/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:29:41,524 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:29:41,529 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:29:41,587 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:29:41,588 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:29:41,592 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:29:41,595 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:29:41,604 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:29:41,607 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:29:41,614 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:29:41,616 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:29:41,618 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:29:41,619 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:29:41,622 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:29:41,624 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:29:41,626 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:29:41,627 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:29:41,630 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:29:41,638 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:29:41,646 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:29:41,649 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:29:41,652 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:29:41,654 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:29:41,657 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:29:41,689 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:29:41,703 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:29:41,704 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:29:41,704 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:29:41,710 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:29:41,763 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:29:41,764 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:29:41,768 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:29:41,768 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:29:41,769 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:29:41,769 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:29:41,769 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:29:41,769 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:29:41,770 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:29:41,770 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:29:41,771 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:29:41,771 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:29:41,771 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:29:41,772 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:29:41,772 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:29:41,772 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:29:41,772 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:29:41,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:29:41,773 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:29:41,773 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:29:41,773 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:29:41,774 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:29:41,774 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:29:41,774 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:29:41,774 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:29:41,774 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:29:42,223 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:29:42,259 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:29:42,263 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:29:42,264 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:29:42,265 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:29:42,266 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c [2020-12-22 07:29:42,352 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd7df7c49/a659dd175aa447a88b6a55f01e99ce32/FLAG389018689 [2020-12-22 07:29:42,962 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:29:42,963 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c [2020-12-22 07:29:42,974 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd7df7c49/a659dd175aa447a88b6a55f01e99ce32/FLAG389018689 [2020-12-22 07:29:43,292 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd7df7c49/a659dd175aa447a88b6a55f01e99ce32 [2020-12-22 07:29:43,295 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:29:43,297 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:29:43,301 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:29:43,301 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:29:43,306 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:29:43,306 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:29:43" (1/1) ... [2020-12-22 07:29:43,308 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34380330 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:29:43, skipping insertion in model container [2020-12-22 07:29:43,308 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:29:43" (1/1) ... [2020-12-22 07:29:43,316 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:29:43,356 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:29:43,589 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c[12639,12652] [2020-12-22 07:29:43,599 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:29:43,621 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:29:43,714 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c[12639,12652] [2020-12-22 07:29:43,715 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:29:43,739 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:29:43,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:29:43 WrapperNode [2020-12-22 07:29:43,740 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:29:43,742 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:29:43,742 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:29:43,742 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:29:43,753 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:29:43" (1/1) ... [2020-12-22 07:29:43,767 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:29:43" (1/1) ... [2020-12-22 07:29:43,810 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:29:43,811 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:29:43,811 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:29:43,811 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:29:43,824 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:29:43" (1/1) ... [2020-12-22 07:29:43,824 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:29:43" (1/1) ... [2020-12-22 07:29:43,829 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:29:43" (1/1) ... [2020-12-22 07:29:43,829 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:29:43" (1/1) ... [2020-12-22 07:29:43,839 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:29:43" (1/1) ... [2020-12-22 07:29:43,857 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:29:43" (1/1) ... [2020-12-22 07:29:43,864 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:29:43" (1/1) ... [2020-12-22 07:29:43,871 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:29:43,875 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:29:43,875 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:29:43,875 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:29:43,876 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:29:43" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:29:44,014 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:29:44,015 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:29:44,015 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:29:44,015 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:29:44,915 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:29:44,915 INFO L299 CfgBuilder]: Removed 23 assume(true) statements. [2020-12-22 