/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_floodmax.3.2.ufo.BOUNDED-6.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:17:38,484 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:17:38,488 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:17:38,542 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:17:38,543 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:17:38,546 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:17:38,550 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:17:38,559 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:17:38,563 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:17:38,568 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:17:38,570 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:17:38,571 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:17:38,571 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:17:38,575 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:17:38,577 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:17:38,579 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:17:38,580 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:17:38,596 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:17:38,603 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:17:38,611 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:17:38,613 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:17:38,615 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:17:38,617 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:17:38,620 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:17:38,628 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:17:38,639 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:17:38,640 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:17:38,641 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:17:38,646 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:17:38,696 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:17:38,696 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:17:38,700 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:17:38,700 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:17:38,701 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:17:38,701 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:17:38,701 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:17:38,701 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:17:38,701 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:17:38,702 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:17:38,703 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:17:38,703 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:17:38,703 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:17:38,703 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:17:38,704 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:17:38,704 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:17:38,704 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:17:38,704 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:17:38,704 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:17:38,705 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:17:38,705 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:17:38,705 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:17:38,705 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:17:38,706 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:17:38,706 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:17:38,706 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:17:39,121 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:17:39,149 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:17:39,152 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:17:39,153 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:17:39,154 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:17:39,155 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.2.ufo.BOUNDED-6.pals.c [2020-12-22 07:17:39,241 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0cbfdbafe/6e67449dec5a41a99d97ab8bc8c8ee28/FLAG99d222878 [2020-12-22 07:17:39,803 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:17:39,804 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.2.ufo.BOUNDED-6.pals.c [2020-12-22 07:17:39,815 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0cbfdbafe/6e67449dec5a41a99d97ab8bc8c8ee28/FLAG99d222878 [2020-12-22 07:17:40,145 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0cbfdbafe/6e67449dec5a41a99d97ab8bc8c8ee28 [2020-12-22 07:17:40,149 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:17:40,151 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:17:40,157 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:17:40,157 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:17:40,161 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:17:40,162 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:17:40" (1/1) ... [2020-12-22 07:17:40,164 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2df057c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:17:40, skipping insertion in model container [2020-12-22 07:17:40,164 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:17:40" (1/1) ... [2020-12-22 07:17:40,172 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:17:40,237 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:17:40,465 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_floodmax.3.2.ufo.BOUNDED-6.pals.c[12764,12777] [2020-12-22 07:17:40,471 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:17:40,491 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:17:40,620 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_floodmax.3.2.ufo.BOUNDED-6.pals.c[12764,12777] [2020-12-22 07:17:40,623 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:17:40,660 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:17:40,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:17:40 WrapperNode [2020-12-22 07:17:40,661 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:17:40,663 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:17:40,663 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:17:40,663 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:17:40,676 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:17:40" (1/1) ... [2020-12-22 07:17:40,689 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:17:40" (1/1) ... [2020-12-22 07:17:40,733 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:17:40,734 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:17:40,734 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:17:40,734 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:17:40,744 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:17:40" (1/1) ... [2020-12-22 07:17:40,744 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:17:40" (1/1) ... [2020-12-22 07:17:40,748 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:17:40" (1/1) ... [2020-12-22 07:17:40,748 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:17:40" (1/1) ... [2020-12-22 07:17:40,761 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:17:40" (1/1) ... [2020-12-22 07:17:40,779 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:17:40" (1/1) ... [2020-12-22 07:17:40,785 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:17:40" (1/1) ... [2020-12-22 07:17:40,796 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:17:40,797 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:17:40,797 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:17:40,797 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:17:40,798 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:17:40" (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 07:17:40,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:17:40,919 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:17:40,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:17:40,919 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:17:41,835 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:17:41,836 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2020-12-22 07:17:41,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:17:41 BoogieIcfgContainer [2020-12-22 07:17:41,840 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:17:41,843 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:17:41,844 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:17:41,847 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:17:41,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:17:40" (1/3) ... [2020-12-22 07:17:41,852 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b37c241 