/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/seq-mthreaded/pals_lcr.5.1.ufo.BOUNDED-10.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:33:46,103 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:33:46,105 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:33:46,140 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:33:46,140 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:33:46,142 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:33:46,143 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:33:46,146 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:33:46,148 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:33:46,149 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:33:46,150 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:33:46,152 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:33:46,152 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:33:46,154 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:33:46,155 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:33:46,156 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:33:46,157 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:33:46,159 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:33:46,170 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:33:46,179 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:33:46,182 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:33:46,187 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:33:46,189 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:33:46,192 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:33:46,200 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:33:46,219 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:33:46,220 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:33:46,220 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:33:46,222 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:33:46,273 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:33:46,273 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:33:46,277 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:33:46,278 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:33:46,278 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:33:46,278 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:33:46,278 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:33:46,279 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:33:46,279 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:33:46,279 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:33:46,280 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:33:46,280 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:33:46,280 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:33:46,281 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:33:46,281 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:33:46,281 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:33:46,281 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:33:46,281 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:33:46,282 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:33:46,282 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:33:46,282 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:33:46,282 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:33:46,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:33:46,283 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:33:46,283 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:33:46,283 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:33:46,685 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:33:46,712 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:33:46,716 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:33:46,717 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:33:46,718 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:33:46,719 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.5.1.ufo.BOUNDED-10.pals.c [2020-12-22 07:33:46,802 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5640f26cb/5e9d725d4f714dbdba68b1a70b32b353/FLAGc073025d1 [2020-12-22 07:33:47,413 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:33:47,414 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.5.1.ufo.BOUNDED-10.pals.c [2020-12-22 07:33:47,428 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5640f26cb/5e9d725d4f714dbdba68b1a70b32b353/FLAGc073025d1 [2020-12-22 07:33:47,728 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5640f26cb/5e9d725d4f714dbdba68b1a70b32b353 [2020-12-22 07:33:47,731 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:33:47,733 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:33:47,735 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:33:47,735 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:33:47,741 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:33:47,742 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:33:47" (1/1) ... [2020-12-22 07:33:47,743 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@254e82a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:33:47, skipping insertion in model container [2020-12-22 07:33:47,744 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:33:47" (1/1) ... [2020-12-22 07:33:47,752 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:33:47,785 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:33:48,011 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/seq-mthreaded/pals_lcr.5.1.ufo.BOUNDED-10.pals.c[11270,11283] [2020-12-22 07:33:48,014 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:33:48,025 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:33:48,099 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/seq-mthreaded/pals_lcr.5.1.ufo.BOUNDED-10.pals.c[11270,11283] [2020-12-22 07:33:48,100 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:33:48,122 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:33:48,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:33:48 WrapperNode [2020-12-22 07:33:48,123 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:33:48,125 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:33:48,125 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:33:48,125 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:33:48,135 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:33:48" (1/1) ... [2020-12-22 07:33:48,147 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:33:48" (1/1) ... [2020-12-22 07:33:48,193 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:33:48,194 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:33:48,194 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:33:48,195 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:33:48,212 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:33:48" (1/1) ... [2020-12-22 07:33:48,212 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:33:48" (1/1) ... [2020-12-22 07:33:48,217 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:33:48" (1/1) ... [2020-12-22 07:33:48,224 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:33:48" (1/1) ... [2020-12-22 07:33:48,242 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:33:48" (1/1) ... [2020-12-22 07:33:48,259 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:33:48" (1/1) ... [2020-12-22 07:33:48,264 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:33:48" (1/1) ... [2020-12-22 07:33:48,269 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:33:48,272 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:33:48,273 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:33:48,273 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:33:48,274 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:33:48" (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 [2020-12-22 07:33:48,366 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:33:48,367 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:33:48,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:33:48,367 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:33:49,248 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:33:49,248 INFO L299 CfgBuilder]: Removed 23 assume(true) statements. [2020-12-22 07:33:49,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:33:49 