07:29:44,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:29:44 BoogieIcfgContainer [2020-12-22 07:29:44,918 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:29:44,921 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:29:44,921 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:29:44,925 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:29:44,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:29:43" (1/3) ... [2020-12-22 07:29:44,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@519eca0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:29:44, skipping insertion in model container [2020-12-22 07:29:44,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:29:43" (2/3) ... [2020-12-22 07:29:44,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@519eca0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:29:44, skipping insertion in model container [2020-12-22 07:29:44,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:29:44" (3/3) ... [2020-12-22 07:29:44,932 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c [2020-12-22 07:29:44,940 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:29:44,945 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:29:44,963 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:29:44,992 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:29:44,992 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:29:44,992 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:29:44,992 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:29:44,992 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:29:44,993 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:29:44,993 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:29:44,993 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:29:45,012 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states. [2020-12-22 07:29:45,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-22 07:29:45,022 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:29:45,022 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:29:45,023 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:29:45,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:29:45,030 INFO L82 PathProgramCache]: Analyzing trace with hash -737936725, now seen corresponding path program 1 times [2020-12-22 07:29:45,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:29:45,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037428829] [2020-12-22 07:29:45,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:29:45,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:29:45,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:29:45,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037428829] [2020-12-22 07:29:45,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:29:45,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:29:45,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227221914] [2020-12-22 07:29:45,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:29:45,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:29:45,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:29:45,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:29:45,367 INFO L87 Difference]: Start difference. First operand 119 states. Second operand 2 states. [2020-12-22 07:29:45,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:29:45,426 INFO L93 Difference]: Finished difference Result 201 states and 330 transitions. [2020-12-22 07:29:45,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:29:45,428 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 33 [2020-12-22 07:29:45,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:29:45,459 INFO L225 Difference]: With dead ends: 201 [2020-12-22 07:29:45,460 INFO L226 Difference]: Without dead ends: 115 [2020-12-22 07:29:45,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:29:45,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-12-22 07:29:45,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2020-12-22 07:29:45,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-12-22 07:29:45,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 193 transitions. [2020-12-22 07:29:45,543 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 193 transitions. Word has length 33 [2020-12-22 07:29:45,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:29:45,543 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 193 transitions. [2020-12-22 07:29:45,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:29:45,544 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 193 transitions. [2020-12-22 07:29:45,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-22 07:29:45,550 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:29:45,550 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:29:45,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:29:45,552 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:29:45,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:29:45,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1247409815, now seen corresponding path program 1 times [2020-12-22 07:29:45,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:29:45,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853525570] [2020-12-22 07:29:45,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:29:45,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:29:45,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:29:45,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853525570] [2020-12-22 07:29:45,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:29:45,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:29:45,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422076339] [2020-12-22 07:29:45,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:29:45,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:29:45,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:29:45,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:29:45,773 INFO L87 Difference]: Start difference. First operand 115 states and 193 transitions. Second operand 5 states. [2020-12-22 07:29:45,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:29:45,997 INFO L93 Difference]: Finished difference Result 196 states and 320 transitions. [2020-12-22 07:29:45,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:29:45,998 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-12-22 07:29:45,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:29:46,000 INFO L225 Difference]: With dead ends: 196 [2020-12-22 07:29:46,000 INFO L226 Difference]: Without dead ends: 115 [2020-12-22 07:29:46,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:29:46,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-12-22 07:29:46,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2020-12-22 07:29:46,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-12-22 07:29:46,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 161 transitions. [2020-12-22 07:29:46,013 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 161 transitions. Word has length 33 [2020-12-22 07:29:46,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:29:46,013 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 161 transitions. [2020-12-22 07:29:46,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:29:46,014 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 161 transitions. [2020-12-22 07:29:46,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 07:29:46,016 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:29:46,016 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] [2020-12-22 07:29:46,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:29:46,017 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:29:46,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:29:46,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1143227198, now seen corresponding path program 1 times [2020-12-22 07:29:46,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:29:46,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335336731] [2020-12-22 