829 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:34:22,829 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:34:23,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-23 01:34:23,030 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:34:23,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:34:23,031 INFO L82 PathProgramCache]: Analyzing trace with hash -928564137, now seen corresponding path program 25 times [2020-12-23 01:34:23,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:34:23,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329426727] [2020-12-23 01:34:23,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:34:23,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:34:27,645 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2020-12-23 01:34:27,979 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:34:27,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329426727] [2020-12-23 01:34:27,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204442690] [2020-12-23 01:34:27,979 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 01:34:28,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:34:28,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 92 conjunts are in the unsatisfiable core [2020-12-23 01:34:28,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:34:28,375 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-23 01:34:28,377 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:34:28,392 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:34:28,393 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:34:28,393 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2020-12-23 01:34:28,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:34:28,610 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 01:34:28,611 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:34:28,639 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:34:28,640 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:34:28,640 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:30 [2020-12-23 01:34:29,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:34:29,108 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:34:29,109 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 56 [2020-12-23 01:34:29,112 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:34:29,193 INFO L625 ElimStorePlain]: treesize reduction 20, result has 64.9 percent of original size [2020-12-23 01:34:29,195 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:34:29,195 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:37 [2020-12-23 01:34:29,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:34:29,803 INFO L348 Elim1Store]: treesize reduction 52, result has 45.8 percent of original size [2020-12-23 01:34:29,804 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 71 [2020-12-23 01:34:29,807 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:34:29,927 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2020-12-23 01:34:29,928 INFO L625 ElimStorePlain]: treesize reduction 20, result has 71.0 percent of original size [2020-12-23 01:34:29,929 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:34:29,930 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:53, output treesize:49 [2020-12-23 01:34:30,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:34:30,602 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 28 [2020-12-23 01:34:30,603 INFO L348 Elim1Store]: treesize reduction 122, result has 31.5 percent of original size [2020-12-23 01:34:30,604 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 86 [2020-12-23 01:34:30,607 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:34:30,759 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2020-12-23 01:34:30,760 INFO L625 ElimStorePlain]: treesize reduction 20, result has 75.3 percent of original size [2020-12-23 01:34:30,761 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:34:30,762 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:65, output treesize:61 [2020-12-23 01:34:31,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:34:31,901 WARN L197 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 47 [2020-12-23 01:34:31,902 INFO L348 Elim1Store]: treesize reduction 66, result has 69.3 percent of original size [2020-12-23 01:34:31,903 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 182 [2020-12-23 01:34:31,919 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:34:32,224 WARN L197 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2020-12-23 01:34:32,225 INFO L625 ElimStorePlain]: treesize reduction 86, result has 42.7 percent of original size [2020-12-23 01:34:32,226 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:34:32,227 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:64 [2020-12-23 01:34:33,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:34:33,872 WARN L197 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 52 [2020-12-23 01:34:33,873 INFO L348 Elim1Store]: treesize reduction 163, result has 49.7 percent of original size [2020-12-23 01:34:33,873 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 69 treesize of output 197 [2020-12-23 01:34:33,881 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:34:34,192 WARN L197 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2020-12-23 01:34:34,193 INFO L625 ElimStorePlain]: treesize reduction 86, result has 46.9 percent of original size [2020-12-23 01:34:34,193 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:34:34,194 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:80, output treesize:76 [2020-12-23 01:34:35,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:34:36,074 WARN L197 SmtUtils]: Spent 594.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 67 [2020-12-23 01:34:36,076 INFO L348 Elim1Store]: treesize reduction 170, result has 57.2 percent of original size [2020-12-23 01:34:36,077 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 266 [2020-12-23 01:34:36,081 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:34:36,502 WARN L197 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 47 [2020-12-23 01:34:36,503 INFO L625 ElimStorePlain]: treesize reduction 130, result has 38.7 percent of original size [2020-12-23 01:34:36,504 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:34:36,505 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:86, output treesize:82 [2020-12-23 01:34:37,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:34:38,648 WARN L197 SmtUtils]: Spent 688.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 77 [2020-12-23 01:34:38,649 INFO L348 Elim1Store]: treesize reduction 240, result has 52.6 percent of original size [2020-12-23 01:34:38,649 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 84 treesize of output 308 [2020-12-23 01:34:38,654 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:34:39,173 WARN L197 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 51 [2020-12-23 01:34:39,175 INFO L625 ElimStorePlain]: treesize reduction 152, result has 37.4 percent of original size [2020-12-23 01:34:39,176 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:34:39,176 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:95, output treesize:91 [2020-12-23 01:34:40,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:34:41,781 WARN L197 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 199 DAG size of output: 87 [2020-12-23 01:34:41,782 INFO L348 Elim1Store]: treesize reduction 322, result has 48.6 percent of original size [2020-12-23 01:34:41,783 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 93 treesize of output 350 [2020-12-23 01:34:41,789 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:34:42,388 WARN L197 SmtUtils]: Spent 597.