BoogieIcfgContainer [2020-12-22 07:33:49,250 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:33:49,252 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:33:49,252 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:33:49,256 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:33:49,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:33:47" (1/3) ... [2020-12-22 07:33:49,257 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34a2060c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:33:49, skipping insertion in model container [2020-12-22 07:33:49,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:33:48" (2/3) ... [2020-12-22 07:33:49,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34a2060c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:33:49, skipping insertion in model container [2020-12-22 07:33:49,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:33:49" (3/3) ... [2020-12-22 07:33:49,259 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.1.ufo.BOUNDED-10.pals.c [2020-12-22 07:33:49,266 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:33:49,271 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:33:49,290 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:33:49,318 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:33:49,318 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:33:49,318 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:33:49,318 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:33:49,318 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:33:49,319 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:33:49,319 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:33:49,319 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:33:49,336 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states. [2020-12-22 07:33:49,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-22 07:33:49,344 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:33:49,345 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, 1] [2020-12-22 07:33:49,346 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:33:49,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:33:49,352 INFO L82 PathProgramCache]: Analyzing trace with hash 8392247, now seen corresponding path program 1 times [2020-12-22 07:33:49,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:33:49,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988401105] [2020-12-22 07:33:49,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:33:49,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:33:49,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:33:49,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988401105] [2020-12-22 07:33:49,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:33:49,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:33:49,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129438000] [2020-12-22 07:33:49,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:33:49,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:33:49,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:33:49,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:33:49,597 INFO L87 Difference]: Start difference. First operand 93 states. Second operand 2 states. [2020-12-22 07:33:49,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:33:49,635 INFO L93 Difference]: Finished difference Result 150 states and 246 transitions. [2020-12-22 07:33:49,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:33:49,636 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 33 [2020-12-22 07:33:49,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:33:49,648 INFO L225 Difference]: With dead ends: 150 [2020-12-22 07:33:49,648 INFO L226 Difference]: Without dead ends: 89 [2020-12-22 07:33:49,652 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 [2020-12-22 07:33:49,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-22 07:33:49,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-12-22 07:33:49,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-22 07:33:49,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 150 transitions. [2020-12-22 07:33:49,700 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 150 transitions. Word has length 33 [2020-12-22 07:33:49,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:33:49,700 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 150 transitions. [2020-12-22 07:33:49,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:33:49,701 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 150 transitions. [2020-12-22 07:33:49,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-22 07:33:49,703 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:33:49,703 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, 1] [2020-12-22 07:33:49,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:33:49,704 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:33:49,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:33:49,705 INFO L82 PathProgramCache]: Analyzing trace with hash -501080843, now seen corresponding path program 1 times [2020-12-22 07:33:49,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:33:49,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031199367] [2020-12-22 07:33:49,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:33:49,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:33:49,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:33:49,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031199367] [2020-12-22 07:33:49,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:33:49,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:33:49,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491678293] [2020-12-22 07:33:49,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:33:49,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:33:49,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:33:49,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:33:49,861 INFO L87 Difference]: Start difference. First operand 89 states and 150 transitions. Second operand 5 states. [2020-12-22 07:33:49,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:33:49,957 INFO L93 Difference]: Finished difference Result 145 states and 236 transitions. [2020-12-22 07:33:49,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:33:49,958 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-12-22 07:33:49,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:33:49,960 INFO L225 Difference]: With dead ends: 145 [2020-12-22 07:33:49,960 INFO L226 Difference]: Without dead ends: 89 [2020-12-22 07:33:49,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:33:49,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-22 07:33:49,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-12-22 07:33:49,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-22 07:33:49,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 119 transitions. [2020-12-22 07:33:49,973 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 119 transitions. Word has length 33 [2020-12-22 07:33:49,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:33:49,974 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 119 transitions. [2020-12-22 07:33:49,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:33:49,974 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 119 transitions. [2020-12-22 07:33:49,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 07:33:49,976 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:33:49,977 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, 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] [2020-12-22 07:33:49,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:33:49,977 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:33:49,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:33:49,978 INFO L82 PathProgramCache]: Analyzing trace with hash 988628396, now seen corresponding path program 1 times [2020-12-22 07:33:49,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:33:49,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961722193] [2020-12-22 