07:29:46,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:29:46,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:29:46,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:29:46,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335336731] [2020-12-22 07:29:46,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:29:46,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:29:46,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425864477] [2020-12-22 07:29:46,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:29:46,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:29:46,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:29:46,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:29:46,209 INFO L87 Difference]: Start difference. First operand 115 states and 161 transitions. Second operand 3 states. [2020-12-22 07:29:46,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:29:46,239 INFO L93 Difference]: Finished difference Result 257 states and 387 transitions. [2020-12-22 07:29:46,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:29:46,240 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 07:29:46,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:29:46,243 INFO L225 Difference]: With dead ends: 257 [2020-12-22 07:29:46,243 INFO L226 Difference]: Without dead ends: 180 [2020-12-22 07:29:46,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:29:46,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-12-22 07:29:46,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 178. [2020-12-22 07:29:46,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-12-22 07:29:46,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 262 transitions. [2020-12-22 07:29:46,262 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 262 transitions. Word has length 64 [2020-12-22 07:29:46,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:29:46,263 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 262 transitions. [2020-12-22 07:29:46,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:29:46,263 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 262 transitions. [2020-12-22 07:29:46,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 07:29:46,265 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:29:46,265 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:29:46,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:29:46,266 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:29:46,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:29:46,266 INFO L82 PathProgramCache]: Analyzing trace with hash -969420354, now seen corresponding path program 1 times [2020-12-22 07:29:46,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:29:46,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013270223] [2020-12-22 07:29:46,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:29:46,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:29:46,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:29:46,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013270223] [2020-12-22 07:29:46,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:29:46,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:29:46,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111657504] [2020-12-22 07:29:46,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:29:46,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:29:46,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:29:46,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:29:46,385 INFO L87 Difference]: Start difference. First operand 178 states and 262 transitions. Second operand 3 states. [2020-12-22 07:29:46,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:29:46,417 INFO L93 Difference]: Finished difference Result 434 states and 670 transitions. [2020-12-22 07:29:46,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:29:46,418 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 07:29:46,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:29:46,421 INFO L225 Difference]: With dead ends: 434 [2020-12-22 07:29:46,421 INFO L226 Difference]: Without dead ends: 294 [2020-12-22 07:29:46,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:29:46,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-12-22 07:29:46,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 292. [2020-12-22 07:29:46,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2020-12-22 07:29:46,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 443 transitions. [2020-12-22 07:29:46,449 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 443 transitions. Word has length 65 [2020-12-22 07:29:46,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:29:46,449 INFO L481 AbstractCegarLoop]: Abstraction has 292 states and 443 transitions. [2020-12-22 07:29:46,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:29:46,450 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 443 transitions. [2020-12-22 07:29:46,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 07:29:46,452 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:29:46,452 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:29:46,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:29:46,453 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:29:46,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:29:46,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1280140338, now seen corresponding path program 1 times [2020-12-22 07:29:46,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:29:46,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795581592] [2020-12-22 07:29:46,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:29:46,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:29:46,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:29:46,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795581592] [2020-12-22 07:29:46,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:29:46,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:29:46,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427165515] [2020-12-22 07:29:46,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:29:46,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:29:46,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:29:46,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:29:46,621 INFO L87 Difference]: Start difference. First operand 292 states and 443 transitions. Second operand 3 states. [2020-12-22 07:29:46,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:29:46,657 INFO L93 Difference]: Finished difference Result 752 states and 1173 transitions. [2020-12-22 07:29:46,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:29:46,658 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 07:29:46,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:29:46,662 INFO L225 Difference]: With dead ends: 752 [2020-12-22 07:29:46,662 INFO L226 Difference]: Without dead ends: 498 [2020-12-22 07:29:46,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:29:46,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2020-12-22 07:29:46,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 496. [2020-12-22 07:29:46,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 496 states. [2020-12-22 07:29:46,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 763 transitions. [2020-12-22 07:29:46,702 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 763 transitions. Word has length 66 [2020-12-22 07:29:46,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:29:46,703 INFO L481 AbstractCegarLoop]: Abstraction has 496 states and 763 transitions. [2020-12-22 07:29:46,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:29:46,703 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 763 transitions. [2020-12-22 07:29:46,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 07:29:46,705 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:29:46,706 