/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/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label02.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:03:21,992 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:03:21,995 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:03:22,030 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:03:22,030 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:03:22,032 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:03:22,034 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:03:22,036 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:03:22,039 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:03:22,040 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:03:22,041 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:03:22,043 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:03:22,044 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:03:22,045 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:03:22,046 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:03:22,048 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:03:22,049 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:03:22,050 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:03:22,053 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:03:22,058 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:03:22,064 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:03:22,066 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:03:22,068 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:03:22,069 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:03:22,072 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:03:22,087 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:03:22,088 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:03:22,089 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:03:22,096 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:03:22,128 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:03:22,128 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:03:22,130 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:03:22,130 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:03:22,130 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:03:22,131 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:03:22,131 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:03:22,131 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:03:22,131 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:03:22,132 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:03:22,132 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:03:22,132 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:03:22,132 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:03:22,133 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:03:22,133 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:03:22,133 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:03:22,133 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:03:22,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:03:22,134 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:03:22,134 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:03:22,134 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:03:22,135 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:03:22,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:03:22,135 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:03:22,135 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:03:22,135 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:03:22,585 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:03:22,619 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:03:22,623 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:03:22,624 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:03:22,625 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:03:22,627 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label02.c [2020-12-22 10:03:22,715 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/173143ea8/75b233b35f014436bafcd617f25b165b/FLAGe52fc0383 [2020-12-22 10:03:23,818 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:03:23,819 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label02.c [2020-12-22 10:03:23,875 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/173143ea8/75b233b35f014436bafcd617f25b165b/FLAGe52fc0383 [2020-12-22 10:03:24,178 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/173143ea8/75b233b35f014436bafcd617f25b165b [2020-12-22 10:03:24,183 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:03:24,186 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:03:24,190 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:03:24,190 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:03:24,195 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:03:24,196 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:03:24" (1/1) ... [2020-12-22 10:03:24,198 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24848198 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:03:24, skipping insertion in model container [2020-12-22 10:03:24,198 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:03:24" (1/1) ... [2020-12-22 10:03:24,207 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:03:24,460 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:03:24,870 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/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label02.c[15586,15599] [2020-12-22 10:03:24,987 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/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label02.c[22633,22646] [2020-12-22 10:03:25,894 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:03:25,910 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:03:25,989 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/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label02.c[15586,15599] [2020-12-22 10:03:26,036 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/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label02.c[22633,22646] [2020-12-22 10:03:26,692 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:03:26,740 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:03:26,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:03:26 WrapperNode [2020-12-22 10:03:26,741 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:03:26,743 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:03:26,743 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:03:26,746 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:03:26,755 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:03:26" (1/1) ... [2020-12-22 10:03:26,838 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:03:26" (1/1) ... [2020-12-22 10:03:27,262 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:03:27,265 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:03:27,266 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:03:27,266 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:03:27,276 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:03:26" (1/1) ... [2020-12-22 10:03:27,277 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:03:26" (1/1) ... [2020-12-22 10:03:27,329 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:03:26" (1/1) ... [2020-12-22 10:03:27,330 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:03:26" (1/1) ... [2020-12-22 10:03:27,595 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:03:26" (1/1) ... [2020-12-22 10:03:27,642 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:03:26" (1/1) ... [2020-12-22 10:03:27,736 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:03:26" (1/1) ... [2020-12-22 10:03:27,847 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:03:27,849 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:03:27,849 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:03:27,849 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:03:27,850 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:03:26" (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 10:03:27,982 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:03:27,983 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:03:27,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:03:27,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:03:33,137 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:03:33,138 INFO L299 CfgBuilder]: Removed 38 assume(true) statements. [2020-12-22 10:03:33,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:03:33 BoogieIcfgContainer [2020-12-22 10:03:33,142 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:03:33,144 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:03:33,144 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:03:33,148 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:03:33,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:03:24" (1/3) ... [2020-12-22 10:03:33,149 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6943a41d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:03:33, skipping insertion in model container [2020-12-22 10:03:33,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:03:26" (2/3) ... [2020-12-22 10:03:33,150 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6943a41d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:03:33, skipping insertion in model container [2020-12-22 10:03:33,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:03:33" (3/3) ... [2020-12-22 10:03:33,152 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label02.c [2020-12-22 10:03:33,159 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:03:33,166 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:03:33,187 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:03:33,224 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:03:33,225 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:03:33,225 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:03:33,225 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:03:33,225 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:03:33,225 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:03:33,225 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:03:33,226 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:03:33,263 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states. [2020-12-22 10:03:33,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 10:03:33,274 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:33,276 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] [2020-12-22 10:03:33,276 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:33,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:33,284 INFO L82 PathProgramCache]: Analyzing trace with hash 340623278, now seen corresponding path program 1 times [2020-12-22 10:03:33,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:33,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424778998] [2020-12-22 10:03:33,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:33,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:33,579 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 10:03:33,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424778998] [2020-12-22 10:03:33,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:33,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:03:33,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378410937] [2020-12-22 10:03:33,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 10:03:33,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:33,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 10:03:33,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:03:33,612 INFO L87 Difference]: Start difference. First operand 926 states. Second operand 2 states. [2020-12-22 