07:33:49,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:33:50,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:33:50,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:33:50,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961722193] [2020-12-22 07:33:50,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:33:50,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:33:50,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391528432] [2020-12-22 07:33:50,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:33:50,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:33:50,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:33:50,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:33:50,194 INFO L87 Difference]: Start difference. First operand 89 states and 119 transitions. Second operand 3 states. [2020-12-22 07:33:50,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:33:50,257 INFO L93 Difference]: Finished difference Result 187 states and 273 transitions. [2020-12-22 07:33:50,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:33:50,259 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 07:33:50,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:33:50,264 INFO L225 Difference]: With dead ends: 187 [2020-12-22 07:33:50,264 INFO L226 Difference]: Without dead ends: 135 [2020-12-22 07:33:50,266 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 [2020-12-22 07:33:50,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-12-22 07:33:50,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 133. [2020-12-22 07:33:50,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-12-22 07:33:50,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 189 transitions. [2020-12-22 07:33:50,292 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 189 transitions. Word has length 63 [2020-12-22 07:33:50,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:33:50,293 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 189 transitions. [2020-12-22 07:33:50,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:33:50,293 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 189 transitions. [2020-12-22 07:33:50,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 07:33:50,295 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:33:50,295 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, 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] [2020-12-22 07:33:50,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:33:50,296 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:33:50,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:33:50,297 INFO L82 PathProgramCache]: Analyzing trace with hash 243045666, now seen corresponding path program 1 times [2020-12-22 07:33:50,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:33:50,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871708947] [2020-12-22 07:33:50,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:33:50,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:33:50,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:33:50,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871708947] [2020-12-22 07:33:50,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:33:50,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:33:50,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353071538] [2020-12-22 07:33:50,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:33:50,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:33:50,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:33:50,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:33:50,408 INFO L87 Difference]: Start difference. First operand 133 states and 189 transitions. Second operand 3 states. [2020-12-22 07:33:50,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:33:50,438 INFO L93 Difference]: Finished difference Result 313 states and 473 transitions. [2020-12-22 07:33:50,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:33:50,440 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 07:33:50,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:33:50,445 INFO L225 Difference]: With dead ends: 313 [2020-12-22 07:33:50,445 INFO L226 Difference]: Without dead ends: 217 [2020-12-22 07:33:50,450 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 [2020-12-22 07:33:50,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-12-22 07:33:50,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 215. [2020-12-22 07:33:50,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-12-22 07:33:50,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 318 transitions. [2020-12-22 07:33:50,497 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 318 transitions. Word has length 63 [2020-12-22 07:33:50,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:33:50,498 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 318 transitions. [2020-12-22 07:33:50,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:33:50,500 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 318 transitions. [2020-12-22 07:33:50,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 07:33:50,504 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:33:50,505 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, 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] [2020-12-22 07:33:50,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:33:50,505 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:33:50,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:33:50,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1696985192, now seen corresponding path program 1 times [2020-12-22 07:33:50,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:33:50,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019436338] [2020-12-22 07:33:50,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:33:50,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:33:50,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:33:50,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019436338] [2020-12-22 07:33:50,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:33:50,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:33:50,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652977814] [2020-12-22 07:33:50,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:33:50,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:33:50,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:33:50,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:33:50,642 INFO L87 Difference]: Start difference. First operand 215 states and 318 transitions. Second operand 3 states. [2020-12-22 07:33:50,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:33:50,677 INFO L93 Difference]: Finished difference Result 547 states and 840 transitions. [2020-12-22 07:33:50,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:33:50,678 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 07:33:50,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:33:50,681 INFO L225 Difference]: With dead ends: 547 [2020-12-22 07:33:50,681 INFO L226 Difference]: Without dead ends: 369 [2020-12-22 07:33:50,682 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 [2020-12-22 07:33:50,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2020-12-22 07:33:50,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 367. [2020-12-22 07:33:50,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367 states. [2020-12-22 07:33:50,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 554 transitions. [2020-12-22 07:33:50,714 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 554 transitions. Word has length 63 [2020-12-22 07:33:50,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:33:50,714 INFO L481 AbstractCegarLoop]: Abstraction has 367 states and 554 transitions. [2020-12-22 07:33:50,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:33:50,715 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 554 transitions. [2020-12-22 07:33:50,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 07:33:50,716 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:33:50,716 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, 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] [2020-12-22 07:33:50,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:33:50,717 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:33:50,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:33:50,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1003697422, now