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] [2020-12-22 07:29:46,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:29:46,706 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:29:46,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:29:46,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1226283954, now seen corresponding path program 1 times [2020-12-22 07:29:46,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:29:46,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783042939] [2020-12-22 07:29:46,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:29:46,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:29:46,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:29:46,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783042939] [2020-12-22 07:29:46,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:29:46,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:29:46,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780115710] [2020-12-22 07:29:46,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:29:46,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:29:46,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:29:46,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:29:46,840 INFO L87 Difference]: Start difference. First operand 496 states and 763 transitions. Second operand 3 states. [2020-12-22 07:29:46,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:29:46,952 INFO L93 Difference]: Finished difference Result 1316 states and 2053 transitions. [2020-12-22 07:29:46,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:29:46,953 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2020-12-22 07:29:46,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:29:46,960 INFO L225 Difference]: With dead ends: 1316 [2020-12-22 07:29:46,960 INFO L226 Difference]: Without dead ends: 858 [2020-12-22 07:29:46,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:29:46,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2020-12-22 07:29:47,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 856. [2020-12-22 07:29:47,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 856 states. [2020-12-22 07:29:47,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 1319 transitions. [2020-12-22 07:29:47,064 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 1319 transitions. Word has length 67 [2020-12-22 07:29:47,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:29:47,065 INFO L481 AbstractCegarLoop]: Abstraction has 856 states and 1319 transitions. [2020-12-22 07:29:47,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:29:47,067 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 1319 transitions. [2020-12-22 07:29:47,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 07:29:47,071 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:29:47,071 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] [2020-12-22 07:29:47,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:29:47,072 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:29:47,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:29:47,072 INFO L82 PathProgramCache]: Analyzing trace with hash 211928158, now seen corresponding path program 1 times [2020-12-22 07:29:47,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:29:47,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970740217] [2020-12-22 07:29:47,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:29:47,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:29:47,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:29:47,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970740217] [2020-12-22 07:29:47,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:29:47,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:29:47,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965488145] [2020-12-22 07:29:47,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:29:47,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:29:47,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:29:47,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:29:47,271 INFO L87 Difference]: Start difference. First operand 856 states and 1319 transitions. Second operand 7 states. [2020-12-22 07:29:47,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:29:47,628 INFO L93 Difference]: Finished difference Result 5764 states and 9005 transitions. [2020-12-22 07:29:47,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 07:29:47,629 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 68 [2020-12-22 07:29:47,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:29:47,663 INFO L225 Difference]: With dead ends: 5764 [2020-12-22 07:29:47,663 INFO L226 Difference]: Without dead ends: 4946 [2020-12-22 07:29:47,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-12-22 07:29:47,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4946 states. [2020-12-22 07:29:47,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4946 to 1672. [2020-12-22 07:29:47,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1672 states. [2020-12-22 07:29:47,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 2567 transitions. [2020-12-22 07:29:47,825 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 2567 transitions. Word has length 68 [2020-12-22 07:29:47,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:29:47,830 INFO L481 AbstractCegarLoop]: Abstraction has 1672 states and 2567 transitions. [2020-12-22 07:29:47,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:29:47,830 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 2567 transitions. [2020-12-22 07:29:47,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 07:29:47,837 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:29:47,837 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] [2020-12-22 07:29:47,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:29:47,838 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:29:47,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:29:47,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1891482376, now seen corresponding path program 1 times [2020-12-22 07:29:47,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:29:47,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112798940] [2020-12-22 07:29:47,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:29:47,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:29:48,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:29:48,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112798940] [2020-12-22 07:29:48,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:29:48,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:29:48,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949647462] [2020-12-22 07:29:48,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:29:48,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:29:48,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:29:48,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:29:48,067 INFO L87 Difference]: Start difference. First operand 1672 states and 2567 transitions. Second operand 7 states. [2020-12-22 07:29:48,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:29:48,619 INFO L93 Difference]: Finished difference Result 9010 states and 13772 transitions. [2020-12-22 07:29:48,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 07:29:48,620 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2020-12-22 07:29:48,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:29:48,660 INFO L225 Difference]: With dead ends: 9010 [2020-12-22 07:29:48,661 INFO L226 Difference]: Without dead ends: 7376 [2020-12-22 07:29:48,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:29:48,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7376 states. [2020-12-22 07:29:49,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7376 to 7368. [2020-12-22 07:29:49,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7368 states. [2020-12-22 07:29:49,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7368 