/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 13:02:36,674 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 13:02:36,679 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 13:02:36,695 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 13:02:36,696 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 13:02:36,698 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 13:02:36,699 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 13:02:36,709 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 13:02:36,711 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 13:02:36,712 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 13:02:36,715 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 13:02:36,717 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 13:02:36,717 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 13:02:36,719 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 13:02:36,722 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 13:02:36,723 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 13:02:36,724 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 13:02:36,726 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 13:02:36,727 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 13:02:36,733 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 13:02:36,737 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 13:02:36,740 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 13:02:36,741 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 13:02:36,742 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 13:02:36,745 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 13:02:36,756 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 13:02:36,757 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 13:02:36,758 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 13:02:36,759 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-07 13:02:36,785 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 13:02:36,785 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 13:02:36,788 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 13:02:36,788 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 13:02:36,788 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 13:02:36,788 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 13:02:36,790 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 13:02:36,791 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 13:02:36,791 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 13:02:36,791 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 13:02:36,791 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 13:02:36,791 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 13:02:36,791 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 13:02:36,792 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 13:02:36,792 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 13:02:36,792 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-07 13:02:36,792 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 13:02:36,792 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 13:02:36,794 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 13:02:36,794 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 13:02:36,794 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-07 13:02:36,795 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 13:02:36,795 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-07 13:02:37,118 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 13:02:37,131 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 13:02:37,135 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 13:02:37,136 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 13:02:37,136 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 13:02:37,137 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c [2020-07-07 13:02:37,195 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30d7e9cf7/3fd8396db58e4f6db5c0b4892c747d06/FLAG158f095f8 [2020-07-07 13:02:37,670 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 13:02:37,670 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c [2020-07-07 13:02:37,681 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30d7e9cf7/3fd8396db58e4f6db5c0b4892c747d06/FLAG158f095f8 [2020-07-07 13:02:38,020 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30d7e9cf7/3fd8396db58e4f6db5c0b4892c747d06 [2020-07-07 13:02:38,030 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 13:02:38,032 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 13:02:38,033 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 13:02:38,033 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 13:02:38,038 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 13:02:38,039 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:02:38" (1/1) ... [2020-07-07 13:02:38,042 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36ec73f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:02:38, skipping insertion in model container [2020-07-07 13:02:38,042 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:02:38" (1/1) ... [2020-07-07 13:02:38,050 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 13:02:38,099 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 13:02:38,304 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:02:38,308 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 13:02:38,441 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:02:38,454 INFO L208 MainTranslator]: Completed translation [2020-07-07 13:02:38,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:02:38 WrapperNode [2020-07-07 13:02:38,455 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 13:02:38,455 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 13:02:38,455 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 13:02:38,456 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 13:02:38,465 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:02:38" (1/1) ... [2020-07-07 13:02:38,466 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:02:38" (1/1) ... [2020-07-07 13:02:38,472 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:02:38" (1/1) ... [2020-07-07 13:02:38,472 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:02:38" (1/1) ... [2020-07-07 13:02:38,481 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:02:38" (1/1) ... [2020-07-07 13:02:38,489 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:02:38" (1/1) ... [2020-07-07 13:02:38,491 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:02:38" (1/1) ... [2020-07-07 13:02:38,494 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 13:02:38,495 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 13:02:38,495 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 13:02:38,495 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 13:02:38,496 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:02:38" (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 [2020-07-07 13:02:38,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 13:02:38,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 13:02:38,560 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-07 13:02:38,560 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-07-07 13:02:38,560 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-07-07 13:02:38,560 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-07-07 13:02:38,560 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 13:02:38,560 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 13:02:38,561 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-07 13:02:38,561 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-07 13:02:38,561 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-07 13:02:38,562 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-07-07 13:02:38,562 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-07-07 13:02:38,562 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-07-07 13:02:38,562 