10:03:33,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:03:33,716 INFO L93 Difference]: Finished difference Result 1806 states and 3418 transitions. [2020-12-22 10:03:33,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 10:03:33,718 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 38 [2020-12-22 10:03:33,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:03:33,758 INFO L225 Difference]: With dead ends: 1806 [2020-12-22 10:03:33,758 INFO L226 Difference]: Without dead ends: 860 [2020-12-22 10:03:33,769 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 10:03:33,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2020-12-22 10:03:33,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 860. [2020-12-22 10:03:33,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 860 states. [2020-12-22 10:03:33,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1620 transitions. [2020-12-22 10:03:33,901 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1620 transitions. Word has length 38 [2020-12-22 10:03:33,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:03:33,901 INFO L481 AbstractCegarLoop]: Abstraction has 860 states and 1620 transitions. [2020-12-22 10:03:33,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 10:03:33,902 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1620 transitions. [2020-12-22 10:03:33,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 10:03:33,910 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:33,911 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] [2020-12-22 10:03:33,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:03:33,911 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:33,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:33,912 INFO L82 PathProgramCache]: Analyzing trace with hash 615382892, now seen corresponding path program 1 times [2020-12-22 10:03:33,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:33,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652095990] [2020-12-22 10:03:33,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:34,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:34,141 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 10:03:34,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652095990] [2020-12-22 10:03:34,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:34,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:03:34,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875599310] [2020-12-22 10:03:34,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:03:34,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:34,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:03:34,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:03:34,145 INFO L87 Difference]: Start difference. First operand 860 states and 1620 transitions. Second operand 5 states. [2020-12-22 10:03:34,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:03:34,271 INFO L93 Difference]: Finished difference Result 924 states and 1719 transitions. [2020-12-22 10:03:34,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:03:34,272 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-12-22 10:03:34,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:03:34,278 INFO L225 Difference]: With dead ends: 924 [2020-12-22 10:03:34,279 INFO L226 Difference]: Without dead ends: 860 [2020-12-22 10:03:34,280 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 10:03:34,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2020-12-22 10:03:34,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 860. [2020-12-22 10:03:34,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 860 states. [2020-12-22 10:03:34,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1580 transitions. [2020-12-22 10:03:34,305 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1580 transitions. Word has length 38 [2020-12-22 10:03:34,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:03:34,306 INFO L481 AbstractCegarLoop]: Abstraction has 860 states and 1580 transitions. [2020-12-22 10:03:34,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:03:34,306 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1580 transitions. [2020-12-22 10:03:34,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 10:03:34,308 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:34,308 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 10:03:34,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:03:34,309 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:34,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:34,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1423615356, now seen corresponding path program 1 times [2020-12-22 10:03:34,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:34,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554874236] [2020-12-22 10:03:34,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:34,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:34,574 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 10:03:34,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554874236] [2020-12-22 10:03:34,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:34,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:03:34,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780222507] [2020-12-22 10:03:34,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:03:34,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:34,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:03:34,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:03:34,578 INFO L87 Difference]: Start difference. First operand 860 states and 1580 transitions. Second operand 4 states. [2020-12-22 10:03:44,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:03:44,560 INFO L93 Difference]: Finished difference Result 3115 states and 5889 transitions. [2020-12-22 10:03:44,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:03:44,561 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2020-12-22 10:03:44,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:03:44,578 INFO L225 Difference]: With dead ends: 3115 [2020-12-22 10:03:44,578 INFO L226 Difference]: Without dead ends: 2362 [2020-12-22 10:03:44,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:03:44,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2362 states. [2020-12-22 10:03:44,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2362 to 2362. [2020-12-22 10:03:44,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2362 states. [2020-12-22 10:03:44,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2362 states to 2362 states and 3694 transitions. [2020-12-22 10:03:44,698 INFO L78 Accepts]: Start accepts. Automaton has 2362 states and 3694 transitions. Word has length 63 [2020-12-22 10:03:44,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:03:44,699 INFO L481 AbstractCegarLoop]: Abstraction has 2362 states and 3694 transitions. [2020-12-22 10:03:44,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:03:44,699 INFO L276 IsEmpty]: Start isEmpty. Operand 2362 states and 3694 transitions. [2020-12-22 10:03:44,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:03:44,705 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:44,705 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:03:44,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:03:44,706 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:44,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:44,707 INFO L82 PathProgramCache]: Analyzing trace with hash -2101054792, now seen corresponding path program 1 times [2020-12-22 10:03:44,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:44,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597805445] [2020-12-22 10:03:44,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:44,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:44,865 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 10:03:44,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597805445] [2020-12-22 10:03:44,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:44,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:03:44,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536842368] [2020-12-22 10:03:44,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:03:44,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:44,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:03:44,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:03:44,868 INFO L87 Difference]: Start difference. First operand 2362 states and 3694 transitions. Second operand 3 states. [2020-12-22 10:03:44,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:03:44,915 INFO L93 Difference]: Finished difference Result 2476 states and 3874 transitions. [2020-12-22 10:03:44,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:03:44,916 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 10:03:44,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:03:44,931 INFO L225 Difference]: With dead ends: 2476 [2020-12-22 10:03:44,931 INFO L226 Difference]: Without dead ends: 2416 [2020-12-22 10:03:44,933 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 10:03:44,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2416 states. [2020-12-22 10:03:45,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2416 to 2414. [2020-12-22 10:03:45,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2414 states. [2020-12-22 10:03:45,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2414 states to 2414 states and 3777 transitions. [2020-12-22 10:03:45,011 INFO L78 Accepts]: Start accepts. Automaton has 2414 states and 3777 transitions. Word has length 77 [2020-12-22 10:03:45,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:03:45,012 INFO L481 AbstractCegarLoop]: Abstraction has 2414 states and 3777 transitions. [2020-12-22 10:03:45,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:03:45,012 INFO L276 IsEmpty]: Start isEmpty. Operand 2414 states and 3777 transitions. [2020-12-22 10:03:45,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:03:45,014 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:45,014 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:03:45,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:03:45,015 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:45,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:45,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1452480302, now seen corresponding path program 1 times [2020-12-22 10:03:45,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:45,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703128786] [2020-12-22 10:03:45,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:45,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:45,105 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 10:03:45,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703128786] [2020-12-22 10:03:45,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:45,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:03:45,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411839953] [2020-12-22 10:03:45,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:03:45,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:45,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:03:45,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:03:45,109 INFO L87 Difference]: Start difference. First operand 2414 states and 3777 transitions. Second operand 3 states. [2020-12-22 10:03:45,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:03:45,168 INFO L93 Difference]: Finished difference Result 2626 states and 4113 transitions. [2020-12-22 10:03:45,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:03:45,168 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 10:03:45,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:03:45,185 INFO L225 Difference]: With dead ends: 2626 [2020-12-22 10:03:45,186 