seen corresponding path program 1 times [2020-12-22 07:33:50,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:33:50,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977973727] [2020-12-22 07:33:50,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:33:50,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:33:50,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:33:50,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977973727] [2020-12-22 07:33:50,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:33:50,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:33:50,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150942039] [2020-12-22 07:33:50,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:33:50,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:33:50,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:33:50,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:33:50,852 INFO L87 Difference]: Start difference. First operand 367 states and 554 transitions. Second operand 3 states. [2020-12-22 07:33:50,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:33:50,896 INFO L93 Difference]: Finished difference Result 979 states and 1508 transitions. [2020-12-22 07:33:50,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:33:50,896 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 07:33:50,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:33:50,901 INFO L225 Difference]: With dead ends: 979 [2020-12-22 07:33:50,901 INFO L226 Difference]: Without dead ends: 649 [2020-12-22 07:33:50,903 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 [2020-12-22 07:33:50,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2020-12-22 07:33:50,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 647. [2020-12-22 07:33:50,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 647 states. [2020-12-22 07:33:50,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 982 transitions. [2020-12-22 07:33:50,953 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 982 transitions. Word has length 63 [2020-12-22 07:33:50,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:33:50,956 INFO L481 AbstractCegarLoop]: Abstraction has 647 states and 982 transitions. [2020-12-22 07:33:50,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:33:50,956 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 982 transitions. [2020-12-22 07:33:50,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 07:33:50,963 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:33:50,963 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, 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] [2020-12-22 07:33:50,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:33:50,964 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:33:50,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:33:50,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1341490564, now seen corresponding path program 1 times [2020-12-22 07:33:50,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:33:50,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769631753] [2020-12-22 07:33:50,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:33:51,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:33:51,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:33:51,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769631753] [2020-12-22 07:33:51,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:33:51,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:33:51,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713442846] [2020-12-22 07:33:51,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:33:51,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:33:51,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:33:51,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:33:51,097 INFO L87 Difference]: Start difference. First operand 647 states and 982 transitions. Second operand 3 states. [2020-12-22 07:33:51,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:33:51,157 INFO L93 Difference]: Finished difference Result 1771 states and 2712 transitions. [2020-12-22 07:33:51,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:33:51,158 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 07:33:51,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:33:51,166 INFO L225 Difference]: With dead ends: 1771 [2020-12-22 07:33:51,167 INFO L226 Difference]: Without dead ends: 1161 [2020-12-22 07:33:51,169 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 [2020-12-22 07:33:51,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2020-12-22 07:33:51,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 1159. [2020-12-22 07:33:51,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1159 states. [2020-12-22 07:33:51,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1159 states to 1159 states and 1750 transitions. [2020-12-22 07:33:51,252 INFO L78 Accepts]: Start accepts. Automaton has 1159 states and 1750 transitions. Word has length 63 [2020-12-22 07:33:51,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:33:51,252 INFO L481 AbstractCegarLoop]: Abstraction has 1159 states and 1750 transitions. [2020-12-22 07:33:51,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:33:51,253 INFO L276 IsEmpty]: Start isEmpty. Operand 1159 states and 1750 transitions. [2020-12-22 07:33:51,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 07:33:51,255 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:33:51,256 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, 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] [2020-12-22 07:33:51,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:33:51,256 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:33:51,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:33:51,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1735491334, now seen corresponding path program 1 times [2020-12-22 07:33:51,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:33:51,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853525570] [2020-12-22 07:33:51,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:33:51,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:33:51,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:33:51,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853525570] [2020-12-22 07:33:51,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:33:51,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:33:51,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613238178] [2020-12-22 07:33:51,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:33:51,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:33:51,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:33:51,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:33:51,414 INFO L87 Difference]: Start difference. First operand 1159 states and 1750 transitions. Second operand 7 states. [2020-12-22 07:33:52,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:33:52,101 INFO L93 Difference]: Finished difference Result 12379 states and 18880 transitions. [2020-12-22 07:33:52,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 07:33:52,101 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 63 [2020-12-22 07:33:52,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:33:52,161 INFO L225 Difference]: With dead ends: 12379 [2020-12-22 07:33:52,161 INFO L226 Difference]: Without dead ends: 11257 [2020-12-22 07:33:52,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-12-22 07:33:52,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11257 states. [2020-12-22 07:33:52,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11257 to 2279. [2020-12-22 07:33:52,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2279 states. [2020-12-22 07:33:52,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2279 states to 2279 states and 3398 transitions. [2020-12-22 07:33:52,465 INFO L78 Accepts]: Start accepts. Automaton has 2279 states and 3398 transitions. Word has length 63 [2020-12-22 07:33:52,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:33:52,467 INFO L481 AbstractCegarLoop]: Abstraction has 2279 states and 3398 transitions. [2020-12-22 