states to 7368 states and 11207 transitions. [2020-12-22 07:29:49,113 INFO L78 Accepts]: Start accepts. Automaton has 7368 states and 11207 transitions. Word has length 69 [2020-12-22 07:29:49,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:29:49,115 INFO L481 AbstractCegarLoop]: Abstraction has 7368 states and 11207 transitions. [2020-12-22 07:29:49,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:29:49,115 INFO L276 IsEmpty]: Start isEmpty. Operand 7368 states and 11207 transitions. [2020-12-22 07:29:49,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 07:29:49,118 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:29:49,118 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] [2020-12-22 07:29:49,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:29:49,119 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:29:49,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:29:49,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1121612062, now seen corresponding path program 1 times [2020-12-22 07:29:49,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:29:49,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040550853] [2020-12-22 07:29:49,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:29:49,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:29:49,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:29:49,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040550853] [2020-12-22 07:29:49,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:29:49,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:29:49,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171925389] [2020-12-22 07:29:49,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:29:49,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:29:49,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:29:49,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:29:49,210 INFO L87 Difference]: Start difference. First operand 7368 states and 11207 transitions. Second operand 3 states. [2020-12-22 07:29:49,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:29:49,937 INFO L93 Difference]: Finished difference Result 20588 states and 31145 transitions. [2020-12-22 07:29:49,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:29:49,938 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 69 [2020-12-22 07:29:49,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:29:50,009 INFO L225 Difference]: With dead ends: 20588 [2020-12-22 07:29:50,010 INFO L226 Difference]: Without dead ends: 13258 [2020-12-22 07:29:50,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:29:50,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13258 states. [2020-12-22 07:29:50,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13258 to 13256. [2020-12-22 07:29:50,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13256 states. [2020-12-22 07:29:50,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13256 states to 13256 states and 19815 transitions. [2020-12-22 07:29:50,895 INFO L78 Accepts]: Start accepts. Automaton has 13256 states and 19815 transitions. Word has length 69 [2020-12-22 07:29:50,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:29:50,895 INFO L481 AbstractCegarLoop]: Abstraction has 13256 states and 19815 transitions. [2020-12-22 07:29:50,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:29:50,896 INFO L276 IsEmpty]: Start isEmpty. Operand 13256 states and 19815 transitions. [2020-12-22 07:29:50,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 07:29:50,897 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:29:50,897 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] [2020-12-22 07:29:50,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:29:50,897 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:29:50,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:29:50,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1170027667, now seen corresponding path program 1 times [2020-12-22 07:29:50,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:29:50,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930289475] [2020-12-22 07:29:50,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:29:50,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:29:51,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:29:51,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930289475] [2020-12-22 07:29:51,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:29:51,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:29:51,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65610162] [2020-12-22 07:29:51,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:29:51,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:29:51,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:29:51,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:29:51,032 INFO L87 Difference]: Start difference. First operand 13256 states and 19815 transitions. Second operand 8 states. [2020-12-22 07:29:52,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:29:52,682 INFO L93 Difference]: Finished difference Result 27754 states and 40872 transitions. [2020-12-22 07:29:52,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 07:29:52,683 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 70 [2020-12-22 07:29:52,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:29:52,760 INFO L225 Difference]: With dead ends: 27754 [2020-12-22 07:29:52,761 INFO L226 Difference]: Without dead ends: 27752 [2020-12-22 07:29:52,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 07:29:52,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27752 states. [2020-12-22 07:29:53,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27752 to 14216. [2020-12-22 07:29:53,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14216 states. [2020-12-22 07:29:53,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14216 states to 14216 states and 20775 transitions. [2020-12-22 07:29:53,911 INFO L78 Accepts]: Start accepts. Automaton has 14216 states and 20775 transitions. Word has length 70 [2020-12-22 07:29:53,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:29:53,912 INFO L481 AbstractCegarLoop]: Abstraction has 14216 states and 20775 transitions. [2020-12-22 07:29:53,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:29:53,912 INFO L276 IsEmpty]: Start isEmpty. Operand 14216 states and 20775 transitions. [2020-12-22 07:29:53,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 07:29:53,913 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:29:53,914 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] [2020-12-22 07:29:53,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:29:53,914 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:29:53,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:29:53,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1963697995, now seen corresponding path program 1 times [2020-12-22 07:29:53,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:29:53,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074290434] [2020-12-22 07:29:53,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:29:53,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:29:53,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:29:53,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074290434] [2020-12-22 07:29:53,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:29:53,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:29:53,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103020618] [2020-12-22 07:29:53,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:29:53,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:29:53,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:29:53,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:29:53,985 INFO L87 Difference]: Start difference. First operand 14216 states and 20775 transitions. Second operand 3 states. [2020-12-22 07:29:55,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:29:55,144 