INFO L226 Difference]: Without dead ends: 2514 [2020-12-22 10:03:45,187 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 10:03:45,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2020-12-22 10:03:45,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 2512. [2020-12-22 10:03:45,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2512 states. [2020-12-22 10:03:45,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2512 states to 2512 states and 3932 transitions. [2020-12-22 10:03:45,271 INFO L78 Accepts]: Start accepts. Automaton has 2512 states and 3932 transitions. Word has length 77 [2020-12-22 10:03:45,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:03:45,272 INFO L481 AbstractCegarLoop]: Abstraction has 2512 states and 3932 transitions. [2020-12-22 10:03:45,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:03:45,272 INFO L276 IsEmpty]: Start isEmpty. Operand 2512 states and 3932 transitions. [2020-12-22 10:03:45,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:03:45,273 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:45,273 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:03:45,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:03:45,274 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:45,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:45,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1624501596, now seen corresponding path program 1 times [2020-12-22 10:03:45,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:45,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648232755] [2020-12-22 10:03:45,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:45,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:45,393 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 10:03:45,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648232755] [2020-12-22 10:03:45,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:45,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:03:45,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222879261] [2020-12-22 10:03:45,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:03:45,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:45,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:03:45,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:03:45,396 INFO L87 Difference]: Start difference. First operand 2512 states and 3932 transitions. Second operand 8 states. [2020-12-22 10:03:45,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:03:45,813 INFO L93 Difference]: Finished difference Result 5032 states and 7928 transitions. [2020-12-22 10:03:45,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 10:03:45,814 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 77 [2020-12-22 10:03:45,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:03:45,842 INFO L225 Difference]: With dead ends: 5032 [2020-12-22 10:03:45,843 INFO L226 Difference]: Without dead ends: 4822 [2020-12-22 10:03:45,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:03:45,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4822 states. [2020-12-22 10:03:45,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4822 to 2720. [2020-12-22 10:03:45,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2720 states. [2020-12-22 10:03:45,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2720 states to 2720 states and 4256 transitions. [2020-12-22 10:03:45,966 INFO L78 Accepts]: Start accepts. Automaton has 2720 states and 4256 transitions. Word has length 77 [2020-12-22 10:03:45,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:03:45,966 INFO L481 AbstractCegarLoop]: Abstraction has 2720 states and 4256 transitions. [2020-12-22 10:03:45,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:03:45,967 INFO L276 IsEmpty]: Start isEmpty. Operand 2720 states and 4256 transitions. [2020-12-22 10:03:45,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:03:45,968 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:45,968 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:03:45,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:03:45,969 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:45,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:45,969 INFO L82 PathProgramCache]: Analyzing trace with hash 806369108, now seen corresponding path program 1 times [2020-12-22 10:03:45,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:45,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067992512] [2020-12-22 10:03:45,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:45,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:46,073 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 10:03:46,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067992512] [2020-12-22 10:03:46,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:46,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:03:46,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941614446] [2020-12-22 10:03:46,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:03:46,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:46,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:03:46,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:03:46,078 INFO L87 Difference]: Start difference. First operand 2720 states and 4256 transitions. Second operand 3 states. [2020-12-22 10:03:46,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:03:46,159 INFO L93 Difference]: Finished difference Result 3340 states and 5228 transitions. [2020-12-22 10:03:46,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:03:46,160 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:03:46,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:03:46,176 INFO L225 Difference]: With dead ends: 3340 [2020-12-22 10:03:46,176 INFO L226 Difference]: Without dead ends: 2922 [2020-12-22 10:03:46,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:03:46,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2922 states. [2020-12-22 10:03:46,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2922 to 2920. [2020-12-22 10:03:46,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2920 states. [2020-12-22 10:03:46,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2920 states to 2920 states and 4564 transitions. [2020-12-22 10:03:46,304 INFO L78 Accepts]: Start accepts. Automaton has 2920 states and 4564 transitions. Word has length 79 [2020-12-22 10:03:46,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:03:46,304 INFO L481 AbstractCegarLoop]: Abstraction has 2920 states and 4564 transitions. [2020-12-22 10:03:46,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:03:46,305 INFO L276 IsEmpty]: Start isEmpty. Operand 2920 states and 4564 transitions. [2020-12-22 10:03:46,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:03:46,306 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:46,307 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:03:46,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:03:46,307 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:46,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:46,308 INFO L82 PathProgramCache]: Analyzing trace with hash 872862620, now seen corresponding path program 1 times [2020-12-22 10:03:46,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:46,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530646449] [2020-12-22 10:03:46,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:46,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:46,602 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 10:03:46,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530646449] [2020-12-22 10:03:46,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:46,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:03:46,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774005769] [2020-12-22 10:03:46,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:03:46,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:46,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:03:46,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:03:46,607 INFO L87 Difference]: Start difference. First operand 2920 states and 4564 transitions. Second operand 8 states. [2020-12-22 10:03:47,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:03:47,025 INFO L93 Difference]: Finished difference Result 3538 states and 5528 transitions. [2020-12-22 10:03:47,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:03:47,026 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 79 [2020-12-22 10:03:47,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:03:47,042 INFO L225 Difference]: With dead ends: 3538 [2020-12-22 10:03:47,042 INFO L226 Difference]: Without dead ends: 2922 [2020-12-22 10:03:47,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2020-12-22 10:03:47,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2922 states. [2020-12-22 10:03:47,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2922 to 2920. [2020-12-22 10:03:47,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2920 states. [2020-12-22 10:03:47,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2920 states to 2920 states and 4558 transitions. [2020-12-22 10:03:47,145 INFO L78 Accepts]: Start accepts. Automaton has 2920 states and 4558 transitions. Word has length 79 [2020-12-22 10:03:47,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:03:47,145 INFO L481 AbstractCegarLoop]: Abstraction has 2920 states and 4558 transitions. [2020-12-22 10:03:47,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:03:47,146 INFO L276 IsEmpty]: Start isEmpty. Operand 2920 states and 4558 transitions. [2020-12-22 10:03:47,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:03:47,150 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:47,151 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:03:47,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:03:47,153 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:47,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:47,154 INFO L82 PathProgramCache]: Analyzing trace with hash -385682984, now seen corresponding path program 1 times [2020-12-22 10:03:47,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:47,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631606276] [2020-12-22 10:03:47,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:47,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:47,236 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 10:03:47,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631606276] [2020-12-22 10:03:47,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:47,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:03:47,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628729479] [2020-12-22 10:03:47,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:03:47,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:47,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:03:47,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:03:47,239 INFO L87 Difference]: Start difference. First operand 2920 states and 4558 transitions. Second operand 3 states. [2020-12-22 10:03:47,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:03:47,356 INFO L93 Difference]: Finished difference Result 4080 states and 6352 transitions. [2020-12-22 10:03:47,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:03:47,357 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:03:47,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:03:47,387 INFO L225 Difference]: With dead ends: 4080 [2020-12-22 10:03:47,388 INFO L226 Difference]: Without dead ends: 3464 [2020-12-22 10:03:47,392 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 10:03:47,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3464 states. [2020-12-22 10:03:47,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3464 to 3462. [2020-12-22 