/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-examples/standard_init9_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 21:34:31,361 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 21:34:31,365 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 21:34:31,428 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-21 21:34:31,544 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 21:34:31,605 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 21:34:31,606 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 21:34:31,612 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 21:34:31,613 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 21:34:31,613 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 21:34:31,613 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 21:34:31,614 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 21:34:31,614 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 21:34:31,614 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 21:34:31,615 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 21:34:31,616 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 21:34:31,616 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 21:34:31,617 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 21:34:31,617 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 21:34:31,617 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 21:34:31,617 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 21:34:31,618 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 21:34:31,618 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:34:31,618 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 21:34:31,618 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 21:34:31,619 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 21:34:31,619 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 21:34:31,619 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 21:34:31,620 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 21:34:31,620 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 21:34:31,620 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 21:34:32,083 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 21:34:32,138 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 21:34:32,141 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 21:34:32,143 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 21:34:32,143 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 21:34:32,144 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_init9_ground-1.i [2020-12-21 21:34:32,241 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f51bf8cc8/8dc6ca16ee7646bcab659f849f2e1ba8/FLAG6ea6e90f6 [2020-12-21 21:34:33,030 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 21:34:33,031 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_init9_ground-1.i [2020-12-21 21:34:33,041 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f51bf8cc8/8dc6ca16ee7646bcab659f849f2e1ba8/FLAG6ea6e90f6 [2020-12-21 21:34:33,362 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f51bf8cc8/8dc6ca16ee7646bcab659f849f2e1ba8 [2020-12-21 21:34:33,369 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 21:34:33,371 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 21:34:33,376 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 21:34:33,376 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 21:34:33,380 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 21:34:33,382 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:34:33" (1/1) ... [2020-12-21 21:34:33,386 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f6b1149 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:34:33, skipping insertion in model container [2020-12-21 21:34:33,386 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:34:33" (1/1) ... [2020-12-21 21:34:33,396 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 21:34:33,422 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 21:34:33,598 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_init9_ground-1.i[816,829] [2020-12-21 21:34:33,624 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:34:33,635 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 21:34:33,651 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_init9_ground-1.i[816,829] [2020-12-21 21:34:33,664 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:34:33,683 INFO L208 MainTranslator]: Completed translation [2020-12-21 21:34:33,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:34:33 WrapperNode [2020-12-21 21:34:33,684 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 21:34:33,688 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 21:34:33,689 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 21:34:33,689 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 21:34:33,699 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:34:33" (1/1) ... [2020-12-21 21:34:33,709 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:34:33" (1/1) ... [2020-12-21 21:34:33,736 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 21:34:33,737 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 21:34:33,737 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 21:34:33,737 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 21:34:33,748 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:34:33" (1/1) ... [2020-12-21 21:34:33,748 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:34:33" (1/1) ... [2020-12-21 21:34:33,751 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:34:33" (1/1) ... [2020-12-21 21:34:33,751 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:34:33" (1/1) ... [2020-12-21 21:34:33,757 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:34:33" (1/1) ... [2020-12-21 21:34:33,765 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:34:33" (1/1) ... [2020-12-21 21:34:33,767 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:34:33" (1/1) ... [2020-12-21 21:34:33,770 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 21:34:33,771 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 21:34:33,771 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 21:34:33,772 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 21:34:33,773 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:34:33" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:34:33,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 21:34:33,899 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 21:34:33,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 21:34:33,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 21:34:33,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 21:34:33,901 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 21:34:33,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 21:34:34,492 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 21:34:34,495 INFO L299 CfgBuilder]: Removed 16 assume(true) statements. [2020-12-21 21:34:34,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:34:34 BoogieIcfgContainer [2020-12-21 21:34:34,503 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 21:34:34,504 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 21:34:34,505 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 21:34:34,512 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 21:34:34,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:34:33" (1/3) ... [2020-12-21 21:34:34,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@251a0e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:34:34, skipping insertion in model container [2020-12-21 21:34:34,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:34:33" (2/3) ... [2020-12-21 21:34:34,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@251a0e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:34:34, skipping insertion in model container [2020-12-21 21:34:34,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:34:34" (3/3) ... [2020-12-21 21:34:34,518 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init9_ground-1.i [2020-12-21 21:34:34,526 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 21:34:34,532 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 21:34:34,556 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 21:34:34,605 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 21:34:34,608 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 21:34:34,608 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 21:34:34,609 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 21:34:34,609 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 21:34:34,609 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 21:34:34,609 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 21:34:34,609 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 21:34:34,633 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-12-21 21:34:34,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-21 21:34:34,648 