07:33:52,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:33:52,467 INFO L276 IsEmpty]: Start isEmpty. Operand 2279 states and 3398 transitions. [2020-12-22 07:33:52,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 07:33:52,468 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:33:52,468 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, 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, 1] [2020-12-22 07:33:52,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:33:52,469 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:33:52,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:33:52,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1519410410, now seen corresponding path program 1 times [2020-12-22 07:33:52,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:33:52,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006435406] [2020-12-22 07:33:52,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:33:52,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:33:52,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:33:52,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006435406] [2020-12-22 07:33:52,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:33:52,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:33:52,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330650428] [2020-12-22 07:33:52,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:33:52,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:33:52,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:33:52,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:33:52,572 INFO L87 Difference]: Start difference. First operand 2279 states and 3398 transitions. Second operand 3 states. [2020-12-22 07:33:52,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:33:52,812 INFO L93 Difference]: Finished difference Result 5565 states and 8314 transitions. [2020-12-22 07:33:52,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:33:52,812 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 07:33:52,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:33:52,828 INFO L225 Difference]: With dead ends: 5565 [2020-12-22 07:33:52,828 INFO L226 Difference]: Without dead ends: 3323 [2020-12-22 07:33:52,832 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 [2020-12-22 07:33:52,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3323 states. [2020-12-22 07:33:53,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3323 to 3321. [2020-12-22 07:33:53,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3321 states. [2020-12-22 07:33:53,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3321 states to 3321 states and 4904 transitions. [2020-12-22 07:33:53,075 INFO L78 Accepts]: Start accepts. Automaton has 3321 states and 4904 transitions. Word has length 65 [2020-12-22 07:33:53,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:33:53,076 INFO L481 AbstractCegarLoop]: Abstraction has 3321 states and 4904 transitions. [2020-12-22 07:33:53,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:33:53,076 INFO L276 IsEmpty]: Start isEmpty. Operand 3321 states and 4904 transitions. [2020-12-22 07:33:53,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 07:33:53,078 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:33:53,078 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, 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, 1] [2020-12-22 07:33:53,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:33:53,079 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:33:53,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:33:53,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1585903922, now seen corresponding path program 1 times [2020-12-22 07:33:53,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:33:53,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605158657] [2020-12-22 07:33:53,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:33:53,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:33:53,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:33:53,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605158657] [2020-12-22 07:33:53,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:33:53,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:33:53,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952669786] [2020-12-22 07:33:53,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:33:53,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:33:53,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:33:53,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:33:53,317 INFO L87 Difference]: Start difference. First operand 3321 states and 4904 transitions. Second operand 7 states. [2020-12-22 07:33:53,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:33:53,689 INFO L93 Difference]: Finished difference Result 6605 states and 9770 transitions. [2020-12-22 07:33:53,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 07:33:53,690 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 65 [2020-12-22 07:33:53,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:33:53,711 INFO L225 Difference]: With dead ends: 6605 [2020-12-22 07:33:53,712 INFO L226 Difference]: Without dead ends: 3323 [2020-12-22 07:33:53,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-12-22 07:33:53,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3323 states. [2020-12-22 07:33:53,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3323 to 3321. [2020-12-22 07:33:53,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3321 states. [2020-12-22 07:33:53,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3321 states to 3321 states and 4856 transitions. [2020-12-22 07:33:53,952 INFO L78 Accepts]: Start accepts. Automaton has 3321 states and 4856 transitions. Word has length 65 [2020-12-22 07:33:53,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:33:53,952 INFO L481 AbstractCegarLoop]: Abstraction has 3321 states and 4856 transitions. [2020-12-22 07:33:53,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:33:53,952 INFO L276 IsEmpty]: Start isEmpty. Operand 3321 states and 4856 transitions. [2020-12-22 07:33:53,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 07:33:53,953 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:33:53,953 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, 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, 1, 1] [2020-12-22 07:33:53,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:33:53,954 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:33:53,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:33:53,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1503658279, now seen corresponding path program 1 times [2020-12-22 07:33:53,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:33:53,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451979816] [2020-12-22 07:33:53,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:33:54,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:33:54,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:33:54,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451979816] [2020-12-22 07:33:54,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:33:54,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:33:54,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276559583] [2020-12-22 07:33:54,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:33:54,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:33:54,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:33:54,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:33:54,116 INFO L87 Difference]: Start difference. First operand 3321 states and 4856 transitions. Second operand 8 states. [2020-12-22 07:33:54,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:33:54,672 INFO L93 Difference]: Finished difference Result 6164 states and 8906 transitions. [2020-12-22 07:33:54,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 07:33:54,672 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 66 [2020-12-22 07:33:54,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:33:54,717 INFO L225 Difference]: With dead ends: 6164 [2020-12-22 07:33:54,717 INFO L226 Difference]: Without dead ends: 6162 [2020-12-22 