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:17:41, skipping insertion in model container [2020-12-22 07:17:41,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:17:40" (2/3) ... [2020-12-22 07:17:41,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b37c241 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:17:41, skipping insertion in model container [2020-12-22 07:17:41,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:17:41" (3/3) ... [2020-12-22 07:17:41,855 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.2.ufo.BOUNDED-6.pals.c [2020-12-22 07:17:41,867 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:17:41,872 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:17:41,889 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:17:41,917 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:17:41,918 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:17:41,918 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:17:41,918 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:17:41,918 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:17:41,918 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:17:41,919 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:17:41,919 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:17:41,937 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states. [2020-12-22 07:17:41,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 07:17:41,947 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:17:41,948 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] [2020-12-22 07:17:41,948 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:17:41,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:17:41,955 INFO L82 PathProgramCache]: Analyzing trace with hash -306716250, now seen corresponding path program 1 times [2020-12-22 07:17:41,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:17:41,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710890020] [2020-12-22 07:17:41,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:17:42,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:17:42,234 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 07:17:42,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710890020] [2020-12-22 07:17:42,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:17:42,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:17:42,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799697519] [2020-12-22 07:17:42,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:17:42,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:17:42,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:17:42,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:17:42,265 INFO L87 Difference]: Start difference. First operand 131 states. Second operand 2 states. [2020-12-22 07:17:42,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:17:42,306 INFO L93 Difference]: Finished difference Result 206 states and 352 transitions. [2020-12-22 07:17:42,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:17:42,307 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 37 [2020-12-22 07:17:42,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:17:42,319 INFO L225 Difference]: With dead ends: 206 [2020-12-22 07:17:42,319 INFO L226 Difference]: Without dead ends: 127 [2020-12-22 07:17:42,323 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 07:17:42,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-12-22 07:17:42,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2020-12-22 07:17:42,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-12-22 07:17:42,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 220 transitions. [2020-12-22 07:17:42,367 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 220 transitions. Word has length 37 [2020-12-22 07:17:42,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:17:42,368 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 220 transitions. [2020-12-22 07:17:42,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:17:42,368 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 220 transitions. [2020-12-22 07:17:42,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 07:17:42,371 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:17:42,371 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] [2020-12-22 07:17:42,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:17:42,371 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:17:42,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:17:42,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1124364700, now seen corresponding path program 1 times [2020-12-22 07:17:42,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:17:42,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138477310] [2020-12-22 07:17:42,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:17:42,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:17:42,533 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 07:17:42,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138477310] [2020-12-22 07:17:42,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:17:42,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:17:42,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270951588] [2020-12-22 07:17:42,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:17:42,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:17:42,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:17:42,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:17:42,538 INFO L87 Difference]: Start difference. First operand 127 states and 220 transitions. Second operand 5 states. [2020-12-22 07:17:42,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:17:42,687 INFO L93 Difference]: Finished difference Result 271 states and 460 transitions. [2020-12-22 07:17:42,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:17:42,688 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-12-22 07:17:42,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:17:42,691 INFO L225 Difference]: With dead ends: 271 [2020-12-22 07:17:42,691 INFO L226 Difference]: Without dead ends: 197 [2020-12-22 07:17:42,693 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 07:17:42,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-12-22 07:17:42,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 127. [2020-12-22 07:17:42,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-12-22 07:17:42,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 193 transitions. [2020-12-22 07:17:42,709 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 193 transitions. Word has length 37 [2020-12-22 07:17:42,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:17:42,710 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 193 transitions. [2020-12-22 07:17:42,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:17:42,710 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 193 transitions. [2020-12-22 07:17:42,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 07:17:42,713 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:17:42,713 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:17:42,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:17:42,713 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:17:42,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:17:42,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1313145683, now seen corresponding path program 1 times [2020-12-22 07:17:42,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:17:42,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884581007] [2020-12-22 07:17:42,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:17:42,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:17:42,878 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 07:17:42,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884581007] [2020-12-22 07:17:42,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:17:42,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:17:42,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33049070] [2020-12-22 07:17:42,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:17:42,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:17:42,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:17:42,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:17:42,882 INFO L87 Difference]: Start difference. First operand 127 states and 193 transitions. Second operand 3 states. [2020-12-22 07:17:42,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:17:42,937 INFO L93 Difference]: Finished difference Result 258 states and 412 transitions. [2020-12-22 07:17:42,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:17:42,938 