INFO L93 Difference]: Finished difference Result 34366 states and 50235 transitions. [2020-12-22 07:29:55,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:29:55,145 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2020-12-22 07:29:55,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:29:55,199 INFO L225 Difference]: With dead ends: 34366 [2020-12-22 07:29:55,199 INFO L226 Difference]: Without dead ends: 20188 [2020-12-22 07:29:55,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:29:55,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20188 states. [2020-12-22 07:29:56,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20188 to 20186. [2020-12-22 07:29:56,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20186 states. [2020-12-22 07:29:56,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20186 states to 20186 states and 29353 transitions. [2020-12-22 07:29:56,369 INFO L78 Accepts]: Start accepts. Automaton has 20186 states and 29353 transitions. Word has length 71 [2020-12-22 07:29:56,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:29:56,370 INFO L481 AbstractCegarLoop]: Abstraction has 20186 states and 29353 transitions. [2020-12-22 07:29:56,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:29:56,370 INFO L276 IsEmpty]: Start isEmpty. Operand 20186 states and 29353 transitions. [2020-12-22 07:29:56,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 07:29:56,383 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:29:56,383 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] [2020-12-22 07:29:56,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:29:56,384 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:29:56,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:29:56,385 INFO L82 PathProgramCache]: Analyzing trace with hash 399762008, now seen corresponding path program 1 times [2020-12-22 07:29:56,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:29:56,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051512970] [2020-12-22 07:29:56,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:29:56,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:29:56,541 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 07:29:56,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051512970] [2020-12-22 07:29:56,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348171623] [2020-12-22 07:29:56,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:29:56,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:29:56,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 07:29:56,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:29:56,972 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 07:29:56,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:29:56,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 7 [2020-12-22 07:29:56,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091039710] [2020-12-22 07:29:56,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:29:56,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:29:56,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:29:56,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:29:56,976 INFO L87 Difference]: Start difference. First operand 20186 states and 29353 transitions. Second operand 7 states. [2020-12-22 07:29:59,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:29:59,367 INFO L93 Difference]: Finished difference Result 50068 states and 73133 transitions. [2020-12-22 07:29:59,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:29:59,368 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 98 [2020-12-22 07:29:59,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:29:59,443 INFO L225 Difference]: With dead ends: 50068 [2020-12-22 07:29:59,443 INFO L226 Difference]: Without dead ends: 35890 [2020-12-22 07:29:59,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:29:59,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35890 states. [2020-12-22 07:30:01,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35890 to 33498. [2020-12-22 07:30:01,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33498 states. [2020-12-22 07:30:01,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33498 states to 33498 states and 48521 transitions. [2020-12-22 07:30:01,576 INFO L78 Accepts]: Start accepts. Automaton has 33498 states and 48521 transitions. Word has length 98 [2020-12-22 07:30:01,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:30:01,576 INFO L481 AbstractCegarLoop]: Abstraction has 33498 states and 48521 transitions. [2020-12-22 07:30:01,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:30:01,577 INFO L276 IsEmpty]: Start isEmpty. Operand 33498 states and 48521 transitions. [2020-12-22 07:30:01,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-22 07:30:01,598 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:30:01,600 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:30:01,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 07:30:01,815 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:30:01,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:30:01,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1801045658, now seen corresponding path program 1 times [2020-12-22 07:30:01,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:30:01,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127220465] [2020-12-22 07:30:01,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:30:01,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:30:01,944 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 07:30:01,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127220465] [2020-12-22 07:30:01,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:30:01,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:30:01,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37853215] [2020-12-22 07:30:01,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:30:01,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:30:01,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:30:01,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:30:01,953 INFO L87 Difference]: Start difference. First operand 33498 states and 48521 transitions. Second operand 7 states. [2020-12-22 07:30:04,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:30:04,953 INFO L93 Difference]: Finished difference Result 80310 states and 117295 transitions. [2020-12-22 07:30:04,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 07:30:04,953 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 99 [2020-12-22 07:30:04,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:30:05,104 INFO L225 Difference]: With dead ends: 80310 [2020-12-22 07:30:05,104 INFO L226 Difference]: Without dead ends: 66132 [2020-12-22 07:30:05,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 07:30:05,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66132 states. [2020-12-22 07:30:07,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66132 to 46386. [2020-12-22 07:30:07,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46386 states. [2020-12-22 07:30:08,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46386 states to 46386 states and 67177 transitions. [2020-12-22 07:30:08,000 INFO L78 Accepts]: Start accepts. Automaton has 46386 states and 67177 transitions. Word has length 99 [2020-12-22 07:30:08,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:30:08,000 INFO L481 AbstractCegarLoop]: Abstraction has 46386 states and 67177 transitions. [2020-12-22 07:30:08,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:30:08,001 INFO L276 IsEmpty]: Start isEmpty. Operand 46386 states and 67177 transitions. [2020-12-22 07:30:08,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-22 07:30:08,015 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:30:08,015 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:30:08,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:30:08,016 