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:34:34,649 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:34:34,650 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:34:34,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:34:34,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1478943884, now seen corresponding path program 1 times [2020-12-21 21:34:34,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:34:34,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418525101] [2020-12-21 21:34:34,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:34:34,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:34,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:34:34,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418525101] [2020-12-21 21:34:34,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:34:34,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 21:34:34,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412045389] [2020-12-21 21:34:34,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:34:34,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:34:34,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:34:34,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:34:34,989 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 3 states. [2020-12-21 21:34:35,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:34:35,163 INFO L93 Difference]: Finished difference Result 66 states and 122 transitions. [2020-12-21 21:34:35,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:34:35,166 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-12-21 21:34:35,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:34:35,176 INFO L225 Difference]: With dead ends: 66 [2020-12-21 21:34:35,177 INFO L226 Difference]: Without dead ends: 35 [2020-12-21 21:34:35,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:34:35,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-21 21:34:35,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-12-21 21:34:35,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-21 21:34:35,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2020-12-21 21:34:35,225 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 23 [2020-12-21 21:34:35,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:34:35,225 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2020-12-21 21:34:35,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:34:35,226 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2020-12-21 21:34:35,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-21 21:34:35,227 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:34:35,227 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:34:35,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 21:34:35,228 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:34:35,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:34:35,229 INFO L82 PathProgramCache]: Analyzing trace with hash 527193407, now seen corresponding path program 1 times [2020-12-21 21:34:35,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:34:35,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971383483] [2020-12-21 21:34:35,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:34:35,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:35,287 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-21 21:34:35,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971383483] [2020-12-21 21:34:35,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964205016] [2020-12-21 21:34:35,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:34:35,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:35,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:34:35,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:34:35,498 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-21 21:34:35,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:34:35,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 21:34:35,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174508244] [2020-12-21 21:34:35,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:34:35,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:34:35,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:34:35,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:34:35,503 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand 5 states. [2020-12-21 21:34:35,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:34:35,760 INFO L93 Difference]: Finished difference Result 75 states and 101 transitions. [2020-12-21 21:34:35,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:34:35,761 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2020-12-21 21:34:35,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:34:35,763 INFO L225 Difference]: With dead ends: 75 [2020-12-21 21:34:35,763 INFO L226 Difference]: Without dead ends: 44 [2020-12-21 21:34:35,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:34:35,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-21 21:34:35,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-12-21 21:34:35,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-21 21:34:35,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2020-12-21 21:34:35,777 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 32 [2020-12-21 21:34:35,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:34:35,778 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2020-12-21 21:34:35,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:34:35,778 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2020-12-21 21:34:35,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-21 21:34:35,780 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:34:35,780 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:34:35,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-21 21:34:35,995 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:34:35,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:34:35,996 INFO L82 PathProgramCache]: Analyzing trace with hash -368986008, now seen corresponding path program 2 times [2020-12-21 21:34:35,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:34:35,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333503359] [2020-12-21 21:34:35,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:34:36,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:36,193 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-21 21:34:36,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333503359] [2020-12-21 21:34:36,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264904958] [2020-12-21 21:34:36,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:34:36,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:34:36,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:34:36,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:34:36,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:34:36,436 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-21 21:34:36,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:34:36,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-21 21:34:36,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114456054] [2020-12-21 21:34:36,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 21:34:36,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:34:36,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 21:34:36,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:34:36,440 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 6 states. [2020-12-21 21:34:36,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:34:36,658 INFO L93 Difference]: Finished difference Result 92 states and 118 transitions. [2020-12-21 21:34:36,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 21:34:36,659 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2020-12-21 21:34:36,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:34:36,660 INFO L225 Difference]: With dead ends: 92 [2020-12-21 21:34:36,660 INFO L226 Difference]: Without dead ends: 53 [2020-12-21 21:34:36,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:34:36,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-21 21:34:36,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-12-21 21:34:36,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-21 21:34:36,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2020-12-21 21:34:36,672 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 41 [2020-12-21 21:34:36,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:34:36,672 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2020-12-21 21:34:36,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 21:34:36,673 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2020-12-21 21:34:36,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-21 21:34:36,674 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:34:36,675 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:34:36,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:34:36,891 