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 07:17:42,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:17:42,941 INFO L225 Difference]: With dead ends: 258 [2020-12-22 07:17:42,941 INFO L226 Difference]: Without dead ends: 188 [2020-12-22 07:17:42,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 07:17:42,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-12-22 07:17:42,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 186. [2020-12-22 07:17:42,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-12-22 07:17:42,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 288 transitions. [2020-12-22 07:17:42,963 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 288 transitions. Word has length 63 [2020-12-22 07:17:42,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:17:42,964 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 288 transitions. [2020-12-22 07:17:42,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:17:42,964 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 288 transitions. [2020-12-22 07:17:42,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 07:17:42,967 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:17:42,968 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:17:42,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:17:42,968 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:17:42,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:17:42,969 INFO L82 PathProgramCache]: Analyzing trace with hash -255493166, now seen corresponding path program 1 times [2020-12-22 07:17:42,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:17:42,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797793355] [2020-12-22 07:17:42,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:17:43,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:17:43,071 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 07:17:43,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797793355] [2020-12-22 07:17:43,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:17:43,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:17:43,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444059836] [2020-12-22 07:17:43,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:17:43,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:17:43,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:17:43,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:17:43,079 INFO L87 Difference]: Start difference. First operand 186 states and 288 transitions. Second operand 3 states. [2020-12-22 07:17:43,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:17:43,116 INFO L93 Difference]: Finished difference Result 313 states and 501 transitions. [2020-12-22 07:17:43,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:17:43,117 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 07:17:43,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:17:43,122 INFO L225 Difference]: With dead ends: 313 [2020-12-22 07:17:43,122 INFO L226 Difference]: Without dead ends: 243 [2020-12-22 07:17:43,125 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 07:17:43,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-12-22 07:17:43,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 241. [2020-12-22 07:17:43,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-12-22 07:17:43,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 380 transitions. [2020-12-22 07:17:43,170 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 380 transitions. Word has length 65 [2020-12-22 07:17:43,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:17:43,171 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 380 transitions. [2020-12-22 07:17:43,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:17:43,171 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 380 transitions. [2020-12-22 07:17:43,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 07:17:43,174 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:17:43,175 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 07:17:43,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:17:43,176 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:17:43,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:17:43,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1395779292, now seen corresponding path program 1 times [2020-12-22 07:17:43,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:17:43,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373510523] [2020-12-22 07:17:43,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:17:43,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:17:43,278 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 07:17:43,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373510523] [2020-12-22 07:17:43,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:17:43,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:17:43,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56969477] [2020-12-22 07:17:43,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:17:43,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:17:43,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:17:43,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:17:43,281 INFO L87 Difference]: Start difference. First operand 241 states and 380 transitions. Second operand 3 states. [2020-12-22 07:17:43,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:17:43,328 INFO L93 Difference]: Finished difference Result 584 states and 947 transitions. [2020-12-22 07:17:43,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:17:43,329 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 07:17:43,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:17:43,332 INFO L225 Difference]: With dead ends: 584 [2020-12-22 07:17:43,332 INFO L226 Difference]: Without dead ends: 402 [2020-12-22 07:17:43,334 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 07:17:43,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2020-12-22 07:17:43,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 400. [2020-12-22 07:17:43,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2020-12-22 07:17:43,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 640 transitions. [2020-12-22 07:17:43,371 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 640 transitions. Word has length 65 [2020-12-22 07:17:43,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:17:43,373 INFO L481 AbstractCegarLoop]: Abstraction has 400 states and 640 transitions. [2020-12-22 07:17:43,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:17:43,373 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 640 transitions. [2020-12-22 07:17:43,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 07:17:43,380 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:17:43,380 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 07:17:43,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:17:43,380 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:17:43,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:17:43,381 INFO L82 PathProgramCache]: Analyzing trace with hash -812427391, now seen corresponding path program 1 times [2020-12-22 07:17:43,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:17:43,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197954265] [2020-12-22 07:17:43,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:17:43,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:17:43,482 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 07:17:43,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197954265] [2020-12-22 07:17:43,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:17:43,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:17:43,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724411035] [2020-12-22 07:17:43,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:17:43,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:17:43,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:17:43,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:17:43,485 INFO L87 Difference]: Start difference. First operand 400 states and 640 transitions. Second operand 3 states. [2020-12-22 07:17:43,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:17:43,520 INFO L93 Difference]: Finished difference Result 729 states and 1183 transitions. [2020-12-22 07:17:43,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:17:43,521 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2020-12-22 07:17:43,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:17:43,524 INFO L225 Difference]: With dead ends: 729 [2020-12-22 07:17:43,525 INFO L226 Difference]: Without dead ends: 547 [2020-12-22 07:17:43,525 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 07:17:43,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2020-12-22 07:17:43,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 545. [2020-12-22 07:17:43,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 545 states. [2020-12-22 07:17:43,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 875 transitions. [2020-12-22 07:17:43,546 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 875 transitions. Word has length 67 [2020-12-22 07:17:43,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:17:43,547 INFO L481 AbstractCegarLoop]: Abstraction has 545 states and 875 transitions. [2020-12-22 07:17:43,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:17:43,547 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 875 transitions. [2020-12-22 07:17:43,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 07:17:43,548 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:17:43,548 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 07:17:43,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:17:43,549 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:17:43,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:17:43,549 INFO L82 PathProgramCache]: Analyzing trace with hash 221435787, now seen corresponding path program 1 times [2020-12-22 07:17:43,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:17:43,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469699468] [2020-12-22 07:17:43,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:17:43,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:17:43,636 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 07:17:43,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469699468] [2020-12-22 07:17:43,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:17:43,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:17:43,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047666497] [2020-12-22 07:17:43,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:17:43,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:17:43,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:17:43,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:17:43,639 INFO L87 Difference]: Start difference. First operand 545 states and 875 transitions. Second operand 3 states. [2020-12-22 07:17:43,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:17:43,679 INFO L93 Difference]: Finished difference Result 1434 states and 2326 transitions. [2020-12-22 07:17:43,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:17:43,680 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2020-12-22 07:17:43,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:17:43,685 INFO L225 Difference]: With dead ends: 1434 [2020-12-22 07:17:43,685 INFO L226 Difference]: Without dead ends: 958 [2020-12-22 07:17:43,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 07:17:43,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2020-12-22 07:17:43,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 956. [2020-12-22 07:17:43,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 956 states. [2020-12-22 07:17:43,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 1532 transitions. [2020-12-22 07:17:43,722 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 1532 transitions. Word has length 67 [2020-12-22 07:17:43,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:17:43,722 INFO L481 AbstractCegarLoop]: Abstraction has 956 states and 1532 transitions. [2020-12-22 07:17:43,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:17:43,722 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 1532 transitions. [2020-12-22 07:17:43,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 07:17:43,723 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:17:43,723 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 07:17:43,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:17:43,724 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:17:43,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:17:43,724 INFO L82 PathProgramCache]: Analyzing trace with hash 664156592, now seen corresponding path program 1 times [2020-12-22 07:17:43,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:17:43,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405353541] [2020-12-22 07:17:43,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:17:43,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:17:43,779 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 07:17:43,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405353541] [2020-12-22 07:17:43,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:17:43,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:17:43,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468376791] [2020-12-22 07:17:43,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:17:43,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:17:43,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:17:43,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:17:43,781 INFO L87 Difference]: Start difference. First operand 956 states and 1532 transitions. Second operand 3 states. [2020-12-22 07:17:43,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:17:43,825 INFO L93 Difference]: Finished difference Result 1783 states and 2881 transitions. [2020-12-22 07:17:43,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:17:43,826 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 69 [2020-12-22 07:17:43,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:17:43,833 INFO L225 Difference]: With dead ends: 1783 [2020-12-22 07:17:43,833 INFO L226 Difference]: Without dead ends: 1307 [2020-12-22 07:17:43,834 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 07:17:43,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2020-12-22 07:17:43,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 1305. [2020-12-22 07:17:43,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1305 states. [2020-12-22 07:17:43,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1305 states to 1305 states and 2086 transitions. [2020-12-22 07:17:43,880 INFO L78 Accepts]: Start accepts. Automaton has 1305 states and 2086 transitions. Word has length 69 [2020-12-22 07:17:43,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:17:43,880 INFO L481 AbstractCegarLoop]: Abstraction has 1305 states and 2086 transitions. [2020-12-22 07:17:43,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:17:43,881 INFO L276 IsEmpty]: Start isEmpty. Operand 1305 states and 2086 transitions. [2020-12-22 07:17:43,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 07:17:43,881 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:17:43,882 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 07:17:43,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:17:43,882 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:17:43,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:17:43,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1757720902, now seen corresponding path program 1 times [2020-12-22 07:17:43,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:17:43,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056693163] [2020-12-22 07:17:43,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:17:43,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:17:43,982 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 07:17:43,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056693163] [2020-12-22 07:17:43,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:17:43,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:17:43,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759124366] [2020-12-22 07:17:43,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:17:43,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:17:43,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:17:43,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:17:43,985 INFO L87 Difference]: Start difference. First operand 1305 states and 2086 transitions. Second operand 5 states. [2020-12-22 07:17:44,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:17:44,293 INFO L93 Difference]: Finished difference Result 6582 states and 10723 transitions. [2020-12-22 07:17:44,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 07:17:44,294 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2020-12-22 07:17:44,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:17:44,322 INFO L225 Difference]: With dead ends: 6582 [2020-12-22 07:17:44,322 INFO L226 Difference]: Without dead ends: 5356 [2020-12-22 