/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_7.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:26:51,338 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:26:51,341 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:26:51,380 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 22:26:51,380 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 22:26:51,382 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 22:26:51,384 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 22:26:51,387 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 22:26:51,389 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 22:26:51,390 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 22:26:51,392 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 22:26:51,393 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2020-11-06 22:26:51,455 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:26:51,457 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:26:51,458 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:26:51,459 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-06 22:26:51,491 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:26:51,491 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:26:51,493 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:26:51,494 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:26:51,494 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:26:51,494 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:26:51,494 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:26:51,495 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:26:51,495 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:26:51,495 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:26:51,496 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:26:51,496 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:26:51,496 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:26:51,497 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:26:51,497 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:26:51,497 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:26:51,497 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:26:51,498 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:26:51,498 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:26:51,498 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:26:51,499 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:26:51,499 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:26:51,499 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:26:51,500 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:26:51,500 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:26:51,500 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:26:51,500 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:26:51,501 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:26:51,501 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:26:51,501 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:26:52,014 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:26:52,065 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:26:52,069 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:26:52,071 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:26:52,072 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:26:52,073 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_7.c [2020-11-06 22:26:52,184 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91a96aa1b/5cd78b25ca8c43c3a1b1477ad9d3b1e4/FLAGb99fed7cd [2020-11-06 22:26:52,897 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:26:52,898 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_7.c [2020-11-06 22:26:52,914 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91a96aa1b/5cd78b25ca8c43c3a1b1477ad9d3b1e4/FLAGb99fed7cd [2020-11-06 22:26:53,284 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91a96aa1b/5cd78b25ca8c43c3a1b1477ad9d3b1e4 [2020-11-06 22:26:53,289 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:26:53,297 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:26:53,303 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:26:53,304 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:26:53,308 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:26:53,310 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:26:53" (1/1) ... [2020-11-06 22:26:53,317 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fa4d755 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:53, skipping insertion in model container [2020-11-06 22:26:53,317 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:26:53" (1/1) ... [2020-11-06 22:26:53,327 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:26:53,357 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:26:53,564 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:26:53,578 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:26:53,606 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:26:53,627 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:26:53,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:53 WrapperNode [2020-11-06 22:26:53,628 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:26:53,629 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:26:53,630 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:26:53,630 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:26:53,645 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:53" (1/1) ... [2020-11-06 22:26:53,646 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:53" (1/1) ... [2020-11-06 22:26:53,655 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:53" (1/1) ... [2020-11-06 22:26:53,655 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:53" (1/1) ... [2020-11-06 22:26:53,663 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:53" (1/1) ... [2020-11-06 22:26:53,670 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:53" (1/1) ... [2020-11-06 22:26:53,672 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:53" (1/1) ... [2020-11-06 22:26:53,675 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:26:53,677 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:26:53,677 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:26:53,677 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:26:53,678 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:53" (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 [2020-11-06 22:26:53,776 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:26:53,777 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:26:53,777 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:26:53,777 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:26:53,778 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:26:53,778 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:26:53,778 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:26:53,779 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:26:53,779 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-06 22:26:53,779 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:26:53,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:26:53,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:26:53,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:26:53,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:26:53,782 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:26:53,783 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:26:54,568 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:26:54,568 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-06 22:26:54,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:26:54 BoogieIcfgContainer [2020-11-06 22:26:54,571 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:26:54,574 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:26:54,574 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:26:54,579 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:26:54,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:26:53" (1/3) ... [2020-11-06 22:26:54,581 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34e521ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:26:54, skipping insertion in model container [2020-11-06 22:26:54,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:53" (2/3) ... [2020-11-06 22:26:54,581 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34e521ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:26:54, skipping insertion in model container [2020-11-06 22:26:54,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:26:54" (3/3) ... [2020-11-06 22:26:54,583 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_7.c [2020-11-06 22:26:54,600 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:26:54,607 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:26:54,621 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:26:54,649 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:26:54,650 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:26:54,650 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:26:54,650 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:26:54,650 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:26:54,650 