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:34:36,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:34:36,893 INFO L82 PathProgramCache]: Analyzing trace with hash 763354719, now seen corresponding path program 3 times [2020-12-21 21:34:36,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:34:36,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763844201] [2020-12-21 21:34:36,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:34:36,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:37,006 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-12-21 21:34:37,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763844201] [2020-12-21 21:34:37,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370758180] [2020-12-21 21:34:37,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:34:37,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-21 21:34:37,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:34:37,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:34:37,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:34:37,352 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-12-21 21:34:37,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:34:37,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-21 21:34:37,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667347897] [2020-12-21 21:34:37,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:34:37,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:34:37,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:34:37,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:34:37,355 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand 7 states. [2020-12-21 21:34:37,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:34:37,549 INFO L93 Difference]: Finished difference Result 109 states and 135 transitions. [2020-12-21 21:34:37,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 21:34:37,550 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2020-12-21 21:34:37,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:34:37,551 INFO L225 Difference]: With dead ends: 109 [2020-12-21 21:34:37,551 INFO L226 Difference]: Without dead ends: 62 [2020-12-21 21:34:37,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:34:37,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-21 21:34:37,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-12-21 21:34:37,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-21 21:34:37,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2020-12-21 21:34:37,561 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 50 [2020-12-21 21:34:37,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:34:37,562 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2020-12-21 21:34:37,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:34:37,562 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2020-12-21 21:34:37,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-21 21:34:37,564 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:34:37,564 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:34:37,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:34:37,780 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:34:37,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:34:37,781 INFO L82 PathProgramCache]: Analyzing trace with hash -500879800, now seen corresponding path program 4 times [2020-12-21 21:34:37,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:34:37,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314346791] [2020-12-21 21:34:37,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:34:37,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:37,916 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-12-21 21:34:37,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314346791] [2020-12-21 21:34:37,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345888521] [2020-12-21 21:34:37,917 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:34:38,057 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:34:38,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:34:38,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:34:38,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:34:38,170 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-12-21 21:34:38,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:34:38,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-21 21:34:38,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994074271] [2020-12-21 21:34:38,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 21:34:38,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:34:38,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 21:34:38,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:34:38,173 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand 8 states. [2020-12-21 21:34:38,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:34:38,361 INFO L93 Difference]: Finished difference Result 126 states and 152 transitions. [2020-12-21 21:34:38,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:34:38,362 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 59 [2020-12-21 21:34:38,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:34:38,363 INFO L225 Difference]: With dead ends: 126 [2020-12-21 21:34:38,363 INFO L226 Difference]: Without dead ends: 71 [2020-12-21 21:34:38,364 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:34:38,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-21 21:34:38,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-12-21 21:34:38,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-21 21:34:38,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 80 transitions. [2020-12-21 21:34:38,373 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 80 transitions. Word has length 59 [2020-12-21 21:34:38,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:34:38,373 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 80 transitions. [2020-12-21 21:34:38,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 21:34:38,374 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 80 transitions. [2020-12-21 21:34:38,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-21 21:34:38,375 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:34:38,375 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:34:38,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:34:38,589 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:34:38,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:34:38,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1617731713, now seen corresponding path program 5 times [2020-12-21 21:34:38,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:34:38,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70273979] [2020-12-21 21:34:38,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:34:38,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:38,760 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-12-21 21:34:38,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70273979] [2020-12-21 21:34:38,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348932217] [2020-12-21 21:34:38,761 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:35:02,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-21 21:35:02,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:35:02,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 21:35:02,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:35:03,011 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-12-21 21:35:03,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:35:03,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-21 21:35:03,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359783304] [2020-12-21 21:35:03,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 21:35:03,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:35:03,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 21:35:03,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:35:03,015 INFO L87 Difference]: Start difference. First operand 71 states and 80 transitions. Second operand 9 states. [2020-12-21 21:35:03,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:35:03,215 INFO L93 Difference]: Finished difference Result 143 states and 169 transitions. [2020-12-21 21:35:03,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 21:35:03,215 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 68 [2020-12-21 21:35:03,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:35:03,216 INFO L225 Difference]: With dead ends: 143 [2020-12-21 21:35:03,216 INFO L226 Difference]: Without dead ends: 80 [2020-12-21 21:35:03,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:35:03,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-21 21:35:03,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-12-21 21:35:03,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-21 21:35:03,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2020-12-21 21:35:03,227 