10:03:47,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3462 states. [2020-12-22 10:03:47,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3462 states to 3462 states and 5382 transitions. [2020-12-22 10:03:47,536 INFO L78 Accepts]: Start accepts. Automaton has 3462 states and 5382 transitions. Word has length 79 [2020-12-22 10:03:47,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:03:47,537 INFO L481 AbstractCegarLoop]: Abstraction has 3462 states and 5382 transitions. [2020-12-22 10:03:47,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:03:47,537 INFO L276 IsEmpty]: Start isEmpty. Operand 3462 states and 5382 transitions. [2020-12-22 10:03:47,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:03:47,538 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:47,538 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:03:47,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:03:47,539 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:47,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:47,539 INFO L82 PathProgramCache]: Analyzing trace with hash -111995272, now seen corresponding path program 1 times [2020-12-22 10:03:47,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:47,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311860527] [2020-12-22 10:03:47,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:47,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:47,609 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 10:03:47,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311860527] [2020-12-22 10:03:47,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:47,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:03:47,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914132304] [2020-12-22 10:03:47,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:03:47,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:47,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:03:47,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:03:47,615 INFO L87 Difference]: Start difference. First operand 3462 states and 5382 transitions. Second operand 3 states. [2020-12-22 10:03:47,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:03:47,791 INFO L93 Difference]: Finished difference Result 5634 states and 8704 transitions. [2020-12-22 10:03:47,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:03:47,799 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:03:47,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:03:47,821 INFO L225 Difference]: With dead ends: 5634 [2020-12-22 10:03:47,822 INFO L226 Difference]: Without dead ends: 4476 [2020-12-22 10:03:47,827 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 10:03:47,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4476 states. [2020-12-22 10:03:48,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4476 to 4474. [2020-12-22 10:03:48,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4474 states. [2020-12-22 10:03:48,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4474 states to 4474 states and 6898 transitions. [2020-12-22 10:03:48,050 INFO L78 Accepts]: Start accepts. Automaton has 4474 states and 6898 transitions. Word has length 79 [2020-12-22 10:03:48,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:03:48,050 INFO L481 AbstractCegarLoop]: Abstraction has 4474 states and 6898 transitions. [2020-12-22 10:03:48,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:03:48,051 INFO L276 IsEmpty]: Start isEmpty. Operand 4474 states and 6898 transitions. [2020-12-22 10:03:48,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:03:48,052 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:48,052 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:03:48,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:03:48,052 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:48,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:48,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1707076376, now seen corresponding path program 1 times [2020-12-22 10:03:48,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:48,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819149480] [2020-12-22 10:03:48,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:48,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:48,116 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 10:03:48,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819149480] [2020-12-22 10:03:48,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:48,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:03:48,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328900506] [2020-12-22 10:03:48,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:03:48,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:48,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:03:48,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:03:48,121 INFO L87 Difference]: Start difference. First operand 4474 states and 6898 transitions. Second operand 3 states. [2020-12-22 10:03:48,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:03:48,417 INFO L93 Difference]: Finished difference Result 8526 states and 13012 transitions. [2020-12-22 10:03:48,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:03:48,417 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:03:48,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:03:48,436 INFO L225 Difference]: With dead ends: 8526 [2020-12-22 10:03:48,436 INFO L226 Difference]: Without dead ends: 6356 [2020-12-22 10:03:48,443 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 10:03:48,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6356 states. [2020-12-22 10:03:48,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6356 to 6354. [2020-12-22 10:03:48,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6354 states. [2020-12-22 10:03:48,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6354 states to 6354 states and 9666 transitions. [2020-12-22 10:03:48,804 INFO L78 Accepts]: Start accepts. Automaton has 6354 states and 9666 transitions. Word has length 79 [2020-12-22 10:03:48,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:03:48,805 INFO L481 AbstractCegarLoop]: Abstraction has 6354 states and 9666 transitions. [2020-12-22 10:03:48,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:03:48,805 INFO L276 IsEmpty]: Start isEmpty. Operand 6354 states and 9666 transitions. [2020-12-22 10:03:48,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:03:48,806 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:48,806 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:03:48,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:03:48,807 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:48,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:48,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1886482360, now seen corresponding path program 1 times [2020-12-22 10:03:48,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:48,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637010665] [2020-12-22 10:03:48,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:48,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:48,868 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 10:03:48,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637010665] [2020-12-22 10:03:48,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:48,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:03:48,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052475752] [2020-12-22 10:03:48,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:03:48,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:48,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:03:48,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:03:48,871 INFO L87 Difference]: Start difference. First operand 6354 states and 9666 transitions. Second operand 3 states. [2020-12-22 10:03:49,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:03:49,413 INFO L93 Difference]: Finished difference Result 13878 states and 20836 transitions. [2020-12-22 10:03:49,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:03:49,414 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:03:49,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:03:49,441 INFO L225 Difference]: With dead ends: 13878 [2020-12-22 10:03:49,442 INFO L226 Difference]: Without dead ends: 9828 [2020-12-22 10:03:49,453 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 10:03:49,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9828 states. [2020-12-22 10:03:50,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9828 to 9826. [2020-12-22 10:03:50,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9826 states. [2020-12-22 10:03:50,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9826 states to 9826 states and 14674 transitions. [2020-12-22 10:03:50,082 INFO L78 Accepts]: Start accepts. Automaton has 9826 states and 14674 transitions. Word has length 79 [2020-12-22 10:03:50,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:03:50,083 INFO L481 AbstractCegarLoop]: Abstraction has 9826 states and 14674 transitions. [2020-12-22 10:03:50,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:03:50,083 INFO L276 IsEmpty]: Start isEmpty. Operand 9826 states and 14674 transitions. [2020-12-22 10:03:50,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 10:03:50,084 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:50,084 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:03:50,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:03:50,084 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:50,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:50,085 INFO L82 PathProgramCache]: Analyzing trace with hash 874214487, now seen corresponding path program 1 times [2020-12-22 10:03:50,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:50,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596593392] [2020-12-22 10:03:50,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:50,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:50,193 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 10:03:50,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596593392] [2020-12-22 10:03:50,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:50,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:03:50,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930618562] [2020-12-22 10:03:50,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:03:50,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:50,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:03:50,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:03:50,196 INFO L87 Difference]: Start difference. First operand 9826 states and 14674 transitions. Second operand 8 states. [2020-12-22 10:03:51,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:03:51,650 INFO L93 Difference]: Finished difference Result 16289 states and 23945 transitions. [2020-12-22 10:03:51,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:03:51,651 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 80 [2020-12-22 10:03:51,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:03:51,685 INFO L225 Difference]: With dead ends: 16289 [2020-12-22 10:03:51,686 INFO L226 Difference]: Without dead ends: 16287 [2020-12-22 10:03:51,692 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 10:03:51,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16287 states. [2020-12-22 10:03:52,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16287 to 10210. [2020-12-22 10:03:52,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10210 states. [2020-12-22 10:03:52,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10210 states to 10210 states and 15026 transitions. [2020-12-22 10:03:52,496 INFO L78 Accepts]: Start accepts. Automaton has 10210 states and 15026 transitions. Word