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:26:54,650 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:26:54,651 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:26:54,677 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-11-06 22:26:54,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-06 22:26:54,684 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:26:54,685 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:26:54,685 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:26:54,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:26:54,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1356734652, now seen corresponding path program 1 times [2020-11-06 22:26:54,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:26:54,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656835993] [2020-11-06 22:26:54,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:26:54,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:55,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:26:55,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:55,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:26:55,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656835993] [2020-11-06 22:26:55,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:26:55,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:26:55,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008364181] [2020-11-06 22:26:55,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:26:55,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:26:55,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:26:55,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:26:55,225 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 4 states. [2020-11-06 22:26:55,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:26:55,764 INFO L93 Difference]: Finished difference Result 74 states and 121 transitions. [2020-11-06 22:26:55,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:26:55,767 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-11-06 22:26:55,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:26:55,779 INFO L225 Difference]: With dead ends: 74 [2020-11-06 22:26:55,780 INFO L226 Difference]: Without dead ends: 55 [2020-11-06 22:26:55,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:26:55,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-11-06 22:26:55,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 40. [2020-11-06 22:26:55,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-11-06 22:26:55,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 67 transitions. [2020-11-06 22:26:55,835 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 67 transitions. Word has length 19 [2020-11-06 22:26:55,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:26:55,835 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 67 transitions. [2020-11-06 22:26:55,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:26:55,836 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 67 transitions. [2020-11-06 22:26:55,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-06 22:26:55,837 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:26:55,837 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:26:55,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:26:55,838 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:26:55,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:26:55,839 INFO L82 PathProgramCache]: Analyzing trace with hash 2057799230, now seen corresponding path program 1 times [2020-11-06 22:26:55,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:26:55,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963423631] [2020-11-06 22:26:55,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:26:55,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:55,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:26:55,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:56,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:26:56,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963423631] [2020-11-06 22:26:56,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:26:56,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:26:56,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273554697] [2020-11-06 22:26:56,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:26:56,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:26:56,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:26:56,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:26:56,011 INFO L87 Difference]: Start difference. First operand 40 states and 67 transitions. Second operand 4 states. [2020-11-06 22:26:56,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:26:56,332 INFO L93 Difference]: Finished difference Result 89 states and 155 transitions. [2020-11-06 22:26:56,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:26:56,333 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-11-06 22:26:56,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:26:56,336 INFO L225 Difference]: With dead ends: 89 [2020-11-06 22:26:56,336 INFO L226 Difference]: Without dead ends: 55 [2020-11-06 22:26:56,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:26:56,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-11-06 22:26:56,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-11-06 22:26:56,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-06 22:26:56,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 91 transitions. [2020-11-06 22:26:56,353 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 91 transitions. Word has length 19 [2020-11-06 22:26:56,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:26:56,354 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 91 transitions. [2020-11-06 22:26:56,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:26:56,354 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 91 transitions. [2020-11-06 22:26:56,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-06 22:26:56,355 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:26:56,356 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] [2020-11-06 22:26:56,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 22:26:56,356 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:26:56,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:26:56,357 INFO L82 PathProgramCache]: Analyzing trace with hash -884260222, now seen corresponding path program 1 times [2020-11-06 22:26:56,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:26:56,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826565183] [2020-11-06 22:26:56,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:26:56,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:56,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:26:56,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:56,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:26:56,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826565183] [2020-11-06 22:26:56,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:26:56,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:26:56,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433972310] [2020-11-06 22:26:56,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:26:56,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:26:56,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:26:56,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:26:56,595 INFO L87 Difference]: Start difference. First operand 54 states and 91 transitions. Second operand 4 states. [2020-11-06 22:26:56,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:26:56,840 INFO L93 Difference]: Finished difference Result 83 states and 138 transitions. [2020-11-06 22:26:56,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:26:56,841 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-11-06 22:26:56,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:26:56,842 INFO L225 Difference]: With dead ends: 83 [2020-11-06 22:26:56,843 INFO L226 Difference]: Without dead ends: 58 [2020-11-06 22:26:56,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:26:56,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-06 22:26:56,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-11-06 22:26:56,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-11-06 22:26:56,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 93 transitions. [2020-11-06 22:26:56,857 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 93 transitions. Word has length 20 [2020-11-06 22:26:56,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:26:56,857 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 93 transitions. [2020-11-06 22:26:56,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:26:56,858 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 93 transitions. [2020-11-06 22:26:56,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-06 22:26:56,859 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:26:56,859 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] [2020-11-06 22:26:56,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-06 22:26:56,859 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:26:56,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:26:56,860 