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 68 [2020-12-21 21:35:03,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:35:03,227 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2020-12-21 21:35:03,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 21:35:03,227 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2020-12-21 21:35:03,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-21 21:35:03,228 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:35:03,229 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:35:03,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-21 21:35:03,442 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:35:03,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:35:03,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1599394776, now seen corresponding path program 6 times [2020-12-21 21:35:03,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:35:03,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7168890] [2020-12-21 21:35:03,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:35:03,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:35:03,658 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2020-12-21 21:35:03,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7168890] [2020-12-21 21:35:03,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100423115] [2020-12-21 21:35:03,659 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:35:08,232 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-21 21:35:08,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:35:08,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 21:35:08,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:35:08,327 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2020-12-21 21:35:08,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:35:08,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-21 21:35:08,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313812622] [2020-12-21 21:35:08,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 21:35:08,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:35:08,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 21:35:08,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:35:08,330 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand 10 states. [2020-12-21 21:35:08,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:35:08,502 INFO L93 Difference]: Finished difference Result 160 states and 186 transitions. [2020-12-21 21:35:08,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 21:35:08,502 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 77 [2020-12-21 21:35:08,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:35:08,503 INFO L225 Difference]: With dead ends: 160 [2020-12-21 21:35:08,503 INFO L226 Difference]: Without dead ends: 89 [2020-12-21 21:35:08,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:35:08,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-21 21:35:08,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-12-21 21:35:08,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-21 21:35:08,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 98 transitions. [2020-12-21 21:35:08,530 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 98 transitions. Word has length 77 [2020-12-21 21:35:08,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:35:08,534 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 98 transitions. [2020-12-21 21:35:08,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 21:35:08,534 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 98 transitions. [2020-12-21 21:35:08,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-21 21:35:08,535 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:35:08,536 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:35:08,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:35:08,752 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:35:08,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:35:08,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1824577695, now seen corresponding path program 7 times [2020-12-21 21:35:08,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:35:08,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914281402] [2020-12-21 21:35:08,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:35:08,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:35:08,915 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2020-12-21 21:35:08,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914281402] [2020-12-21 21:35:08,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456155405] [2020-12-21 21:35:08,916 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:35:09,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:35:09,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 21:35:09,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:35:09,100 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2020-12-21 21:35:09,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:35:09,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-21 21:35:09,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209076229] [2020-12-21 21:35:09,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 21:35:09,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:35:09,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 21:35:09,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:35:09,103 INFO L87 Difference]: Start difference. First operand 89 states and 98 transitions. Second operand 11 states. [2020-12-21 21:35:09,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:35:09,289 INFO L93 Difference]: Finished difference Result 177 states and 203 transitions. [2020-12-21 21:35:09,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 21:35:09,291 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 86 [2020-12-21 21:35:09,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:35:09,292 INFO L225 Difference]: With dead ends: 177 [2020-12-21 21:35:09,292 INFO L226 Difference]: Without dead ends: 98 [2020-12-21 21:35:09,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:35:09,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-21 21:35:09,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-12-21 21:35:09,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-12-21 21:35:09,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 107 transitions. [2020-12-21 21:35:09,301 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 107 transitions. Word has length 86 [2020-12-21 21:35:09,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:35:09,301 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 107 transitions. [2020-12-21 21:35:09,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 21:35:09,301 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 107 transitions. [2020-12-21 21:35:09,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-21 21:35:09,303 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:35:09,303 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:35:09,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:35:09,517 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:35:09,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:35:09,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1137069560, now seen corresponding path program 8 times [2020-12-21 21:35:09,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:35:09,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784405162] [2020-12-21 21:35:09,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:35:09,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:35:09,763 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-12-21 21:35:09,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784405162] [2020-12-21 21:35:09,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776800685] [2020-12-21 21:35:09,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:35:09,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:35:09,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:35:09,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 21:35:09,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:35:10,012 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-12-21 21:35:10,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:35:10,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-21 21:35:10,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373049348] [2020-12-21 21:35:10,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 21:35:10,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:35:10,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 21:35:10,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:35:10,015 INFO L87 Difference]: Start difference. First operand 98 states and 107 transitions. Second operand 12 states. [2020-12-21 21:35:10,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:35:10,220 INFO L93 Difference]: Finished difference Result 194 