07:17:44,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:17:44,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5356 states. [2020-12-22 07:17:44,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5356 to 2452. [2020-12-22 07:17:44,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2452 states. [2020-12-22 07:17:44,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2452 states to 2452 states and 3914 transitions. [2020-12-22 07:17:44,461 INFO L78 Accepts]: Start accepts. Automaton has 2452 states and 3914 transitions. Word has length 69 [2020-12-22 07:17:44,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:17:44,461 INFO L481 AbstractCegarLoop]: Abstraction has 2452 states and 3914 transitions. [2020-12-22 07:17:44,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:17:44,461 INFO L276 IsEmpty]: Start isEmpty. Operand 2452 states and 3914 transitions. [2020-12-22 07:17:44,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 07:17:44,468 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:17:44,468 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:17:44,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:17:44,469 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:17:44,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:17:44,469 INFO L82 PathProgramCache]: Analyzing trace with hash -577605759, now seen corresponding path program 1 times [2020-12-22 07:17:44,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:17:44,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369227842] [2020-12-22 07:17:44,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:17:44,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:17:44,539 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 07:17:44,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369227842] [2020-12-22 07:17:44,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:17:44,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:17:44,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521887347] [2020-12-22 07:17:44,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:17:44,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:17:44,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:17:44,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:17:44,542 INFO L87 Difference]: Start difference. First operand 2452 states and 3914 transitions. Second operand 4 states. [2020-12-22 07:17:44,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:17:44,835 INFO L93 Difference]: Finished difference Result 7943 states and 12835 transitions. [2020-12-22 07:17:44,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:17:44,837 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-12-22 07:17:44,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:17:44,866 INFO L225 Difference]: With dead ends: 7943 [2020-12-22 07:17:44,867 INFO L226 Difference]: Without dead ends: 5570 [2020-12-22 07:17:44,874 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:17:44,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5570 states. [2020-12-22 07:17:45,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5570 to 3992. [2020-12-22 07:17:45,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3992 states. [2020-12-22 07:17:45,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3992 states to 3992 states and 6384 transitions. [2020-12-22 07:17:45,086 INFO L78 Accepts]: Start accepts. Automaton has 3992 states and 6384 transitions. Word has length 70 [2020-12-22 07:17:45,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:17:45,087 INFO L481 AbstractCegarLoop]: Abstraction has 3992 states and 6384 transitions. [2020-12-22 07:17:45,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:17:45,087 INFO L276 IsEmpty]: Start isEmpty. Operand 3992 states and 6384 transitions. [2020-12-22 07:17:45,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 07:17:45,113 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:17:45,113 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 07:17:45,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:17:45,113 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:17:45,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:17:45,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1815229649, now seen corresponding path program 1 times [2020-12-22 07:17:45,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:17:45,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218616687] [2020-12-22 07:17:45,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:17:45,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:17:45,243 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 07:17:45,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218616687] [2020-12-22 07:17:45,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:17:45,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:17:45,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800225680] [2020-12-22 07:17:45,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:17:45,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:17:45,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:17:45,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:17:45,249 INFO L87 Difference]: Start difference. First operand 3992 states and 6384 transitions. Second operand 4 states. [2020-12-22 07:17:45,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:17:45,631 INFO L93 Difference]: Finished difference Result 13018 states and 20914 transitions. [2020-12-22 07:17:45,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:17:45,631 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-12-22 07:17:45,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:17:45,682 INFO L225 Difference]: With dead ends: 13018 [2020-12-22 07:17:45,682 INFO L226 Difference]: Without dead ends: 9105 [2020-12-22 07:17:45,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:17:45,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9105 states. [2020-12-22 07:17:46,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9105 to 6388. [2020-12-22 07:17:46,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6388 states. [2020-12-22 07:17:46,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6388 states to 6388 states and 10164 transitions. [2020-12-22 07:17:46,031 INFO L78 Accepts]: Start accepts. Automaton has 6388 states and 10164 transitions. Word has length 71 [2020-12-22 07:17:46,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:17:46,032 INFO L481 AbstractCegarLoop]: Abstraction has 6388 states and 10164 transitions. [2020-12-22 07:17:46,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:17:46,032 INFO L276 IsEmpty]: Start isEmpty. Operand 6388 states and 10164 transitions. [2020-12-22 07:17:46,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 07:17:46,033 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:17:46,033 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:17:46,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:17:46,033 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:17:46,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:17:46,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1147279688, now seen corresponding path program 1 times [2020-12-22 07:17:46,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:17:46,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865321146] [2020-12-22 07:17:46,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:17:46,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:17:46,096 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 07:17:46,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865321146] [2020-12-22 07:17:46,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:17:46,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:17:46,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445556309] [2020-12-22 07:17:46,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:17:46,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:17:46,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:17:46,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:17:46,098 INFO L87 Difference]: Start difference. First operand 6388 states and 10164 transitions. Second operand 4 states. [2020-12-22 07:17:46,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:17:46,728 INFO L93 Difference]: Finished difference Result 20047 states and 32019 transitions. [2020-12-22 07:17:46,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:17:46,729 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-12-22 07:17:46,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:17:46,766 INFO L225 Difference]: With dead ends: 20047 [2020-12-22 07:17:46,767 INFO L226 