INFO L82 PathProgramCache]: Analyzing trace with hash -626094784, now seen corresponding path program 1 times [2020-11-06 22:26:56,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:26:56,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842460722] [2020-11-06 22:26:56,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:26:56,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:56,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:26:56,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:56,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:26:56,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842460722] [2020-11-06 22:26:56,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:26:56,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:26:56,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510202028] [2020-11-06 22:26:56,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:26:56,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:26:56,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:26:56,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:26:56,971 INFO L87 Difference]: Start difference. First operand 57 states and 93 transitions. Second operand 4 states. [2020-11-06 22:26:57,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:26:57,233 INFO L93 Difference]: Finished difference Result 149 states and 254 transitions. [2020-11-06 22:26:57,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:26:57,234 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-11-06 22:26:57,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:26:57,236 INFO L225 Difference]: With dead ends: 149 [2020-11-06 22:26:57,236 INFO L226 Difference]: Without dead ends: 101 [2020-11-06 22:26:57,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:26:57,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-11-06 22:26:57,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2020-11-06 22:26:57,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-11-06 22:26:57,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 166 transitions. [2020-11-06 22:26:57,252 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 166 transitions. Word has length 20 [2020-11-06 22:26:57,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:26:57,252 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 166 transitions. [2020-11-06 22:26:57,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:26:57,253 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 166 transitions. [2020-11-06 22:26:57,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-06 22:26:57,254 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:26:57,254 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] [2020-11-06 22:26:57,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-06 22:26:57,255 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:26:57,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:26:57,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1327159362, now seen corresponding path program 1 times [2020-11-06 22:26:57,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:26:57,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467465078] [2020-11-06 22:26:57,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:26:57,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:57,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:26:57,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:57,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:26:57,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467465078] [2020-11-06 22:26:57,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:26:57,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:26:57,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066916356] [2020-11-06 22:26:57,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:26:57,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:26:57,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:26:57,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:26:57,368 INFO L87 Difference]: Start difference. First operand 100 states and 166 transitions. Second operand 4 states. [2020-11-06 22:26:57,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:26:57,602 INFO L93 Difference]: Finished difference Result 128 states and 213 transitions. [2020-11-06 22:26:57,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:26:57,603 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-11-06 22:26:57,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:26:57,605 INFO L225 Difference]: With dead ends: 128 [2020-11-06 22:26:57,606 INFO L226 Difference]: Without dead ends: 125 [2020-11-06 22:26:57,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:26:57,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-11-06 22:26:57,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 100. [2020-11-06 22:26:57,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-11-06 22:26:57,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 164 transitions. [2020-11-06 22:26:57,622 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 164 transitions. Word has length 20 [2020-11-06 22:26:57,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:26:57,623 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 164 transitions. [2020-11-06 22:26:57,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:26:57,623 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 164 transitions. [2020-11-06 22:26:57,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-06 22:26:57,624 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:26:57,624 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] [2020-11-06 22:26:57,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-06 22:26:57,625 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:26:57,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:26:57,626 INFO L82 PathProgramCache]: Analyzing trace with hash 2072547273, now seen corresponding path program 1 times [2020-11-06 22:26:57,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:26:57,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637259814] [2020-11-06 22:26:57,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:26:57,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:57,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:26:57,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:57,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:26:57,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637259814] [2020-11-06 22:26:57,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:26:57,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:26:57,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26850046] [2020-11-06 22:26:57,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:26:57,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:26:57,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:26:57,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:26:57,776 INFO L87 Difference]: Start difference. First operand 100 states and 164 transitions. Second operand 4 states. [2020-11-06 22:26:58,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:26:58,022 INFO L93 Difference]: Finished difference Result 180 states and 301 transitions. [2020-11-06 22:26:58,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:26:58,023 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-11-06 22:26:58,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:26:58,025 INFO L225 Difference]: With dead ends: 180 [2020-11-06 22:26:58,025 INFO L226 Difference]: Without dead ends: 177 [2020-11-06 22:26:58,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:26:58,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-11-06 22:26:58,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 136. [2020-11-06 22:26:58,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-11-06 22:26:58,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 222 transitions. [2020-11-06 22:26:58,043 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 222 transitions. Word has length 21 [2020-11-06 22:26:58,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:26:58,044 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 222 transitions. [2020-11-06 22:26:58,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:26:58,044 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 222 transitions. [2020-11-06 22:26:58,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-06 22:26:58,046 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:26:58,046 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] [2020-11-06 22:26:58,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-06 22:26:58,046 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:26:58,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:26:58,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1521355445, now seen corresponding path program 1 times [2020-11-06 22:26:58,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:26:58,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261305681] [2020-11-06 