states and 220 transitions. [2020-12-21 21:35:10,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 21:35:10,222 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 95 [2020-12-21 21:35:10,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:35:10,223 INFO L225 Difference]: With dead ends: 194 [2020-12-21 21:35:10,224 INFO L226 Difference]: Without dead ends: 107 [2020-12-21 21:35:10,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:35:10,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-12-21 21:35:10,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-12-21 21:35:10,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-12-21 21:35:10,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 116 transitions. [2020-12-21 21:35:10,245 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 116 transitions. Word has length 95 [2020-12-21 21:35:10,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:35:10,247 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 116 transitions. [2020-12-21 21:35:10,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 21:35:10,248 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 116 transitions. [2020-12-21 21:35:10,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-21 21:35:10,249 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:35:10,250 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:35:10,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-21 21:35:10,465 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:35:10,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:35:10,466 INFO L82 PathProgramCache]: Analyzing trace with hash -6141505, now seen corresponding path program 9 times [2020-12-21 21:35:10,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:35:10,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804164433] [2020-12-21 21:35:10,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:35:10,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:35:10,632 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2020-12-21 21:35:10,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804164433] [2020-12-21 21:35:10,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242792752] [2020-12-21 21:35:10,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:35:43,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-21 21:35:43,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:35:43,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 21:35:43,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:35:43,759 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2020-12-21 21:35:43,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:35:43,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-21 21:35:43,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817182851] [2020-12-21 21:35:43,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 21:35:43,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:35:43,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 21:35:43,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:35:43,762 INFO L87 Difference]: Start difference. First operand 107 states and 116 transitions. Second operand 13 states. [2020-12-21 21:35:44,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:35:44,002 INFO L93 Difference]: Finished difference Result 211 states and 237 transitions. [2020-12-21 21:35:44,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 21:35:44,003 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 104 [2020-12-21 21:35:44,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:35:44,004 INFO L225 Difference]: With dead ends: 211 [2020-12-21 21:35:44,004 INFO L226 Difference]: Without dead ends: 116 [2020-12-21 21:35:44,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:35:44,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-12-21 21:35:44,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2020-12-21 21:35:44,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-12-21 21:35:44,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 125 transitions. [2020-12-21 21:35:44,013 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 125 transitions. Word has length 104 [2020-12-21 21:35:44,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:35:44,013 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 125 transitions. [2020-12-21 21:35:44,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 21:35:44,013 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 125 transitions. [2020-12-21 21:35:44,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-21 21:35:44,014 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:35:44,014 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:35:44,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:35:44,216 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:35:44,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:35:44,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1477001240, now seen corresponding path program 10 times [2020-12-21 21:35:44,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:35:44,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112421487] [2020-12-21 21:35:44,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:35:44,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:35:44,408 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2020-12-21 21:35:44,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112421487] [2020-12-21 21:35:44,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509449139] [2020-12-21 21:35:44,409 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:35:44,530 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:35:44,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:35:44,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 21:35:44,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:35:44,646 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2020-12-21 21:35:44,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:35:44,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-21 21:35:44,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543347017] [2020-12-21 21:35:44,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 21:35:44,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:35:44,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 21:35:44,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:35:44,649 INFO L87 Difference]: Start difference. First operand 116 states and 125 transitions. Second operand 14 states. [2020-12-21 21:35:44,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:35:44,922 INFO L93 Difference]: Finished difference Result 228 states and 254 transitions. [2020-12-21 21:35:44,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 21:35:44,923 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 113 [2020-12-21 21:35:44,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:35:44,924 INFO L225 Difference]: With dead ends: 228 [2020-12-21 21:35:44,925 INFO L226 Difference]: Without dead ends: 125 [2020-12-21 21:35:44,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:35:44,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-12-21 21:35:44,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2020-12-21 21:35:44,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-21 21:35:44,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 134 transitions. [2020-12-21 21:35:44,933 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 134 transitions. Word has length 113 [2020-12-21 21:35:44,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:35:44,933 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 134 transitions. [2020-12-21 21:35:44,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 21:35:44,933 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 134 transitions. [2020-12-21 21:35:44,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-12-21 21:35:44,934 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:35:44,935 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:35:45,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:35:45,149 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:35:45,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:35:45,150 INFO L82 PathProgramCache]: Analyzing trace with hash -699288865, now seen corresponding path program 11 times [2020-12-21 21:35:45,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:35:45,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396234474] [2020-12-21 21:35:45,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:35:45,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:35:45,341 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2020-12-21 21:35:45,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396234474] [2020-12-21 21:35:45,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525441709] [2020-12-21 21:35:45,342 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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