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:30:08,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:30:08,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1823116810, now seen corresponding path program 1 times [2020-12-22 07:30:08,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:30:08,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575383129] [2020-12-22 07:30:08,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:30:08,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:30:08,079 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:30:08,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575383129] [2020-12-22 07:30:08,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:30:08,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:30:08,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560260936] [2020-12-22 07:30:08,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:30:08,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:30:08,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:30:08,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:30:08,081 INFO L87 Difference]: Start difference. First operand 46386 states and 67177 transitions. Second operand 3 states. [2020-12-22 07:30:10,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:30:10,994 INFO L93 Difference]: Finished difference Result 103262 states and 149604 transitions. [2020-12-22 07:30:10,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:30:10,995 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 99 [2020-12-22 07:30:10,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:30:11,117 INFO L225 Difference]: With dead ends: 103262 [2020-12-22 07:30:11,118 INFO L226 Difference]: Without dead ends: 71508 [2020-12-22 07:30:11,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:30:11,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71508 states. [2020-12-22 07:30:14,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71508 to 67666. [2020-12-22 07:30:14,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67666 states. [2020-12-22 07:30:14,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67666 states to 67666 states and 97050 transitions. [2020-12-22 07:30:14,763 INFO L78 Accepts]: Start accepts. Automaton has 67666 states and 97050 transitions. Word has length 99 [2020-12-22 07:30:14,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:30:14,763 INFO L481 AbstractCegarLoop]: Abstraction has 67666 states and 97050 transitions. [2020-12-22 07:30:14,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:30:14,764 INFO L276 IsEmpty]: Start isEmpty. Operand 67666 states and 97050 transitions. [2020-12-22 07:30:14,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-22 07:30:14,784 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:30:14,784 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:30:14,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:30:14,784 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:30:14,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:30:14,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1418738454, now seen corresponding path program 1 times [2020-12-22 07:30:14,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:30:14,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594928348] [2020-12-22 07:30:14,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:30:14,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:30:14,844 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:30:14,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594928348] [2020-12-22 07:30:14,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:30:14,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:30:14,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182042463] [2020-12-22 07:30:14,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:30:14,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:30:14,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:30:14,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:30:14,846 INFO L87 Difference]: Start difference. First operand 67666 states and 97050 transitions. Second operand 3 states. [2020-12-22 07:30:18,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:30:18,143 INFO L93 Difference]: Finished difference Result 100629 states and 144018 transitions. [2020-12-22 07:30:18,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:30:18,143 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 99 [2020-12-22 07:30:18,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:30:18,220 INFO L225 Difference]: With dead ends: 100629 [2020-12-22 07:30:18,220 INFO L226 Difference]: Without dead ends: 69583 [2020-12-22 07:30:18,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:30:18,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69583 states. [2020-12-22 07:30:21,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69583 to 67771. [2020-12-22 07:30:21,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67771 states. [2020-12-22 07:30:21,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67771 states to 67771 states and 95765 transitions. [2020-12-22 07:30:21,706 INFO L78 Accepts]: Start accepts. Automaton has 67771 states and 95765 transitions. Word has length 99 [2020-12-22 07:30:21,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:30:21,707 INFO L481 AbstractCegarLoop]: Abstraction has 67771 states and 95765 transitions. [2020-12-22 07:30:21,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:30:21,707 INFO L276 IsEmpty]: Start isEmpty. Operand 67771 states and 95765 transitions. [2020-12-22 07:30:21,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-22 07:30:21,724 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:30:21,724 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:30:21,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:30:21,725 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:30:21,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:30:21,725 INFO L82 PathProgramCache]: Analyzing trace with hash 991392390, now seen corresponding path program 1 times [2020-12-22 07:30:21,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:30:21,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854188222] [2020-12-22 07:30:21,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:30:21,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:30:21,785 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:30:21,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854188222] [2020-12-22 07:30:21,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:30:21,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:30:21,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059977394] [2020-12-22 07:30:21,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:30:21,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:30:21,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:30:21,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:30:21,787 INFO L87 Difference]: Start difference. First operand 67771 states and 95765 transitions. Second operand 3 states. [2020-12-22 07:30:25,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:30:25,869 INFO L93 Difference]: Finished difference Result 136489 states and 192632 transitions. [2020-12-22 07:30:25,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:30:25,870 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 99 [2020-12-22 07:30:25,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:30:26,001 INFO L225 Difference]: With dead ends: 136489 [2020-12-22 07:30:26,001 INFO L226 Difference]: Without dead ends: 92101 [2020-12-22 07:30:26,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:30:26,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92101 states. [2020-12-22 07:30:30,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92101 to 90229. [2020-12-22 07:30:30,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90229 states. [2020-12-22 