has length 80 [2020-12-22 10:03:52,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:03:52,497 INFO L481 AbstractCegarLoop]: Abstraction has 10210 states and 15026 transitions. [2020-12-22 10:03:52,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:03:52,499 INFO L276 IsEmpty]: Start isEmpty. Operand 10210 states and 15026 transitions. [2020-12-22 10:03:52,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:03:52,505 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:52,506 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 10:03:52,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:03:52,506 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:52,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:52,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1411161737, now seen corresponding path program 1 times [2020-12-22 10:03:52,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:52,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853009039] [2020-12-22 10:03:52,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:52,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:52,673 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-22 10:03:52,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853009039] [2020-12-22 10:03:52,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:52,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:03:52,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897270747] [2020-12-22 10:03:52,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:03:52,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:52,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:03:52,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:03:52,676 INFO L87 Difference]: Start difference. First operand 10210 states and 15026 transitions. Second operand 8 states. [2020-12-22 10:03:55,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:03:55,791 INFO L93 Difference]: Finished difference Result 59216 states and 85737 transitions. [2020-12-22 10:03:55,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:03:55,791 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:03:55,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:03:55,907 INFO L225 Difference]: With dead ends: 59216 [2020-12-22 10:03:55,907 INFO L226 Difference]: Without dead ends: 51310 [2020-12-22 10:03:55,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:03:55,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51310 states. [2020-12-22 10:03:57,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51310 to 18114. [2020-12-22 10:03:57,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18114 states. [2020-12-22 10:03:57,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18114 states to 18114 states and 26354 transitions. [2020-12-22 10:03:57,576 INFO L78 Accepts]: Start accepts. Automaton has 18114 states and 26354 transitions. Word has length 112 [2020-12-22 10:03:57,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:03:57,576 INFO L481 AbstractCegarLoop]: Abstraction has 18114 states and 26354 transitions. [2020-12-22 10:03:57,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:03:57,577 INFO L276 IsEmpty]: Start isEmpty. Operand 18114 states and 26354 transitions. [2020-12-22 10:03:57,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:03:57,587 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:57,588 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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 10:03:57,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:03:57,589 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:57,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:57,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1381639519, now seen corresponding path program 1 times [2020-12-22 10:03:57,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:57,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764810459] [2020-12-22 10:03:57,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:57,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:57,776 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 10:03:57,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764810459] [2020-12-22 10:03:57,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:57,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:03:57,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565272630] [2020-12-22 10:03:57,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:03:57,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:57,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:03:57,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:03:57,779 INFO L87 Difference]: Start difference. First operand 18114 states and 26354 transitions. Second operand 8 states. [2020-12-22 10:04:00,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:00,941 INFO L93 Difference]: Finished difference Result 67120 states and 97065 transitions. [2020-12-22 10:04:00,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:04:00,941 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:04:00,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:01,085 INFO L225 Difference]: With dead ends: 67120 [2020-12-22 10:04:01,085 INFO L226 Difference]: Without dead ends: 59214 [2020-12-22 10:04:01,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:04:01,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59214 states. [2020-12-22 10:04:03,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59214 to 29986. [2020-12-22 10:04:03,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29986 states. [2020-12-22 10:04:03,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29986 states to 29986 states and 43266 transitions. [2020-12-22 10:04:03,529 INFO L78 Accepts]: Start accepts. Automaton has 29986 states and 43266 transitions. Word has length 112 [2020-12-22 10:04:03,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:03,530 INFO L481 AbstractCegarLoop]: Abstraction has 29986 states and 43266 transitions. [2020-12-22 10:04:03,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:04:03,530 INFO L276 IsEmpty]: Start isEmpty. Operand 29986 states and 43266 transitions. [2020-12-22 10:04:03,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:04:03,539 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:03,540 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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 10:04:03,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:04:03,540 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:03,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:03,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1107951807, now seen corresponding path program 1 times [2020-12-22 10:04:03,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:03,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45194518] [2020-12-22 10:04:03,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:03,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:03,705 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 10:04:03,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45194518] [2020-12-22 10:04:03,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:03,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:04:03,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756493652] [2020-12-22 10:04:03,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:04:03,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:03,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:04:03,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:04:03,713 INFO L87 Difference]: Start difference. First operand 29986 states and 43266 transitions. Second operand 8 states. [2020-12-22 10:04:07,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:07,960 INFO L93 Difference]: Finished difference Result 75024 states and 108393 transitions. [2020-12-22 10:04:07,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:04:07,960 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:04:07,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:08,048 INFO L225 Difference]: With dead ends: 75024 [2020-12-22 10:04:08,049 INFO L226 Difference]: Without dead ends: 67118 [2020-12-22 10:04:08,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:04:08,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67118 states. [2020-12-22 10:04:10,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67118 to 37890. [2020-12-22 10:04:10,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37890 states. [2020-12-22 10:04:10,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37890 states to 37890 states and 54594 transitions. [2020-12-22 10:04:10,870 INFO L78 Accepts]: Start accepts. Automaton has 37890 states and 54594 transitions. Word has length 112 [2020-12-22 10:04:10,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:10,870 INFO L481 AbstractCegarLoop]: Abstraction has 37890 states and 54594 transitions. [2020-12-22 10:04:10,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:04:10,871 INFO L276 IsEmpty]: Start isEmpty. Operand 37890 states and 54594 transitions. [2020-12-22 10:04:10,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:04:10,883 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:10,883 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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 10:04:10,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:04:10,883 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:10,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:10,884 INFO L82 PathProgramCache]: Analyzing trace with hash 711119841, now seen corresponding path program 1 times [2020-12-22 10:04:10,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:10,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594785825] [2020-12-22 10:04:10,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:10,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:11,015 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 10:04:11,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594785825] [2020-12-22 10:04:11,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:11,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:04:11,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944259534] [2020-12-22 10:04:11,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:04:11,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:11,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:04:11,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:04:11,018 INFO L87 Difference]: Start difference. First operand 37890 states and 54594 transitions. Second operand 8 states. [2020-12-22 10:04:15,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:15,826 INFO L93 Difference]: Finished difference Result 82928 states and 119721 transitions. [2020-12-22 10:04:15,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:04:15,827 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:04:15,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:15,899 INFO L225 Difference]: With dead ends: 82928 [2020-12-22 10:04:15,899 INFO L226 Difference]: Without dead ends: 75022 [2020-12-22 10:04:15,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:04:15,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75022 states. [2020-12-22 10:04:19,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75022 to 45794. [2020-12-22 10:04:19,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45794 states. [2020-12-22 10:04:19,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45794 states to 45794 states and 65922 transitions. [2020-12-22 10:04:19,480 INFO L78 Accepts]: Start accepts. Automaton has 45794 states and 65922 transitions. Word has length 112 [2020-12-22 10:04:19,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:19,480 INFO L481 AbstractCegarLoop]: Abstraction