Difference]: Without dead ends: 13738 [2020-12-22 07:17:46,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:17:46,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13738 states. [2020-12-22 07:17:47,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13738 to 10020. [2020-12-22 07:17:47,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10020 states. [2020-12-22 07:17:47,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10020 states to 10020 states and 15856 transitions. [2020-12-22 07:17:47,354 INFO L78 Accepts]: Start accepts. Automaton has 10020 states and 15856 transitions. Word has length 72 [2020-12-22 07:17:47,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:17:47,355 INFO L481 AbstractCegarLoop]: Abstraction has 10020 states and 15856 transitions. [2020-12-22 07:17:47,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:17:47,355 INFO L276 IsEmpty]: Start isEmpty. Operand 10020 states and 15856 transitions. [2020-12-22 07:17:47,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 07:17:47,356 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:17:47,356 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:17:47,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:17:47,356 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:17:47,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:17:47,357 INFO L82 PathProgramCache]: Analyzing trace with hash -856706640, now seen corresponding path program 1 times [2020-12-22 07:17:47,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:17:47,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194146333] [2020-12-22 07:17:47,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:17:47,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:17:47,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:17:47,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194146333] [2020-12-22 07:17:47,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:17:47,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:17:47,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124630082] [2020-12-22 07:17:47,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:17:47,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:17:47,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:17:47,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:17:47,535 INFO L87 Difference]: Start difference. First operand 10020 states and 15856 transitions. Second operand 4 states. [2020-12-22 07:17:48,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:17:48,374 INFO L93 Difference]: Finished difference Result 29688 states and 46962 transitions. [2020-12-22 07:17:48,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:17:48,375 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 74 [2020-12-22 07:17:48,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:17:48,418 INFO L225 Difference]: With dead ends: 29688 [2020-12-22 07:17:48,418 INFO L226 Difference]: Without dead ends: 19677 [2020-12-22 07:17:48,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:17:48,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19677 states. [2020-12-22 07:17:49,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19677 to 19675. [2020-12-22 07:17:49,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19675 states. [2020-12-22 07:17:49,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19675 states to 19675 states and 30894 transitions. [2020-12-22 07:17:49,441 INFO L78 Accepts]: Start accepts. Automaton has 19675 states and 30894 transitions. Word has length 74 [2020-12-22 07:17:49,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:17:49,444 INFO L481 AbstractCegarLoop]: Abstraction has 19675 states and 30894 transitions. [2020-12-22 07:17:49,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:17:49,444 INFO L276 IsEmpty]: Start isEmpty. Operand 19675 states and 30894 transitions. [2020-12-22 07:17:49,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 07:17:49,446 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:17:49,446 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:17:49,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:17:49,446 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:17:49,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:17:49,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1857988380, now seen corresponding path program 1 times [2020-12-22 07:17:49,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:17:49,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3264423] [2020-12-22 07:17:49,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:17:49,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:17:49,485 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 07:17:49,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3264423] [2020-12-22 07:17:49,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:17:49,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:17:49,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855238048] [2020-12-22 07:17:49,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:17:49,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:17:49,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:17:49,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:17:49,488 INFO L87 Difference]: Start difference. First operand 19675 states and 30894 transitions. Second operand 3 states. [2020-12-22 07:17:51,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:17:51,030 INFO L93 Difference]: Finished difference Result 58987 states and 92620 transitions. [2020-12-22 07:17:51,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:17:51,031 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 75 [2020-12-22 07:17:51,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:17:51,126 INFO L225 Difference]: With dead ends: 58987 [2020-12-22 07:17:51,127 INFO L226 Difference]: Without dead ends: 39340 [2020-12-22 07:17:51,154 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 07:17:51,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39340 states. [2020-12-22 07:17:52,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39340 to 19677. [2020-12-22 07:17:52,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19677 states. [2020-12-22 07:17:52,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19677 states to 19677 states and 30896 transitions. [2020-12-22 07:17:52,245 INFO L78 Accepts]: Start accepts. Automaton has 19677 states and 30896 transitions. Word has length 75 [2020-12-22 07:17:52,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:17:52,245 INFO L481 AbstractCegarLoop]: Abstraction has 19677 states and 30896 transitions. [2020-12-22 07:17:52,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:17:52,246 INFO L276 IsEmpty]: Start isEmpty. Operand 19677 states and 30896 transitions. [2020-12-22 07:17:52,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:17:52,247 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:17:52,247 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:17:52,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:17:52,247 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:17:52,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:17:52,248 INFO L82 PathProgramCache]: Analyzing trace with hash 424514133, now seen corresponding path program 1 times [2020-12-22 07:17:52,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:17:52,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982416654] [2020-12-22 07:17:52,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:17:52,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:17:52,365 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 07:17:52,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982416654] [2020-12-22 07:17:52,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:17:52,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:17:52,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514129753] [2020-12-22 07:17:52,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:17:52,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:17:52,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:17:52,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:17:52,368 INFO L87 Difference]: Start difference. First operand 19677 states and 30896 transitions. Second operand 4 states. [2020-12-22 07:17:53,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:17:53,762 INFO L93 Difference]: Finished difference Result 58291 states and 91488 transitions. [2020-12-22 07:17:53,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:17:53,763 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 76 [2020-12-22 