22:26:58,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:26:58,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:58,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:26:58,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:58,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:26:58,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261305681] [2020-11-06 22:26:58,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:26:58,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:26:58,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957181476] [2020-11-06 22:26:58,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:26:58,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:26:58,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:26:58,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:26:58,149 INFO L87 Difference]: Start difference. First operand 136 states and 222 transitions. Second operand 4 states. [2020-11-06 22:26:58,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:26:58,360 INFO L93 Difference]: Finished difference Result 312 states and 517 transitions. [2020-11-06 22:26:58,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:26:58,361 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-11-06 22:26:58,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:26:58,363 INFO L225 Difference]: With dead ends: 312 [2020-11-06 22:26:58,363 INFO L226 Difference]: Without dead ends: 185 [2020-11-06 22:26:58,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:26:58,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-11-06 22:26:58,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2020-11-06 22:26:58,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-11-06 22:26:58,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 296 transitions. [2020-11-06 22:26:58,382 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 296 transitions. Word has length 21 [2020-11-06 22:26:58,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:26:58,383 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 296 transitions. [2020-11-06 22:26:58,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:26:58,383 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 296 transitions. [2020-11-06 22:26:58,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-06 22:26:58,385 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:26:58,385 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] [2020-11-06 22:26:58,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-06 22:26:58,386 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:26:58,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:26:58,386 INFO L82 PathProgramCache]: Analyzing trace with hash -168884309, now seen corresponding path program 1 times [2020-11-06 22:26:58,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:26:58,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105230359] [2020-11-06 22:26:58,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:26:58,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:58,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:26:58,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:58,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:26:58,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105230359] [2020-11-06 22:26:58,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:26:58,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:26:58,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053581313] [2020-11-06 22:26:58,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:26:58,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:26:58,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:26:58,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:26:58,490 INFO L87 Difference]: Start difference. First operand 184 states and 296 transitions. Second operand 4 states. [2020-11-06 22:26:58,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:26:58,747 INFO L93 Difference]: Finished difference Result 278 states and 447 transitions. [2020-11-06 22:26:58,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:26:58,748 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-11-06 22:26:58,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:26:58,749 INFO L225 Difference]: With dead ends: 278 [2020-11-06 22:26:58,749 INFO L226 Difference]: Without dead ends: 191 [2020-11-06 22:26:58,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:26:58,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-11-06 22:26:58,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 190. [2020-11-06 22:26:58,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-11-06 22:26:58,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 300 transitions. [2020-11-06 22:26:58,767 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 300 transitions. Word has length 22 [2020-11-06 22:26:58,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:26:58,768 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 300 transitions. [2020-11-06 22:26:58,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:26:58,768 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 300 transitions. [2020-11-06 22:26:58,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-06 22:26:58,770 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:26:58,770 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] [2020-11-06 22:26:58,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-06 22:26:58,770 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:26:58,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:26:58,771 INFO L82 PathProgramCache]: Analyzing trace with hash 89281129, now seen corresponding path program 1 times [2020-11-06 22:26:58,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:26:58,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963199172] [2020-11-06 22:26:58,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:26:58,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:58,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:26:58,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:58,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:26:58,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963199172] [2020-11-06 22:26:58,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:26:58,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:26:58,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188920523] [2020-11-06 22:26:58,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:26:58,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:26:58,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:26:58,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:26:58,862 INFO L87 Difference]: Start difference. First operand 190 states and 300 transitions. Second operand 4 states. [2020-11-06 22:26:59,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:26:59,093 INFO L93 Difference]: Finished difference Result 334 states and 535 transitions. [2020-11-06 22:26:59,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:26:59,094 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-11-06 22:26:59,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:26:59,097 INFO L225 Difference]: With dead ends: 334 [2020-11-06 22:26:59,097 INFO L226 Difference]: Without dead ends: 331 [2020-11-06 22:26:59,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:26:59,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2020-11-06 22:26:59,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 266. [2020-11-06 22:26:59,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-11-06 22:26:59,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 412 transitions. [2020-11-06 22:26:59,113 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 412 transitions. Word has length 22 [2020-11-06 22:26:59,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:26:59,113 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 412 transitions. [2020-11-06 22:26:59,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:26:59,113 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 412 transitions. [2020-11-06 22:26:59,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-06 22:26:59,115 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:26:59,116 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] [2020-11-06 22:26:59,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-06 22:26:59,116 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:26:59,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:26:59,117 INFO L82 PathProgramCache]: Analyzing trace with hash 790345707, now seen corresponding path program 1 times [2020-11-06 22:26:59,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:26:59,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822592976] [2020-11-06 22:26:59,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:26:59,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:59,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:26:59,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:59,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:26:59,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822592976] [2020-11-06 22:26:59,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:26:59,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:26:59,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800530449] [2020-11-06 