07:33:54,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 07:33:54,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6162 states. [2020-12-22 07:33:55,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6162 to 3513. [2020-12-22 07:33:55,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3513 states. [2020-12-22 07:33:55,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3513 states to 3513 states and 5032 transitions. [2020-12-22 07:33:55,018 INFO L78 Accepts]: Start accepts. Automaton has 3513 states and 5032 transitions. Word has length 66 [2020-12-22 07:33:55,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:33:55,018 INFO L481 AbstractCegarLoop]: Abstraction has 3513 states and 5032 transitions. [2020-12-22 07:33:55,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:33:55,018 INFO L276 IsEmpty]: Start isEmpty. Operand 3513 states and 5032 transitions. [2020-12-22 07:33:55,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 07:33:55,022 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:33:55,022 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:33:55,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:33:55,023 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:33:55,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:33:55,023 INFO L82 PathProgramCache]: Analyzing trace with hash 550206538, now seen corresponding path program 1 times [2020-12-22 07:33:55,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:33:55,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265678529] [2020-12-22 07:33:55,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:33:55,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:33:55,217 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 07:33:55,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265678529] [2020-12-22 07:33:55,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:33:55,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:33:55,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711870314] [2020-12-22 07:33:55,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:33:55,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:33:55,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:33:55,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:33:55,220 INFO L87 Difference]: Start difference. First operand 3513 states and 5032 transitions. Second operand 7 states. [2020-12-22 07:33:56,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:33:56,522 INFO L93 Difference]: Finished difference Result 21589 states and 30958 transitions. [2020-12-22 07:33:56,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 07:33:56,523 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 07:33:56,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:33:56,561 INFO L225 Difference]: With dead ends: 21589 [2020-12-22 07:33:56,562 INFO L226 Difference]: Without dead ends: 18115 [2020-12-22 07:33:56,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 07:33:56,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18115 states. [2020-12-22 07:33:57,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18115 to 6985. [2020-12-22 07:33:57,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6985 states. [2020-12-22 07:33:57,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6985 states to 6985 states and 9976 transitions. [2020-12-22 07:33:57,236 INFO L78 Accepts]: Start accepts. Automaton has 6985 states and 9976 transitions. Word has length 94 [2020-12-22 07:33:57,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:33:57,236 INFO L481 AbstractCegarLoop]: Abstraction has 6985 states and 9976 transitions. [2020-12-22 07:33:57,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:33:57,236 INFO L276 IsEmpty]: Start isEmpty. Operand 6985 states and 9976 transitions. [2020-12-22 07:33:57,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 07:33:57,241 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:33:57,241 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:33:57,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:33:57,242 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:33:57,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:33:57,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1218576278, now seen corresponding path program 1 times [2020-12-22 07:33:57,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:33:57,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883898998] [2020-12-22 07:33:57,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:33:57,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:33:57,422 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 07:33:57,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883898998] [2020-12-22 07:33:57,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:33:57,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:33:57,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361084343] [2020-12-22 07:33:57,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:33:57,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:33:57,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:33:57,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:33:57,425 INFO L87 Difference]: Start difference. First operand 6985 states and 9976 transitions. Second operand 7 states. [2020-12-22 07:33:58,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:33:58,771 INFO L93 Difference]: Finished difference Result 25061 states and 35902 transitions. [2020-12-22 07:33:58,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 07:33:58,772 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 07:33:58,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:33:58,819 INFO L225 Difference]: With dead ends: 25061 [2020-12-22 07:33:58,819 INFO L226 Difference]: Without dead ends: 21587 [2020-12-22 07:33:58,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 07:33:58,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21587 states. [2020-12-22 07:33:59,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21587 to 12201. [2020-12-22 07:33:59,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12201 states. [2020-12-22 07:33:59,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12201 states to 12201 states and 17352 transitions. [2020-12-22 07:33:59,756 INFO L78 Accepts]: Start accepts. Automaton has 12201 states and 17352 transitions. Word has length 94 [2020-12-22 07:33:59,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:33:59,756 INFO L481 AbstractCegarLoop]: Abstraction has 12201 states and 17352 transitions. [2020-12-22 07:33:59,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:33:59,757 INFO L276 IsEmpty]: Start isEmpty. Operand 12201 states and 17352 transitions. [2020-12-22 07:33:59,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 07:33:59,761 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:33:59,762 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:33:59,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:33:59,762 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:33:59,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:33:59,763 INFO L82 PathProgramCache]: Analyzing trace with hash -86936438, now seen corresponding path program 1 times [2020-12-22 07:33:59,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:33:59,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644488022] [2020-12-22 07:33:59,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:33:59,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:33:59,876 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 07:33:59,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644488022] [2020-12-22 07:33:59,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:33:59,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:33:59,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455717650] [2020-12-22 07:33:59,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:33:59,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:33:59,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:33:59,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:33:59,879 INFO L87 Difference]: Start difference. First operand 12201 states and 17352 transitions. Second operand 7 states. [2020-12-22 