has 45794 states and 65922 transitions. [2020-12-22 10:04:19,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:04:19,481 INFO L276 IsEmpty]: Start isEmpty. Operand 45794 states and 65922 transitions. [2020-12-22 10:04:19,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:04:19,494 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:19,494 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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 10:04:19,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:04:19,495 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:19,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:19,495 INFO L82 PathProgramCache]: Analyzing trace with hash 890525825, now seen corresponding path program 1 times [2020-12-22 10:04:19,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:19,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113813887] [2020-12-22 10:04:19,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:19,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:19,735 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 10:04:19,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113813887] [2020-12-22 10:04:19,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:19,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:04:19,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254454925] [2020-12-22 10:04:19,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:04:19,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:19,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:04:19,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:04:19,742 INFO L87 Difference]: Start difference. First operand 45794 states and 65922 transitions. Second operand 8 states. [2020-12-22 10:04:25,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:25,181 INFO L93 Difference]: Finished difference Result 90832 states and 131049 transitions. [2020-12-22 10:04:25,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:04:25,182 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:04:25,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:25,255 INFO L225 Difference]: With dead ends: 90832 [2020-12-22 10:04:25,256 INFO L226 Difference]: Without dead ends: 82926 [2020-12-22 10:04:25,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:04:25,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82926 states. [2020-12-22 10:04:29,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82926 to 53698. [2020-12-22 10:04:29,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53698 states. [2020-12-22 10:04:29,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53698 states to 53698 states and 77250 transitions. [2020-12-22 10:04:29,483 INFO L78 Accepts]: Start accepts. Automaton has 53698 states and 77250 transitions. Word has length 112 [2020-12-22 10:04:29,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:29,483 INFO L481 AbstractCegarLoop]: Abstraction has 53698 states and 77250 transitions. [2020-12-22 10:04:29,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:04:29,483 INFO L276 IsEmpty]: Start isEmpty. Operand 53698 states and 77250 transitions. [2020-12-22 10:04:29,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:04:29,499 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:29,499 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 10:04:29,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:04:29,499 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:29,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:29,500 INFO L82 PathProgramCache]: Analyzing trace with hash -420877289, now seen corresponding path program 1 times [2020-12-22 10:04:29,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:29,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131733829] [2020-12-22 10:04:29,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:29,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:29,662 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:04:29,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131733829] [2020-12-22 10:04:29,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:29,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:04:29,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385352729] [2020-12-22 10:04:29,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:04:29,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:29,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:04:29,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:04:29,665 INFO L87 Difference]: Start difference. First operand 53698 states and 77250 transitions. Second operand 8 states. [2020-12-22 10:04:35,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:35,986 INFO L93 Difference]: Finished difference Result 93936 states and 135529 transitions. [2020-12-22 10:04:35,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:04:35,986 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:04:35,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:36,076 INFO L225 Difference]: With dead ends: 93936 [2020-12-22 10:04:36,076 INFO L226 Difference]: Without dead ends: 88430 [2020-12-22 10:04:36,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:04:36,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88430 states. [2020-12-22 10:04:40,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88430 to 59202. [2020-12-22 10:04:40,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59202 states. [2020-12-22 10:04:40,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59202 states to 59202 states and 85186 transitions. [2020-12-22 10:04:40,993 INFO L78 Accepts]: Start accepts. Automaton has 59202 states and 85186 transitions. Word has length 112 [2020-12-22 10:04:40,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:40,993 INFO L481 AbstractCegarLoop]: Abstraction has 59202 states and 85186 transitions. [2020-12-22 10:04:40,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:04:40,993 INFO L276 IsEmpty]: Start isEmpty. Operand 59202 states and 85186 transitions. [2020-12-22 10:04:41,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:04:41,006 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:41,006 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 10:04:41,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:04:41,007 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:41,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:41,007 INFO L82 PathProgramCache]: Analyzing trace with hash 746098925, now seen corresponding path program 1 times [2020-12-22 10:04:41,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:41,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990199078] [2020-12-22 10:04:41,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:41,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:41,082 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:04:41,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990199078] [2020-12-22 10:04:41,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:41,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:04:41,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46905927] [2020-12-22 10:04:41,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:04:41,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:41,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:04:41,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:04:41,084 INFO L87 Difference]: Start difference. First operand 59202 states and 85186 transitions. Second operand 3 states. [2020-12-22 10:04:45,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:45,510 INFO L93 Difference]: Finished difference Result 116102 states and 166772 transitions. [2020-12-22 10:04:45,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:04:45,511 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2020-12-22 10:04:45,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:45,572 INFO L225 Difference]: With dead ends: 116102 [2020-12-22 10:04:45,572 INFO L226 Difference]: Without dead ends: 59204 [2020-12-22 10:04:45,609 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 10:04:45,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59204 states. [2020-12-22 10:04:50,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59204 to 59202. [2020-12-22 10:04:50,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59202 states. [2020-12-22 10:04:50,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59202 states to 59202 states and 84498 transitions. [2020-12-22 10:04:50,534 INFO L78 Accepts]: Start accepts. Automaton has 59202 states and 84498 transitions. Word has length 113 [2020-12-22 10:04:50,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:50,534 INFO L481 AbstractCegarLoop]: Abstraction has 59202 states and 84498 transitions. [2020-12-22 10:04:50,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:04:50,534 INFO L276 IsEmpty]: Start isEmpty. Operand 59202 states and 84498 transitions. [2020-12-22 10:04:50,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:04:50,542 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:50,542 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 10:04:50,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 10:04:50,543 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:50,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:50,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1169646557, now seen corresponding path program 1 times [2020-12-22 10:04:50,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:50,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524390426] [2020-12-22 10:04:50,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:50,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:50,613 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:04:50,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524390426] [2020-12-22 10:04:50,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:50,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:04:50,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781223288] [2020-12-22 10:04:50,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:04:50,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:50,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:04:50,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:04:50,615 INFO L87 Difference]: Start difference. First operand 59202 states and 84498 transitions. Second operand 3 states. [2020-12-22 10:04:53,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:53,011 INFO L93 Difference]: Finished difference Result 87654 states and 124948 transitions. [2020-12-22 10:04:53,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:04:53,012 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2020-12-22 10:04:53,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:53,195 INFO L225 Difference]: With dead ends: 87654 [2020-12-22 10:04:53,195 INFO L226 Difference]: Without dead ends: 30756 [2020-12-22 10:04:53,220 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 10:04:53,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30756 states. [2020-12-22 10:04:55,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30756 to 30754. [2020-12-22 10:04:55,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30754 states. [2020-12-22 10:04:55,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30754 states to 30754 states and 43706 transitions. [2020-12-22 10:04:55,466 INFO L78 Accepts]: Start accepts. Automaton has 30754 states and 43706 transitions. Word has length 113 [2020-12-22 10:04:55,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:55,466 INFO L481 AbstractCegarLoop]: Abstraction has 30754 states and 43706 transitions. [2020-12-22 10:04:55,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:04:55,466 INFO L276 IsEmpty]: Start isEmpty. Operand 30754 states and 43706 transitions. [2020-12-22 