22:26:59,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:26:59,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:26:59,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:26:59,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:26:59,211 INFO L87 Difference]: Start difference. First operand 266 states and 412 transitions. Second operand 4 states. [2020-11-06 22:26:59,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:26:59,453 INFO L93 Difference]: Finished difference Result 606 states and 943 transitions. [2020-11-06 22:26:59,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:26:59,460 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-11-06 22:26:59,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:26:59,462 INFO L225 Difference]: With dead ends: 606 [2020-11-06 22:26:59,462 INFO L226 Difference]: Without dead ends: 355 [2020-11-06 22:26:59,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:26:59,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2020-11-06 22:26:59,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 354. [2020-11-06 22:26:59,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2020-11-06 22:26:59,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 536 transitions. [2020-11-06 22:26:59,487 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 536 transitions. Word has length 22 [2020-11-06 22:26:59,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:26:59,487 INFO L481 AbstractCegarLoop]: Abstraction has 354 states and 536 transitions. [2020-11-06 22:26:59,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:26:59,487 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 536 transitions. [2020-11-06 22:26:59,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-06 22:26:59,489 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:26:59,489 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:26:59,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-06 22:26:59,490 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:26:59,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:26:59,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1520582058, now seen corresponding path program 1 times [2020-11-06 22:26:59,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:26:59,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014892410] [2020-11-06 22:26:59,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:26:59,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:59,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:26:59,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:59,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:26:59,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014892410] [2020-11-06 22:26:59,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:26:59,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:26:59,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601731539] [2020-11-06 22:26:59,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:26:59,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:26:59,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:26:59,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:26:59,577 INFO L87 Difference]: Start difference. First operand 354 states and 536 transitions. Second operand 4 states. [2020-11-06 22:26:59,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:26:59,790 INFO L93 Difference]: Finished difference Result 530 states and 799 transitions. [2020-11-06 22:26:59,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:26:59,791 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-11-06 22:26:59,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:26:59,793 INFO L225 Difference]: With dead ends: 530 [2020-11-06 22:26:59,794 INFO L226 Difference]: Without dead ends: 363 [2020-11-06 22:26:59,795 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:26:59,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2020-11-06 22:26:59,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 362. [2020-11-06 22:26:59,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 362 states. [2020-11-06 22:26:59,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 536 transitions. [2020-11-06 22:26:59,814 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 536 transitions. Word has length 23 [2020-11-06 22:26:59,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:26:59,814 INFO L481 AbstractCegarLoop]: Abstraction has 362 states and 536 transitions. [2020-11-06 22:26:59,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:26:59,814 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 536 transitions. [2020-11-06 22:26:59,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-06 22:26:59,816 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:26:59,816 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:26:59,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-06 22:26:59,816 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:26:59,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:26:59,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1262416620, now seen corresponding path program 1 times [2020-11-06 22:26:59,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:26:59,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343017626] [2020-11-06 22:26:59,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:26:59,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:59,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:26:59,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:26:59,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:26:59,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343017626] [2020-11-06 22:26:59,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:26:59,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:26:59,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680216613] [2020-11-06 22:26:59,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:26:59,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:26:59,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:26:59,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:26:59,896 INFO L87 Difference]: Start difference. First operand 362 states and 536 transitions. Second operand 4 states. [2020-11-06 22:27:00,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:27:00,124 INFO L93 Difference]: Finished difference Result 622 states and 931 transitions. [2020-11-06 22:27:00,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:27:00,125 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-11-06 22:27:00,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:27:00,129 INFO L225 Difference]: With dead ends: 622 [2020-11-06 22:27:00,129 INFO L226 Difference]: Without dead ends: 619 [2020-11-06 22:27:00,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:27:00,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2020-11-06 22:27:00,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 522. [2020-11-06 22:27:00,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 522 states. [2020-11-06 22:27:00,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 752 transitions. [2020-11-06 22:27:00,156 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 752 transitions. Word has length 23 [2020-11-06 22:27:00,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:27:00,156 INFO L481 AbstractCegarLoop]: Abstraction has 522 states and 752 transitions. [2020-11-06 22:27:00,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:27:00,156 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 752 transitions. [2020-11-06 22:27:00,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-06 22:27:00,158 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:27:00,158 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:27:00,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-06 22:27:00,159 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:27:00,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:27:00,159 INFO L82 PathProgramCache]: Analyzing trace with hash -561352042, now seen corresponding path program 1 times [2020-11-06 22:27:00,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:27:00,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787051315] [2020-11-06 22:27:00,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:27:00,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:27:00,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:27:00,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:27:00,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:27:00,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787051315] [2020-11-06 22:27:00,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:27:00,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:27:00,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741528713] [2020-11-06 22:27:00,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:27:00,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:27:00,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:27:00,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:27:00,242 INFO L87 Difference]: Start difference. First operand 522 states and 752 transitions. Second operand 4 states. [2020-11-06 