07:34:01,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:34:01,446 INFO L93 Difference]: Finished difference Result 28533 states and 40846 transitions. [2020-12-22 07:34:01,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 07:34:01,447 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 07:34:01,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:34:01,494 INFO L225 Difference]: With dead ends: 28533 [2020-12-22 07:34:01,495 INFO L226 Difference]: Without dead ends: 25059 [2020-12-22 07:34:01,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 07:34:01,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25059 states. [2020-12-22 07:34:02,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25059 to 15673. [2020-12-22 07:34:02,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15673 states. [2020-12-22 07:34:02,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15673 states to 15673 states and 22296 transitions. [2020-12-22 07:34:02,417 INFO L78 Accepts]: Start accepts. Automaton has 15673 states and 22296 transitions. Word has length 94 [2020-12-22 07:34:02,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:34:02,417 INFO L481 AbstractCegarLoop]: Abstraction has 15673 states and 22296 transitions. [2020-12-22 07:34:02,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:34:02,417 INFO L276 IsEmpty]: Start isEmpty. Operand 15673 states and 22296 transitions. [2020-12-22 07:34:02,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 07:34:02,423 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:34:02,423 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:34:02,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:34:02,423 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:34:02,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:34:02,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1322395478, now seen corresponding path program 1 times [2020-12-22 07:34:02,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:34:02,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715706563] [2020-12-22 07:34:02,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:34:02,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:34:02,624 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 07:34:02,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715706563] [2020-12-22 07:34:02,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:34:02,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:34:02,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183095013] [2020-12-22 07:34:02,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:34:02,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:34:02,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:34:02,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:34:02,626 INFO L87 Difference]: Start difference. First operand 15673 states and 22296 transitions. Second operand 7 states. [2020-12-22 07:34:04,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:34:04,073 INFO L93 Difference]: Finished difference Result 32005 states and 45790 transitions. [2020-12-22 07:34:04,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 07:34:04,073 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 07:34:04,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:34:04,122 INFO L225 Difference]: With dead ends: 32005 [2020-12-22 07:34:04,122 INFO L226 Difference]: Without dead ends: 28531 [2020-12-22 07:34:04,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 07:34:04,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28531 states. [2020-12-22 07:34:05,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28531 to 19145. [2020-12-22 07:34:05,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19145 states. [2020-12-22 07:34:05,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19145 states to 19145 states and 27240 transitions. [2020-12-22 07:34:05,638 INFO L78 Accepts]: Start accepts. Automaton has 19145 states and 27240 transitions. Word has length 94 [2020-12-22 07:34:05,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:34:05,638 INFO L481 AbstractCegarLoop]: Abstraction has 19145 states and 27240 transitions. [2020-12-22 07:34:05,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:34:05,639 INFO L276 IsEmpty]: Start isEmpty. Operand 19145 states and 27240 transitions. [2020-12-22 07:34:05,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 07:34:05,645 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:34:05,645 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:34:05,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:34:05,645 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:34:05,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:34:05,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1551576266, now seen corresponding path program 1 times [2020-12-22 07:34:05,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:34:05,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363007790] [2020-12-22 07:34:05,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:34:05,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:34:05,810 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 07:34:05,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363007790] [2020-12-22 07:34:05,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:34:05,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:34:05,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007560248] [2020-12-22 07:34:05,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:34:05,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:34:05,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:34:05,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:34:05,813 INFO L87 Difference]: Start difference. First operand 19145 states and 27240 transitions. Second operand 7 states. [2020-12-22 07:34:07,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:34:07,613 INFO L93 Difference]: Finished difference Result 33397 states and 47790 transitions. [2020-12-22 07:34:07,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 07:34:07,613 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 07:34:07,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:34:07,668 INFO L225 Difference]: With dead ends: 33397 [2020-12-22 07:34:07,668 INFO L226 Difference]: Without dead ends: 30963 [2020-12-22 07:34:07,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 07:34:07,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30963 states. [2020-12-22 07:34:09,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30963 to 21577. [2020-12-22 07:34:09,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21577 states. [2020-12-22 07:34:09,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21577 states to 21577 states and 30728 transitions. [2020-12-22 07:34:09,132 INFO L78 Accepts]: Start accepts. Automaton has 21577 states and 30728 transitions. Word has length 94 [2020-12-22 07:34:09,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:34:09,133 INFO L481 AbstractCegarLoop]: Abstraction has 21577 states and 30728 transitions. [2020-12-22 07:34:09,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:34:09,133 INFO L276 IsEmpty]: Start isEmpty. Operand 21577 states and 30728 transitions. [2020-12-22 07:34:09,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 07:34:09,143 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:34:09,143 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:34:09,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:34:09,143 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:34:09,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:34:09,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1418973216, now seen corresponding path program 1 times [2020-12-22 07:34:09,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:34:09,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307640432] [2020-12-22 07:34:09,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:34:09,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:34:09,296 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 07:34:09,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307640432] [2020-12-22 07:34:09,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239289883] [2020-12-22 