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 55 [2020-12-23 01:34:42,389 INFO L625 ElimStorePlain]: treesize reduction 174, result has 37.2 percent of original size [2020-12-23 01:34:42,390 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:34:42,390 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:107, output treesize:103 [2020-12-23 01:34:43,356 WARN L197 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-12-23 01:34:44,251 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-12-23 01:34:45,425 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-12-23 01:34:46,699 WARN L197 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-12-23 01:34:46,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:34:47,104 WARN L197 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 67 [2020-12-23 01:34:47,105 INFO L348 Elim1Store]: treesize reduction 416, result has 23.1 percent of original size [2020-12-23 01:34:47,106 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 45 case distinctions, treesize of input 123 treesize of output 257 [2020-12-23 01:34:47,114 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:34:47,483 WARN L197 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 57 [2020-12-23 01:34:47,484 INFO L625 ElimStorePlain]: treesize reduction 98, result has 53.6 percent of original size [2020-12-23 01:34:47,486 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 01:34:47,486 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:134, output treesize:113 [2020-12-23 01:34:48,806 WARN L197 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-12-23 01:34:50,107 WARN L197 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-12-23 01:34:50,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:34:50,522 WARN L197 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 67 [2020-12-23 01:34:50,523 INFO L348 Elim1Store]: treesize reduction 416, result has 23.1 percent of original size [2020-12-23 01:34:50,523 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 45 case distinctions, treesize of input 123 treesize of output 257 [2020-12-23 01:34:50,530 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:34:50,781 WARN L197 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-12-23 01:34:50,781 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:34:50,783 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 01:34:50,784 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:134, output treesize:109 [2020-12-23 01:34:53,654 WARN L197 SmtUtils]: Spent 1.69 s on a formula simplification that was a NOOP. DAG size: 59 [2020-12-23 01:34:57,355 WARN L197 SmtUtils]: Spent 2.34 s on a formula simplification that was a NOOP. DAG size: 65 [2020-12-23 01:34:57,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:34:58,228 WARN L197 SmtUtils]: Spent 848.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 111 [2020-12-23 01:34:58,229 INFO L348 Elim1Store]: treesize reduction 416, result has 38.9 percent of original size [2020-12-23 01:34:58,230 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 1 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 55 case distinctions, treesize of input 134 treesize of output 411 [2020-12-23 01:34:58,240 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:34:58,852 WARN L197 SmtUtils]: Spent 611.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 64 [2020-12-23 01:34:58,854 INFO L625 ElimStorePlain]: treesize reduction 94, result has 58.0 percent of original size [2020-12-23 01:34:58,855 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 01:34:58,856 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:145, output treesize:130 [2020-12-23 01:35:00,507 WARN L197 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-12-23 01:35:02,161 WARN L197 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-12-23 01:35:02,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:35:03,126 WARN L197 SmtUtils]: Spent 942.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 111 [2020-12-23 01:35:03,128 INFO L348 Elim1Store]: treesize reduction 416, result has 38.9 percent of original size [2020-12-23 01:35:03,128 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 1 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 55 case distinctions, treesize of input 144 treesize of output 413 [2020-12-23 01:35:03,143 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:35:03,759 WARN L197 SmtUtils]: Spent 615.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 66 [2020-12-23 01:35:03,760 INFO L625 ElimStorePlain]: treesize reduction 193, result has 42.9 percent of original size [2020-12-23 01:35:03,761 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 01:35:03,762 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:155, output treesize:145 [2020-12-23 01:35:05,107 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-12-23 01:35:06,878 WARN L197 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-12-23 01:35:06,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:35:08,385 WARN L197 SmtUtils]: Spent 1.48 s on a formula simplification. DAG size of input: 303 DAG size of output: 159 [2020-12-23 01:35:08,386 INFO L348 Elim1Store]: treesize reduction 416, result has 50.3 percent of original size [2020-12-23 01:35:08,387 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 1 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 66 case distinctions, treesize of input 170 treesize of output 586 [2020-12-23 01:35:08,409 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:35:09,187 WARN L197 SmtUtils]: Spent 777.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 69 [2020-12-23 01:35:09,188 INFO L625 ElimStorePlain]: treesize reduction 172, result has 46.6 percent of original size [2020-12-23 01:35:09,191 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-23 01:35:09,192 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:181, output treesize:150 [2020-12-23 01:35:11,069 WARN L197 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2020-12-23 01:35:12,919 WARN L197 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-12-23 01:35:12,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 01:35:14,443 WARN L197 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 303 DAG size of output: 159 [2020-12-23 01:35:14,444 INFO L348 Elim1Store]: treesize reduction 416, result has 50.3 percent of original size [2020-12-23 01:35:14,445 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 1 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 66 case distinctions, treesize of input 164 treesize of output 584 [2020-12-23 01:35:14,461 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:35:14,978 WARN L197 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 70 [2020-12-23 01:35:14,979 INFO L625 ElimStorePlain]: treesize reduction 248, result has 38.6 percent of original size [2020-12-23 01:35:14,982 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-23 01:35:14,983 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:175, output treesize:156