22:27:00,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:27:00,476 INFO L93 Difference]: Finished difference Result 1182 states and 1699 transitions. [2020-11-06 22:27:00,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:27:00,477 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-11-06 22:27:00,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:27:00,482 INFO L225 Difference]: With dead ends: 1182 [2020-11-06 22:27:00,482 INFO L226 Difference]: Without dead ends: 683 [2020-11-06 22:27:00,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:27:00,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2020-11-06 22:27:00,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 682. [2020-11-06 22:27:00,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2020-11-06 22:27:00,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 952 transitions. [2020-11-06 22:27:00,522 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 952 transitions. Word has length 23 [2020-11-06 22:27:00,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:27:00,523 INFO L481 AbstractCegarLoop]: Abstraction has 682 states and 952 transitions. [2020-11-06 22:27:00,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:27:00,523 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 952 transitions. [2020-11-06 22:27:00,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-06 22:27:00,525 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:27:00,525 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] [2020-11-06 22:27:00,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-06 22:27:00,526 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:27:00,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:27:00,526 INFO L82 PathProgramCache]: Analyzing trace with hash -473528746, now seen corresponding path program 1 times [2020-11-06 22:27:00,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:27:00,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686776657] [2020-11-06 22:27:00,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:27:00,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:27:00,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:27:00,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:27:00,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:27:00,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686776657] [2020-11-06 22:27:00,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:27:00,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:27:00,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630970474] [2020-11-06 22:27:00,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:27:00,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:27:00,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:27:00,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:27:00,635 INFO L87 Difference]: Start difference. First operand 682 states and 952 transitions. Second operand 4 states. [2020-11-06 22:27:00,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:27:00,877 INFO L93 Difference]: Finished difference Result 1022 states and 1419 transitions. [2020-11-06 22:27:00,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:27:00,878 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-11-06 22:27:00,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:27:00,883 INFO L225 Difference]: With dead ends: 1022 [2020-11-06 22:27:00,883 INFO L226 Difference]: Without dead ends: 699 [2020-11-06 22:27:00,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:27:00,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2020-11-06 22:27:00,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 698. [2020-11-06 22:27:00,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 698 states. [2020-11-06 22:27:00,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 952 transitions. [2020-11-06 22:27:00,922 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 952 transitions. Word has length 24 [2020-11-06 22:27:00,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:27:00,924 INFO L481 AbstractCegarLoop]: Abstraction has 698 states and 952 transitions. [2020-11-06 22:27:00,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:27:00,925 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 952 transitions. [2020-11-06 22:27:00,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-06 22:27:00,926 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:27:00,926 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] [2020-11-06 22:27:00,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-06 22:27:00,927 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:27:00,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:27:00,927 INFO L82 PathProgramCache]: Analyzing trace with hash -215363308, now seen corresponding path program 1 times [2020-11-06 22:27:00,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:27:00,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243335059] [2020-11-06 22:27:00,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:27:00,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:27:00,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:27:01,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:27:01,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:27:01,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243335059] [2020-11-06 22:27:01,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:27:01,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:27:01,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135994879] [2020-11-06 22:27:01,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:27:01,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:27:01,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:27:01,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:27:01,024 INFO L87 Difference]: Start difference. First operand 698 states and 952 transitions. Second operand 4 states. [2020-11-06 22:27:01,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:27:01,308 INFO L93 Difference]: Finished difference Result 1166 states and 1595 transitions. [2020-11-06 22:27:01,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:27:01,309 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-11-06 22:27:01,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:27:01,316 INFO L225 Difference]: With dead ends: 1166 [2020-11-06 22:27:01,316 INFO L226 Difference]: Without dead ends: 1163 [2020-11-06 22:27:01,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:27:01,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2020-11-06 22:27:01,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 1034. [2020-11-06 22:27:01,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1034 states. [2020-11-06 22:27:01,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 1368 transitions. [2020-11-06 22:27:01,368 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 1368 transitions. Word has length 24 [2020-11-06 22:27:01,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:27:01,369 INFO L481 AbstractCegarLoop]: Abstraction has 1034 states and 1368 transitions. [2020-11-06 22:27:01,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:27:01,369 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 1368 transitions. [2020-11-06 22:27:01,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-06 22:27:01,372 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:27:01,372 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] [2020-11-06 22:27:01,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-11-06 22:27:01,373 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:27:01,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:27:01,373 INFO L82 PathProgramCache]: Analyzing trace with hash 485701270, now seen corresponding path program 1 times [2020-11-06 22:27:01,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:27:01,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693351432] [2020-11-06 22:27:01,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:27:01,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:27:01,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:27:01,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:27:01,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:27:01,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693351432] [2020-11-06 22:27:01,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:27:01,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:27:01,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768359047] [2020-11-06 22:27:01,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:27:01,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:27:01,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:27:01,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:27:01,473 INFO L87 Difference]: Start difference. First operand 1034 states and 1368 transitions. Second operand 4 states. [2020-11-06 22:27:01,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:27:01,715 INFO L93 Difference]: Finished difference Result 2318 states and 3035 transitions. [2020-11-06 22:27:01,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:27:01,716 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-11-06 