10:04:55,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:04:55,471 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:55,472 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1] [2020-12-22 10:04:55,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 10:04:55,472 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:55,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:55,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1209709145, now seen corresponding path program 1 times [2020-12-22 10:04:55,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:55,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140864915] [2020-12-22 10:04:55,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:55,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:55,541 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:04:55,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140864915] [2020-12-22 10:04:55,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:55,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:04:55,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518219975] [2020-12-22 10:04:55,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:04:55,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:55,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:04:55,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:04:55,543 INFO L87 Difference]: Start difference. First operand 30754 states and 43706 transitions. Second operand 3 states. [2020-12-22 10:04:56,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:56,831 INFO L93 Difference]: Finished difference Result 44982 states and 63760 transitions. [2020-12-22 10:04:56,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:04:56,831 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2020-12-22 10:04:56,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:56,849 INFO L225 Difference]: With dead ends: 44982 [2020-12-22 10:04:56,850 INFO L226 Difference]: Without dead ends: 16532 [2020-12-22 10:04:56,862 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 10:04:56,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16532 states. [2020-12-22 10:04:58,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16532 to 16530. [2020-12-22 10:04:58,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16530 states. [2020-12-22 10:04:58,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16530 states to 16530 states and 23482 transitions. [2020-12-22 10:04:58,022 INFO L78 Accepts]: Start accepts. Automaton has 16530 states and 23482 transitions. Word has length 113 [2020-12-22 10:04:58,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:58,023 INFO L481 AbstractCegarLoop]: Abstraction has 16530 states and 23482 transitions. [2020-12-22 10:04:58,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:04:58,023 INFO L276 IsEmpty]: Start isEmpty. Operand 16530 states and 23482 transitions. [2020-12-22 10:04:58,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:04:58,025 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:58,025 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:04:58,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 10:04:58,026 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:58,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:58,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1498655857, now seen corresponding path program 1 times [2020-12-22 10:04:58,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:58,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321311071] [2020-12-22 10:04:58,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:58,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:58,090 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:04:58,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321311071] [2020-12-22 10:04:58,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:58,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:04:58,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454165994] [2020-12-22 10:04:58,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:04:58,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:58,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:04:58,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:04:58,093 INFO L87 Difference]: Start difference. First operand 16530 states and 23482 transitions. Second operand 3 states. [2020-12-22 10:04:58,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:58,714 INFO L93 Difference]: Finished difference Result 23646 states and 33424 transitions. [2020-12-22 10:04:58,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:04:58,715 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2020-12-22 10:04:58,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:58,723 INFO L225 Difference]: With dead ends: 23646 [2020-12-22 10:04:58,724 INFO L226 Difference]: Without dead ends: 9420 [2020-12-22 10:04:58,730 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 10:04:58,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9420 states. [2020-12-22 10:04:59,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9420 to 9418. [2020-12-22 10:04:59,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9418 states. [2020-12-22 10:04:59,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9418 states to 9418 states and 13456 transitions. [2020-12-22 10:04:59,250 INFO L78 Accepts]: Start accepts. Automaton has 9418 states and 13456 transitions. Word has length 113 [2020-12-22 10:04:59,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:59,250 INFO L481 AbstractCegarLoop]: Abstraction has 9418 states and 13456 transitions. [2020-12-22 10:04:59,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:04:59,250 INFO L276 IsEmpty]: Start isEmpty. Operand 9418 states and 13456 transitions. [2020-12-22 10:04:59,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:04:59,252 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:59,252 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:04:59,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 10:04:59,252 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:59,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:59,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1585774651, now seen corresponding path program 1 times [2020-12-22 10:04:59,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:59,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843828443] [2020-12-22 10:04:59,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:59,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:59,585 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:04:59,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843828443] [2020-12-22 10:04:59,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158831118] [2020-12-22 10:04:59,586 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 10:04:59,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:59,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 10:04:59,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:05:00,145 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:05:00,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:05:00,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 21 [2020-12-22 10:05:00,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699135715] [2020-12-22 10:05:00,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 10:05:00,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:05:00,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 10:05:00,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-12-22 10:05:00,149 INFO L87 Difference]: Start difference. First operand 9418 states and 13456 transitions. Second operand 21 states. [2020-12-22 10:05:09,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:05:09,760 INFO L93 Difference]: Finished difference Result 57297 states and 78761 transitions. [2020-12-22 10:05:09,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-12-22 10:05:09,761 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 113 [2020-12-22 10:05:09,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:05:09,900 INFO L225 Difference]: With dead ends: 57297 [2020-12-22 10:05:09,900 INFO L226 Difference]: Without dead ends: 50183 [2020-12-22 10:05:09,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3479 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1672, Invalid=8228, Unknown=0, NotChecked=0, Total=9900 [2020-12-22 10:05:09,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50183 states. [2020-12-22 10:05:13,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50183 to 32438. [2020-12-22 10:05:13,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32438 states. [2020-12-22 10:05:13,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32438 states to 32438 states and 44624 transitions. [2020-12-22 10:05:13,605 INFO L78 Accepts]: Start accepts. Automaton has 32438 states and 44624 transitions. Word has length 113 [2020-12-22 10:05:13,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:05:13,605 INFO L481 AbstractCegarLoop]: Abstraction has 32438 states and 44624 transitions. [2020-12-22 10:05:13,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 10:05:13,605 INFO L276 IsEmpty]: Start isEmpty. Operand 32438 states and 44624 transitions. [2020-12-22 10:05:13,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 10:05:13,610 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:05:13,610 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:05:13,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 10:05:13,824 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:05:13,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:05:13,825 INFO L82 PathProgramCache]: Analyzing trace with hash -409173495, now seen corresponding path program 1 times [2020-12-22 10:05:13,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:05:13,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662169108] [2020-12-22 10:05:13,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:05:13,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:05:14,102 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 10:05:14,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662169108] [2020-12-22 10:05:14,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611232667] [2020-12-22 10:05:14,103 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 10:05:14,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:05:14,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 10:05:14,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:05:14,463 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:05:14,757 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 10:05:14,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:05:14,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 10:05:14,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82877785] [2020-12-22 10:05:14,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 10:05:14,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:05:14,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 10:05:14,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:05:14,759 INFO L87 Difference]: Start difference. First operand 32438 states and 44624 transitions. Second operand 18 states. [2020-12-22 10:05:19,610 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 10:05:19,737 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 10:05:24,932 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 10:05:25,699 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-12-22 10:05:26,065 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 10:05:30,633 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 10:05:30,920 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 10:06:03,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:06:03,796 INFO L93 