07:30:30,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90229 states to 90229 states and 125726 transitions. [2020-12-22 07:30:30,878 INFO L78 Accepts]: Start accepts. Automaton has 90229 states and 125726 transitions. Word has length 99 [2020-12-22 07:30:30,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:30:30,878 INFO L481 AbstractCegarLoop]: Abstraction has 90229 states and 125726 transitions. [2020-12-22 07:30:30,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:30:30,879 INFO L276 IsEmpty]: Start isEmpty. Operand 90229 states and 125726 transitions. [2020-12-22 07:30:30,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-22 07:30:30,897 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:30:30,897 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:30:30,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:30:30,898 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:30:30,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:30:30,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1121040196, now seen corresponding path program 1 times [2020-12-22 07:30:30,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:30:30,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40648308] [2020-12-22 07:30:30,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:30:30,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:30:30,957 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:30:30,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40648308] [2020-12-22 07:30:30,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:30:30,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:30:30,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895531915] [2020-12-22 07:30:30,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:30:30,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:30:30,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:30:30,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:30:30,959 INFO L87 Difference]: Start difference. First operand 90229 states and 125726 transitions. Second operand 3 states. [2020-12-22 07:30:38,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:30:38,862 INFO L93 Difference]: Finished difference Result 254386 states and 353882 transitions. [2020-12-22 07:30:38,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:30:38,862 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 99 [2020-12-22 07:30:38,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:30:39,092 INFO L225 Difference]: With dead ends: 254386 [2020-12-22 07:30:39,092 INFO L226 Difference]: Without dead ends: 169682 [2020-12-22 07:30:39,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:30:39,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169682 states. [2020-12-22 07:30:46,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169682 to 169468. [2020-12-22 07:30:46,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169468 states. [2020-12-22 07:30:47,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169468 states to 169468 states and 233363 transitions. [2020-12-22 07:30:47,424 INFO L78 Accepts]: Start accepts. Automaton has 169468 states and 233363 transitions. Word has length 99 [2020-12-22 07:30:47,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:30:47,424 INFO L481 AbstractCegarLoop]: Abstraction has 169468 states and 233363 transitions. [2020-12-22 07:30:47,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:30:47,424 INFO L276 IsEmpty]: Start isEmpty. Operand 169468 states and 233363 transitions. [2020-12-22 07:30:47,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-22 07:30:47,449 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:30:47,449 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:30:47,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:30:47,450 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:30:47,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:30:47,450 INFO L82 PathProgramCache]: Analyzing trace with hash -173536388, now seen corresponding path program 1 times [2020-12-22 07:30:47,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:30:47,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077244634] [2020-12-22 07:30:47,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:30:47,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:30:47,551 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 07:30:47,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077244634] [2020-12-22 07:30:47,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:30:47,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:30:47,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511511023] [2020-12-22 07:30:47,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:30:47,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:30:47,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:30:47,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:30:47,554 INFO L87 Difference]: Start difference. First operand 169468 states and 233363 transitions. Second operand 7 states. [2020-12-22 07:31:00,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:31:00,834 INFO L93 Difference]: Finished difference Result 348957 states and 485709 transitions. [2020-12-22 07:31:00,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 07:31:00,834 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 99 [2020-12-22 07:31:00,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:31:01,345 INFO L225 Difference]: With dead ends: 348957 [2020-12-22 07:31:01,346 INFO L226 Difference]: Without dead ends: 321563 [2020-12-22 07:31:01,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 07:31:01,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321563 states. [2020-12-22 07:31:11,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321563 to 195708. [2020-12-22 07:31:11,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195708 states. [2020-12-22 07:31:12,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195708 states to 195708 states and 269779 transitions. [2020-12-22 07:31:12,043 INFO L78 Accepts]: Start accepts. Automaton has 195708 states and 269779 transitions. Word has length 99 [2020-12-22 07:31:12,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:31:12,043 INFO L481 AbstractCegarLoop]: Abstraction has 195708 states and 269779 transitions. [2020-12-22 07:31:12,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:31:12,043 INFO L276 IsEmpty]: Start isEmpty. Operand 195708 states and 269779 transitions. [2020-12-22 07:31:12,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-22 07:31:12,069 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:31:12,070 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:31:12,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:31:12,070 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:31:12,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:31:12,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1655579334, now seen corresponding path program 1 times [2020-12-22 07:31:12,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:31:12,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110952282] [2020-12-22 07:31:12,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:31:12,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:31:12,192 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 07:31:12,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110952282] [2020-12-22 07:31:12,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:31:12,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:31:12,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949328060] [2020-12-22 07:31:12,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:31:12,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:31:12,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:31:12,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:31:12,196 INFO L87 Difference]: Start difference. First operand 195708 states and 269779 transitions. Second operand 7 states.