22:27:01,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:27:01,723 INFO L225 Difference]: With dead ends: 2318 [2020-11-06 22:27:01,724 INFO L226 Difference]: Without dead ends: 1323 [2020-11-06 22:27:01,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:27:01,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1323 states. [2020-11-06 22:27:01,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1323 to 1322. [2020-11-06 22:27:01,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1322 states. [2020-11-06 22:27:01,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1322 states to 1322 states and 1672 transitions. [2020-11-06 22:27:01,791 INFO L78 Accepts]: Start accepts. Automaton has 1322 states and 1672 transitions. Word has length 24 [2020-11-06 22:27:01,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:27:01,791 INFO L481 AbstractCegarLoop]: Abstraction has 1322 states and 1672 transitions. [2020-11-06 22:27:01,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:27:01,791 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states and 1672 transitions. [2020-11-06 22:27:01,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-06 22:27:01,794 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:27:01,794 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] [2020-11-06 22:27:01,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-11-06 22:27:01,795 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:27:01,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:27:01,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1920363425, now seen corresponding path program 1 times [2020-11-06 22:27:01,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:27:01,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775374530] [2020-11-06 22:27:01,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:27:01,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:27:01,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:27:01,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:27:01,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:27:01,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775374530] [2020-11-06 22:27:01,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:27:01,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:27:01,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421574706] [2020-11-06 22:27:01,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:27:01,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:27:01,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:27:01,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:27:01,874 INFO L87 Difference]: Start difference. First operand 1322 states and 1672 transitions. Second operand 4 states. [2020-11-06 22:27:02,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:27:02,150 INFO L93 Difference]: Finished difference Result 1982 states and 2491 transitions. [2020-11-06 22:27:02,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:27:02,151 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-11-06 22:27:02,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:27:02,158 INFO L225 Difference]: With dead ends: 1982 [2020-11-06 22:27:02,159 INFO L226 Difference]: Without dead ends: 1355 [2020-11-06 22:27:02,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:27:02,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2020-11-06 22:27:02,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 1354. [2020-11-06 22:27:02,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1354 states. [2020-11-06 22:27:02,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1354 states to 1354 states and 1672 transitions. [2020-11-06 22:27:02,235 INFO L78 Accepts]: Start accepts. Automaton has 1354 states and 1672 transitions. Word has length 25 [2020-11-06 22:27:02,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:27:02,235 INFO L481 AbstractCegarLoop]: Abstraction has 1354 states and 1672 transitions. [2020-11-06 22:27:02,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:27:02,235 INFO L276 IsEmpty]: Start isEmpty. Operand 1354 states and 1672 transitions. [2020-11-06 22:27:02,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-06 22:27:02,238 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:27:02,238 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] [2020-11-06 22:27:02,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-11-06 22:27:02,238 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:27:02,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:27:02,239 INFO L82 PathProgramCache]: Analyzing trace with hash -2116438433, now seen corresponding path program 1 times [2020-11-06 22:27:02,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:27:02,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523608590] [2020-11-06 22:27:02,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:27:02,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:27:02,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:27:02,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:27:02,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:27:02,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523608590] [2020-11-06 22:27:02,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:27:02,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:27:02,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604886961] [2020-11-06 22:27:02,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:27:02,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:27:02,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:27:02,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:27:02,337 INFO L87 Difference]: Start difference. First operand 1354 states and 1672 transitions. Second operand 4 states. [2020-11-06 22:27:02,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:27:02,602 INFO L93 Difference]: Finished difference Result 2189 states and 2666 transitions. [2020-11-06 22:27:02,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:27:02,603 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-11-06 22:27:02,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:27:02,613 INFO L225 Difference]: With dead ends: 2189 [2020-11-06 22:27:02,614 INFO L226 Difference]: Without dead ends: 2186 [2020-11-06 22:27:02,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:27:02,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2186 states. [2020-11-06 22:27:02,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2186 to 2058. [2020-11-06 22:27:02,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2058 states. [2020-11-06 22:27:02,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2058 states to 2058 states and 2472 transitions. [2020-11-06 22:27:02,707 INFO L78 Accepts]: Start accepts. Automaton has 2058 states and 2472 transitions. Word has length 25 [2020-11-06 22:27:02,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:27:02,708 INFO L481 AbstractCegarLoop]: Abstraction has 2058 states and 2472 transitions. [2020-11-06 22:27:02,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:27:02,708 INFO L276 IsEmpty]: Start isEmpty. Operand 2058 states and 2472 transitions. [2020-11-06 22:27:02,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-06 22:27:02,712 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:27:02,713 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] [2020-11-06 22:27:02,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-11-06 22:27:02,713 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:27:02,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:27:02,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1415373855, now seen corresponding path program 1 times [2020-11-06 22:27:02,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:27:02,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380458420] [2020-11-06 22:27:02,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:27:02,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:27:02,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:27:02,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:27:02,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:27:02,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380458420] [2020-11-06 22:27:02,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:27:02,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:27:02,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501638147] [2020-11-06 22:27:02,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:27:02,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:27:02,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:27:02,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:27:02,811 INFO L87 Difference]: Start difference. First operand 2058 states and 2472 transitions. Second operand 4 states. [2020-11-06 22:27:03,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:27:03,100 INFO L93 Difference]: Finished difference Result 4554 states and 5352 transitions. [2020-11-06 22:27:03,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:27:03,101 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-11-06 22:27:03,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:27:03,102 INFO L225 Difference]: With dead ends: 4554 [2020-11-06 22:27:03,102 INFO L226 Difference]: Without dead ends: 0 [2020-11-06 22:27:03,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:27:03,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-06 22:27:03,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-06 22:27:03,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-06 22:27:03,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-06 22:27:03,113 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2020-11-06 22:27:03,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:27:03,113 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-06 22:27:03,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:27:03,114 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-06 22:27:03,114 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-06 22:27:03,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-11-06 22:27:03,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-06 22:27:05,677 WARN L194 SmtUtils]: Spent 2.51 s on a formula simplification. DAG size of input: 576 DAG size of output: 32 [2020-11-06 22:27:05,756 INFO L266 CegarLoopResult]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2020-11-06 22:27:05,756 INFO L269 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-11-06 22:27:05,756 INFO L266 CegarLoopResult]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2020-11-06 22:27:05,756 INFO L266 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-11-06 22:27:05,756 INFO L266 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-11-06 22:27:05,758 INFO L262 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-11-06 22:27:05,758 INFO L266 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-11-06 22:27:05,759 INFO L266 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-06 22:27:05,759 INFO L269 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-11-06 22:27:05,759 INFO L269 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-11-06 22:27:05,759 INFO L266 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-06 22:27:05,759 INFO L266 CegarLoopResult]: For program point L93-1(lines 32 118) no Hoare annotation was computed. [2020-11-06 22:27:05,759 INFO L266 CegarLoopResult]: For program point mainEXIT(lines 6 123) no Hoare annotation was computed. [2020-11-06 22:27:05,759 INFO L266 CegarLoopResult]: For program point L77-1(lines 32 118) no Hoare annotation was computed. [2020-11-06 22:27:05,760 INFO L266 CegarLoopResult]: For program point L69-1(lines 32 118) no Hoare annotation was computed. [2020-11-06 22:27:05,760 INFO L266 CegarLoopResult]: For program point L94(line 94) no Hoare annotation was computed. [2020-11-06 22:27:05,760 INFO L266 CegarLoopResult]: For program point L61-1(lines 32 118) no Hoare annotation was computed. [2020-11-06 22:27:05,761 INFO L269 CegarLoopResult]: At program point L119(lines 7 123) the Hoare annotation is: true [2020-11-06 22:27:05,761 INFO L266 CegarLoopResult]: For program point L53(lines 53 55) no Hoare annotation was computed. [2020-11-06 22:27:05,761 INFO L266 CegarLoopResult]: For program point L53-2(lines 32 118) no Hoare annotation was computed. [2020-11-06 22:27:05,761 INFO L266 CegarLoopResult]: For program point L103-1(lines 32 118) no Hoare annotation was computed. [2020-11-06 22:27:05,761 INFO L266 CegarLoopResult]: For program point mainFINAL(lines 6 123) no Hoare annotation was computed. [2020-11-06 22:27:05,761 INFO L266 CegarLoopResult]: For program point L104(line 104) no Hoare annotation was computed. [2020-11-06 22:27:05,762 INFO L269 CegarLoopResult]: At program point mainENTRY(lines 6 123) the Hoare annotation is: true [2020-11-06 22:27:05,763 INFO L266 CegarLoopResult]: For program point L121(line 121) no Hoare annotation was computed. [2020-11-06 22:27:05,763 INFO L266 CegarLoopResult]: For program point L88-1(lines 32 118) no Hoare annotation was computed. [2020-11-06 22:27:05,763 INFO L269 CegarLoopResult]: At program point L113-1(lines 32 118) the Hoare annotation is: true [2020-11-06 22:27:05,763 INFO L266 CegarLoopResult]: For program point L89(line 89) no Hoare annotation was computed. [2020-11-06 22:27:05,763 INFO L266 CegarLoopResult]: For program point L114(line 114) no Hoare annotation was computed. [2020-11-06 22:27:05,763 INFO L262 CegarLoopResult]: At program point L114-1(lines 7 123) the Hoare annotation is: false [2020-11-06 22:27:05,764 INFO L266 CegarLoopResult]: For program point L73-1(lines 32 118) no Hoare annotation was computed. [2020-11-06 22:27:05,764 INFO L266 CegarLoopResult]: For program point L98-1(lines 32 118) no Hoare annotation was computed. [2020-11-06 22:27:05,764 INFO L266 CegarLoopResult]: For program point L65-1(lines 32 118) no Hoare annotation was computed. [2020-11-06 22:27:05,764 INFO L266 CegarLoopResult]: For program point L57-1(lines 32 118) no Hoare annotation was computed. [2020-11-06 22:27:05,764 INFO L266 CegarLoopResult]: For program point L99(line 99) no Hoare annotation was computed. [2020-11-06 22:27:05,764 INFO L266 CegarLoopResult]: For program point L83-1(lines 32 118) no Hoare annotation was computed. [2020-11-06 22:27:05,764 INFO L266 CegarLoopResult]: For program point L108-1(lines 32 118) no Hoare annotation was computed. [2020-11-06 22:27:05,764 INFO L266 CegarLoopResult]: For program point L34(lines 34 36) no Hoare annotation was computed. [2020-11-06 22:27:05,765 INFO L266 CegarLoopResult]: For program point L84(line 84) no Hoare annotation was computed. [2020-11-06 22:27:05,765 INFO L266 CegarLoopResult]: For program point L109(line 109) no Hoare annotation was computed. [2020-11-06 22:27:05,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:27:05 BoogieIcfgContainer [2020-11-06 22:27:05,782 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:27:05,788 INFO L168 Benchmark]: Toolchain (without parser) took 12492.45 ms. Allocated memory was 151.0 MB in the beginning and 276.8 MB in the end (delta: 125.8 MB). Free memory was 126.5 MB in the beginning and 232.0 MB in the end (delta: -105.5 MB). Peak memory consumption was 157.9 MB. Max. memory is 8.0 GB. [2020-11-06 22:27:05,793 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 151.0 MB. Free memory is still 123.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:27:05,794 INFO L168 Benchmark]: CACSL2BoogieTranslator took 324.87 ms. Allocated memory is still 151.0 MB. Free memory was 125.8 MB in the beginning and 116.0 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-11-06 22:27:05,798 INFO L168 Benchmark]: Boogie Preprocessor took 46.29 ms. Allocated memory is still 151.0 MB. Free memory was 115.8 MB in the beginning and 114.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-06 22:27:05,798 INFO L168 Benchmark]: RCFGBuilder took 894.73 ms. Allocated memory is still 151.0 MB. Free memory was 114.3 MB in the beginning and 129.3 MB in the end (delta: -15.0 MB). Peak memory consumption was 16.3 MB. Max. memory is 8.0 GB. [2020-11-06 22:27:05,799 INFO L168 Benchmark]: TraceAbstraction took 11208.59 ms. Allocated memory was 151.0 MB in the beginning and 276.8 MB in the end (delta: 125.8 MB). Free memory was 128.7 MB in the beginning and 232.0 MB in the end (delta: -103.3 MB). Peak memory consumption was 159.4 MB. Max. memory is 8.0 GB. [2020-11-06 22:27:05,806 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 151.0 MB. Free memory is still 123.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 324.87 ms. Allocated memory is still 151.0 MB. Free memory was 125.8 MB in the beginning and 116.0 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 46.29 ms. Allocated memory is still 151.0 MB. Free memory was 115.8 MB in the beginning and 114.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 894.73 ms. Allocated memory is still 151.0 MB. Free memory was 114.3 MB in the beginning and 129.3 MB in the end (delta: -15.0 MB). Peak memory consumption was 16.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 11208.59 ms. Allocated memory was 151.0 MB in the beginning and 276.8 MB in the end (delta: 125.8 MB). Free memory was 128.7 MB in the beginning and 232.0 MB in the end (delta: -103.3 MB). Peak memory consumption was 159.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 8.4s, OverallIterations: 19, TraceHistogramMax: 1, AutomataDifference: 5.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1205 SDtfs, 1671 SDslu, 148 SDs, 0 SdLazy, 868 SolverSat, 68 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 133 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2058occurred in iteration=18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 19 MinimizatonAttempts, 511 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 26 PreInvPairs, 157 NumberOfFragments, 38 HoareAnnotationTreeSize, 26 FomulaSimplifications, 854054 FormulaSimplificationTreeSizeReduction, 2.5s HoareSimplificationTime, 8 FomulaSimplificationsInter, 90 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 422 NumberOfCodeBlocks, 422 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 403 ConstructedInterpolants, 0 QuantifiedInterpolants, 27410 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 19 InterpolantComputations, 19 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...