Difference]: Finished difference Result 391208 states and 528208 transitions. [2020-12-22 10:06:03,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-12-22 10:06:03,796 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 114 [2020-12-22 10:06:03,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:06:04,636 INFO L225 Difference]: With dead ends: 391208 [2020-12-22 10:06:04,636 INFO L226 Difference]: Without dead ends: 361074 [2020-12-22 10:06:04,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6383 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=2552, Invalid=14478, Unknown=0, NotChecked=0, Total=17030 [2020-12-22 10:06:05,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361074 states. [2020-12-22 10:06:21,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361074 to 138715. [2020-12-22 10:06:21,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138715 states. [2020-12-22 10:06:21,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138715 states to 138715 states and 186150 transitions. [2020-12-22 10:06:21,674 INFO L78 Accepts]: Start accepts. Automaton has 138715 states and 186150 transitions. Word has length 114 [2020-12-22 10:06:21,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:06:21,675 INFO L481 AbstractCegarLoop]: Abstraction has 138715 states and 186150 transitions. [2020-12-22 10:06:21,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 10:06:21,675 INFO L276 IsEmpty]: Start isEmpty. Operand 138715 states and 186150 transitions. [2020-12-22 10:06:21,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 10:06:21,678 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:06:21,679 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:06:21,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 10:06:21,883 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:06:21,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:06:21,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1061210015, now seen corresponding path program 1 times [2020-12-22 10:06:21,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:06:21,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743259963] [2020-12-22 10:06:21,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:06:22,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:06:22,242 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:06:22,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743259963] [2020-12-22 10:06:22,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:06:22,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:06:22,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091157268] [2020-12-22 10:06:22,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:06:22,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:06:22,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:06:22,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:06:22,245 INFO L87 Difference]: Start difference. First operand 138715 states and 186150 transitions. Second operand 3 states. [2020-12-22 10:06:28,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:06:28,330 INFO L93 Difference]: Finished difference Result 190807 states and 255285 transitions. [2020-12-22 10:06:28,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:06:28,331 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 114 [2020-12-22 10:06:28,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:06:28,412 INFO L225 Difference]: With dead ends: 190807 [2020-12-22 10:06:28,413 INFO L226 Difference]: Without dead ends: 54396 [2020-12-22 10:06:28,476 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 10:06:28,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54396 states. [2020-12-22 10:06:34,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54396 to 50920. [2020-12-22 10:06:34,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50920 states. [2020-12-22 10:06:34,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50920 states to 50920 states and 67732 transitions. [2020-12-22 10:06:34,276 INFO L78 Accepts]: Start accepts. Automaton has 50920 states and 67732 transitions. Word has length 114 [2020-12-22 10:06:34,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:06:34,276 INFO L481 AbstractCegarLoop]: Abstraction has 50920 states and 67732 transitions. [2020-12-22 10:06:34,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:06:34,277 INFO L276 IsEmpty]: Start isEmpty. Operand 50920 states and 67732 transitions. [2020-12-22 10:06:34,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 10:06:34,280 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:06:34,280 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:06:34,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 10:06:34,281 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:06:34,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:06:34,281 INFO L82 PathProgramCache]: Analyzing trace with hash 707187499, now seen corresponding path program 1 times [2020-12-22 10:06:34,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:06:34,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339707336] [2020-12-22 10:06:34,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:06:34,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:06:34,385 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 10:06:34,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339707336] [2020-12-22 10:06:34,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:06:34,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:06:34,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434003280] [2020-12-22 10:06:34,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:06:34,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:06:34,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:06:34,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:06:34,388 INFO L87 Difference]: Start difference. First operand 50920 states and 67732 transitions. Second operand 6 states. [2020-12-22 10:06:39,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:06:39,720 INFO L93 Difference]: Finished difference Result 96391 states and 127956 transitions. [2020-12-22 10:06:39,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:06:39,720 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 114 [2020-12-22 10:06:39,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:06:39,773 INFO L225 Difference]: With dead ends: 96391 [2020-12-22 10:06:39,773 INFO L226 Difference]: Without dead ends: 47892 [2020-12-22 10:06:39,795 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:06:39,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47892 states. [2020-12-22 10:06:45,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47892 to 47892. [2020-12-22 10:06:45,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47892 states. [2020-12-22 10:06:45,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47892 states to 47892 states and 63313 transitions. [2020-12-22 10:06:45,222 INFO L78 Accepts]: Start accepts. Automaton has 47892 states and 63313 transitions. Word has length 114 [2020-12-22 10:06:45,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:06:45,223 INFO L481 AbstractCegarLoop]: Abstraction has 47892 states and 63313 transitions. [2020-12-22 10:06:45,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:06:45,223 INFO L276 IsEmpty]: Start isEmpty. Operand 47892 states and 63313 transitions. [2020-12-22 10:06:45,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 10:06:45,226 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:06:45,226 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:06:45,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 10:06:45,226 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:06:45,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:06:45,227 INFO L82 PathProgramCache]: Analyzing trace with hash 125621387, now seen corresponding path program 1 times [2020-12-22 10:06:45,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:06:45,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865536776] [2020-12-22 10:06:45,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:06:45,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:06:45,319 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 10:06:45,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865536776] [2020-12-22 10:06:45,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:06:45,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:06:45,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647629545] [2020-12-22 10:06:45,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:06:45,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:06:45,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:06:45,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:06:45,321 INFO L87 Difference]: Start difference. First operand 47892 states and 63313 transitions. Second operand 6 states. [2020-12-22 10:06:49,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:06:49,898 INFO L93 Difference]: Finished difference Result 82594 states and 108806 transitions. [2020-12-22 10:06:49,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:06:49,898 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 114 [2020-12-22 10:06:49,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:06:49,938 INFO L225 Difference]: With dead ends: 82594 [2020-12-22 10:06:49,938 INFO L226 Difference]: Without dead ends: 37203 [2020-12-22 10:06:49,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:06:49,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37203 states. [2020-12-22 10:06:54,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37203 to 37203. [2020-12-22 10:06:54,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37203 states. [2020-12-22 10:06:54,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37203 states to 37203 states and 48753 transitions. [2020-12-22 10:06:54,361 INFO L78 Accepts]: Start accepts. Automaton has 37203 states and 48753 transitions. Word has length 114 [2020-12-22 10:06:54,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:06:54,361 INFO L481 AbstractCegarLoop]: Abstraction has 37203 states and 48753 transitions. [2020-12-22 10:06:54,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:06:54,361 INFO L276 IsEmpty]: Start isEmpty. Operand 37203 states and 48753 transitions. [2020-12-22 10:06:54,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 10:06:54,364 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:06:54,364 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:06:54,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-12-22 10:06:54,364 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:06:54,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:06:54,364 INFO L82 PathProgramCache]: Analyzing trace with hash -165021109, now seen corresponding path program 1 times [2020-12-22 10:06:54,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:06:54,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714904426] [2020-12-22 10:06:54,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:06:54,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:06:54,453 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 10:06:54,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714904426] [2020-12-22 10:06:54,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:06:54,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:06:54,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516334322] [2020-12-22 10:06:54,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:06:54,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:06:54,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:06:54,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:06:54,455 INFO L87 Difference]: Start difference. First operand 37203 states and 48753 transitions. Second operand 6 states.