07:17:53,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:17:53,863 INFO L225 Difference]: With dead ends: 58291 [2020-12-22 07:17:53,863 INFO L226 Difference]: Without dead ends: 38626 [2020-12-22 07:17:53,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:17:53,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38626 states. [2020-12-22 07:17:55,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38626 to 38624. [2020-12-22 07:17:55,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38624 states. [2020-12-22 07:17:55,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38624 states to 38624 states and 60157 transitions. [2020-12-22 07:17:55,358 INFO L78 Accepts]: Start accepts. Automaton has 38624 states and 60157 transitions. Word has length 76 [2020-12-22 07:17:55,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:17:55,359 INFO L481 AbstractCegarLoop]: Abstraction has 38624 states and 60157 transitions. [2020-12-22 07:17:55,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:17:55,359 INFO L276 IsEmpty]: Start isEmpty. Operand 38624 states and 60157 transitions. [2020-12-22 07:17:55,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:17:55,361 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:17:55,361 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:17:55,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:17:55,361 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:17:55,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:17:55,362 INFO L82 PathProgramCache]: Analyzing trace with hash 551656516, now seen corresponding path program 1 times [2020-12-22 07:17:55,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:17:55,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327226399] [2020-12-22 07:17:55,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:17:55,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:17:55,447 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 07:17:55,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327226399] [2020-12-22 07:17:55,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:17:55,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:17:55,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394166874] [2020-12-22 07:17:55,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:17:55,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:17:55,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:17:55,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:17:55,450 INFO L87 Difference]: Start difference. First operand 38624 states and 60157 transitions. Second operand 4 states. [2020-12-22 07:17:58,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:17:58,094 INFO L93 Difference]: Finished difference Result 114364 states and 178019 transitions. [2020-12-22 07:17:58,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:17:58,094 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 76 [2020-12-22 07:17:58,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:17:58,243 INFO L225 Difference]: With dead ends: 114364 [2020-12-22 07:17:58,244 INFO L226 Difference]: Without dead ends: 75786 [2020-12-22 07:17:58,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:17:58,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75786 states. [2020-12-22 07:18:01,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75786 to 75784. [2020-12-22 07:18:01,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75784 states. [2020-12-22 07:18:01,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75784 states to 75784 states and 117031 transitions. [2020-12-22 07:18:01,542 INFO L78 Accepts]: Start accepts. Automaton has 75784 states and 117031 transitions. Word has length 76 [2020-12-22 07:18:01,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:18:01,542 INFO L481 AbstractCegarLoop]: Abstraction has 75784 states and 117031 transitions. [2020-12-22 07:18:01,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:18:01,542 INFO L276 IsEmpty]: Start isEmpty. Operand 75784 states and 117031 transitions. [2020-12-22 07:18:01,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 07:18:01,544 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:18:01,544 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:18:01,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:18:01,545 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:18:01,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:18:01,545 INFO L82 PathProgramCache]: Analyzing trace with hash -656359944, now seen corresponding path program 1 times [2020-12-22 07:18:01,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:18:01,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982011161] [2020-12-22 07:18:01,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:18:01,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:18:01,585 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 07:18:01,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982011161] [2020-12-22 07:18:01,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:18:01,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:18:01,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814101224] [2020-12-22 07:18:01,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:18:01,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:18:01,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:18:01,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:18:01,588 INFO L87 Difference]: Start difference. First operand 75784 states and 117031 transitions. Second operand 3 states. [2020-12-22 07:18:06,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:18:06,950 INFO L93 Difference]: Finished difference Result 227228 states and 350901 transitions. [2020-12-22 07:18:06,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:18:06,951 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 07:18:06,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:18:07,218 INFO L225 Difference]: With dead ends: 227228 [2020-12-22 07:18:07,218 INFO L226 Difference]: Without dead ends: 151518 [2020-12-22 07:18:07,458 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 07:18:07,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151518 states. [2020-12-22 07:18:11,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151518 to 75792. [2020-12-22 07:18:11,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75792 states. [2020-12-22 07:18:11,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75792 states to 75792 states and 117039 transitions. [2020-12-22 07:18:11,309 INFO L78 Accepts]: Start accepts. Automaton has 75792 states and 117039 transitions. Word has length 77 [2020-12-22 07:18:11,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:18:11,309 INFO L481 AbstractCegarLoop]: Abstraction has 75792 states and 117039 transitions. [2020-12-22 07:18:11,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:18:11,309 INFO L276 IsEmpty]: Start isEmpty. Operand 75792 states and 117039 transitions. [2020-12-22 07:18:11,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 07:18:11,311 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:18:11,311 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:18:11,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:18:11,312 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:18:11,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:18:11,312 INFO L82 PathProgramCache]: Analyzing trace with hash 834408617, now seen corresponding path program 1 times [2020-12-22 07:18:11,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:18:11,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344971316] [2020-12-22 07:18:11,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:18:11,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:18:11,402 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 07:18:11,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344971316] [2020-12-22 07:18:11,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:18:11,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:18:11,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415682738] [2020-12-22 07:18:11,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:18:11,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:18:11,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:18:11,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:18:11,404 INFO L87 Difference]: Start difference. First operand 75792 states and 117039 transitions. Second operand 4 states. [2020-12-22 07:18:17,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:18:17,280 INFO L93 Difference]: Finished difference Result 224404 states and 346298 transitions. [2020-12-22 