07:34:09,298 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 [2020-12-22 07:34:09,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:34:09,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 07:34:09,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:34:09,778 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 07:34:09,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:34:09,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 7 [2020-12-22 07:34:09,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040374479] [2020-12-22 07:34:09,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:34:09,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:34:09,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:34:09,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:34:09,780 INFO L87 Difference]: Start difference. First operand 21577 states and 30728 transitions. Second operand 7 states. [2020-12-22 07:34:12,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:34:12,596 INFO L93 Difference]: Finished difference Result 51370 states and 73576 transitions. [2020-12-22 07:34:12,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:34:12,596 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-12-22 07:34:12,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:34:12,656 INFO L225 Difference]: With dead ends: 51370 [2020-12-22 07:34:12,656 INFO L226 Difference]: Without dead ends: 35560 [2020-12-22 07:34:12,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:34:12,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35560 states. [2020-12-22 07:34:15,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35560 to 35033. [2020-12-22 07:34:15,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35033 states. [2020-12-22 07:34:15,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35033 states to 35033 states and 49544 transitions. [2020-12-22 07:34:15,578 INFO L78 Accepts]: Start accepts. Automaton has 35033 states and 49544 transitions. Word has length 95 [2020-12-22 07:34:15,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:34:15,578 INFO L481 AbstractCegarLoop]: Abstraction has 35033 states and 49544 transitions. [2020-12-22 07:34:15,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:34:15,579 INFO L276 IsEmpty]: Start isEmpty. Operand 35033 states and 49544 transitions. [2020-12-22 07:34:15,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 07:34:15,586 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:34:15,586 INFO L422 BasicCegarLoop]: trace histogram [2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:34:15,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 07:34:15,800 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:34:15,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:34:15,801 INFO L82 PathProgramCache]: Analyzing trace with hash -881696638, now seen corresponding path program 1 times [2020-12-22 07:34:15,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:34:15,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859103953] [2020-12-22 07:34:15,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:34:15,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:34:16,017 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:34:16,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859103953] [2020-12-22 07:34:16,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414734199] [2020-12-22 07:34:16,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-12-22 07:34:16,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:34:16,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 07:34:16,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:34:16,371 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 07:34:16,607 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:34:16,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:34:16,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 07:34:16,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150901148] [2020-12-22 07:34:16,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 07:34:16,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:34:16,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 07:34:16,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2020-12-22 07:34:16,609 INFO L87 Difference]: Start difference. First operand 35033 states and 49544 transitions. Second operand 17 states. [2020-12-22 07:34:17,119 WARN L197 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-12-22 07:34:55,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:34:55,154 INFO L93 Difference]: Finished difference Result 437013 states and 608602 transitions. [2020-12-22 07:34:55,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2020-12-22 07:34:55,155 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 96 [2020-12-22 07:34:55,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:34:56,049 INFO L225 Difference]: With dead ends: 437013 [2020-12-22 07:34:56,050 INFO L226 Difference]: Without dead ends: 402019 [2020-12-22 07:34:56,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7040 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=2549, Invalid=15541, Unknown=0, NotChecked=0, Total=18090 [2020-12-22 07:34:56,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402019 states. [2020-12-22 07:35:11,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402019 to 163685. [2020-12-22 07:35:11,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163685 states. [2020-12-22 07:35:12,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163685 states to 163685 states and 228864 transitions. [2020-12-22 07:35:12,192 INFO L78 Accepts]: Start accepts. Automaton has 163685 states and 228864 transitions. Word has length 96 [2020-12-22 07:35:12,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:12,192 INFO L481 AbstractCegarLoop]: Abstraction has 163685 states and 228864 transitions. [2020-12-22 07:35:12,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 07:35:12,193 INFO L276 IsEmpty]: Start isEmpty. Operand 163685 states and 228864 transitions. [2020-12-22 07:35:12,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 07:35:12,203 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:12,203 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 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] [2020-12-22 07:35:12,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 07:35:12,418 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:12,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:12,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1531112692, now seen corresponding path program 1 times [2020-12-22 07:35:12,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:12,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276197335] [2020-12-22 07:35:12,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:12,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:12,915 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:35:12,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276197335] [2020-12-22 07:35:12,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871982684] [2020-12-22 07:35:12,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-12-22 07:35:13,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:13,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 07:35:13,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:35:13,246 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 07:35:13,642 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:35:13,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:35:13,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 07:35:13,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104942885] [2020-12-22 07:35:13,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 07:35:13,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:13,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 07:35:13,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2020-12-22 07:35:13,645 INFO L87 Difference]: Start difference. First operand 163685 states and 228864 transitions. Second operand 17 states. [2020-12-22 07:35:28,501 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2020-12-22 07:35:28,936 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50