07:18:17,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:18:17,281 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 78 [2020-12-22 07:18:17,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:18:17,514 INFO L225 Difference]: With dead ends: 224404 [2020-12-22 07:18:17,514 INFO L226 Difference]: Without dead ends: 148667 [2020-12-22 07:18:17,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:18:17,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148667 states. [2020-12-22 07:18:23,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148667 to 148665. [2020-12-22 07:18:23,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148665 states. [2020-12-22 07:18:24,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148665 states to 148665 states and 227541 transitions. [2020-12-22 07:18:24,145 INFO L78 Accepts]: Start accepts. Automaton has 148665 states and 227541 transitions. Word has length 78 [2020-12-22 07:18:24,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:18:24,145 INFO L481 AbstractCegarLoop]: Abstraction has 148665 states and 227541 transitions. [2020-12-22 07:18:24,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:18:24,145 INFO L276 IsEmpty]: Start isEmpty. Operand 148665 states and 227541 transitions. [2020-12-22 07:18:24,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 07:18:24,148 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:18:24,149 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:18:24,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:18:24,149 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:18:24,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:18:24,149 INFO L82 PathProgramCache]: Analyzing trace with hash 640680152, now seen corresponding path program 1 times [2020-12-22 07:18:24,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:18:24,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649222131] [2020-12-22 07:18:24,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:18:24,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:18:24,235 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 07:18:24,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649222131] [2020-12-22 07:18:24,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:18:24,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:18:24,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783315982] [2020-12-22 07:18:24,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:18:24,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:18:24,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:18:24,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:18:24,238 INFO L87 Difference]: Start difference. First operand 148665 states and 227541 transitions. Second operand 4 states. [2020-12-22 07:18:35,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:18:35,846 INFO L93 Difference]: Finished difference Result 440021 states and 672927 transitions. [2020-12-22 07:18:35,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:18:35,846 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 78 [2020-12-22 07:18:35,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:18:36,390 INFO L225 Difference]: With dead ends: 440021 [2020-12-22 07:18:36,390 INFO L226 Difference]: Without dead ends: 291515 [2020-12-22 07:18:36,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:18:36,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291515 states. [2020-12-22 07:18:49,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291515 to 291513. [2020-12-22 07:18:49,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291513 states. [2020-12-22 07:18:50,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291513 states to 291513 states and 442037 transitions. [2020-12-22 07:18:50,658 INFO L78 Accepts]: Start accepts. Automaton has 291513 states and 442037 transitions. Word has length 78 [2020-12-22 07:18:50,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:18:50,659 INFO L481 AbstractCegarLoop]: Abstraction has 291513 states and 442037 transitions. [2020-12-22 07:18:50,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:18:50,659 INFO L276 IsEmpty]: Start isEmpty. Operand 291513 states and 442037 transitions. [2020-12-22 07:18:50,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 07:18:50,665 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:18:50,665 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:18:50,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:18:50,665 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:18:50,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:18:50,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1890599668, now seen corresponding path program 1 times [2020-12-22 07:18:50,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:18:50,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317351740] [2020-12-22 07:18:50,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:18:50,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:18:50,703 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 07:18:50,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317351740] [2020-12-22 07:18:50,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:18:50,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:18:50,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741478062] [2020-12-22 07:18:50,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:18:50,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:18:50,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:18:50,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:18:50,706 INFO L87 Difference]: Start difference. First operand 291513 states and 442037 transitions. Second operand 3 states. [2020-12-22 07:19:13,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:19:13,988 INFO L93 Difference]: Finished difference Result 873245 states and 1324519 transitions. [2020-12-22 07:19:13,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:19:13,988 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 07:19:13,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:19:15,525 INFO L225 Difference]: With dead ends: 873245 [2020-12-22 07:19:15,525 INFO L226 Difference]: Without dead ends: 582795 [2020-12-22 07:19:15,824 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 07:19:16,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582795 states. [2020-12-22 07:19:32,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582795 to 291545. [2020-12-22 07:19:32,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291545 states. [2020-12-22 07:19:33,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291545 states to 291545 states and 442069 transitions. [2020-12-22 07:19:33,643 INFO L78 Accepts]: Start accepts. Automaton has 291545 states and 442069 transitions. Word has length 79 [2020-12-22 07:19:33,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:19:33,644 INFO L481 AbstractCegarLoop]: Abstraction has 291545 states and 442069 transitions. [2020-12-22 07:19:33,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:19:33,644 INFO L276 IsEmpty]: Start isEmpty. Operand 291545 states and 442069 transitions. [2020-12-22 07:19:33,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 07:19:33,668 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:19:33,668 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:19:33,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 07:19:33,668 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:19:33,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:19:33,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1453451011, now seen corresponding path program 1 times [2020-12-22 07:19:33,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:19:33,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874816568] [2020-12-22 07:19:33,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:19:33,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:19:33,893 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 07:19:33,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874816568] [2020-12-22 07:19:33,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:19:33,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:19:33,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37489809] [2020-12-22 07:19:33,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:19:33,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:19:33,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:19:33,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:19:33,899 INFO L87 Difference]: Start difference. First operand 291545 states and 442069 transitions. Second operand 4 states.