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 13:02:38,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 13:02:38,563 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 13:02:39,120 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 13:02:39,120 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-07 13:02:39,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:02:39 BoogieIcfgContainer [2020-07-07 13:02:39,126 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 13:02:39,127 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 13:02:39,127 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 13:02:39,130 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 13:02:39,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 01:02:38" (1/3) ... [2020-07-07 13:02:39,132 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76b9d430 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:02:39, skipping insertion in model container [2020-07-07 13:02:39,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:02:38" (2/3) ... [2020-07-07 13:02:39,132 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76b9d430 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:02:39, skipping insertion in model container [2020-07-07 13:02:39,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:02:39" (3/3) ... [2020-07-07 13:02:39,134 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_2a.c.cil.c [2020-07-07 13:02:39,145 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-07 13:02:39,153 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 13:02:39,167 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 13:02:39,190 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 13:02:39,191 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 13:02:39,191 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-07 13:02:39,191 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 13:02:39,193 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 13:02:39,193 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 13:02:39,193 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 13:02:39,193 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 13:02:39,212 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states. [2020-07-07 13:02:39,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-07-07 13:02:39,230 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:02:39,231 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:02:39,232 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:02:39,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:02:39,238 INFO L82 PathProgramCache]: Analyzing trace with hash -2062280112, now seen corresponding path program 1 times [2020-07-07 13:02:39,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:02:39,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2132947118] [2020-07-07 13:02:39,247 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:02:39,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:39,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:39,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:39,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:39,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:39,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:39,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:39,635 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-07-07 13:02:39,636 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:02:39,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2132947118] [2020-07-07 13:02:39,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:02:39,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 13:02:39,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887023205] [2020-07-07 13:02:39,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 13:02:39,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:02:39,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 13:02:39,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 13:02:39,668 INFO L87 Difference]: Start difference. First operand 152 states. Second operand 4 states. [2020-07-07 13:02:39,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:02:39,866 INFO L93 Difference]: Finished difference Result 286 states and 363 transitions. [2020-07-07 13:02:39,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 13:02:39,869 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 100 [2020-07-07 13:02:39,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:02:39,883 INFO L225 Difference]: With dead ends: 286 [2020-07-07 13:02:39,883 INFO L226 Difference]: Without dead ends: 168 [2020-07-07 13:02:39,889 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-07 13:02:39,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-07-07 13:02:39,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 145. [2020-07-07 13:02:39,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-07-07 13:02:39,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 169 transitions. [2020-07-07 13:02:39,958 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 169 transitions. Word has length 100 [2020-07-07 13:02:39,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:02:39,959 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 169 transitions. [2020-07-07 13:02:39,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 13:02:39,959 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 169 transitions. [2020-07-07 13:02:39,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-07-07 13:02:39,964 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:02:39,965 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:02:39,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 13:02:39,965 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:02:39,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:02:39,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1947593625, now seen corresponding path program 1 times [2020-07-07 13:02:39,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:02:39,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [57013320] [2020-07-07 13:02:39,967 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:02:39,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:40,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:40,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:40,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:40,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:40,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:40,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:40,094 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-07 13:02:40,095 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:02:40,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [57013320] [2020-07-07 13:02:40,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:02:40,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 13:02:40,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339080129] [2020-07-07 13:02:40,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 13:02:40,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:02:40,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 13:02:40,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 13:02:40,098 INFO L87 Difference]: Start difference. First operand 145 states and 169 transitions. Second operand 4 states. [2020-07-07 13:02:40,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:02:40,189 INFO L93 Difference]: Finished difference Result 278 states and 331 transitions. [2020-07-07 13:02:40,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 13:02:40,190 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 103 [2020-07-07 13:02:40,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:02:40,193 INFO L225 Difference]: With dead ends: 278 [2020-07-07 13:02:40,193 INFO L226 Difference]: Without dead ends: 169 [2020-07-07 13:02:40,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-07 13:02:40,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-07-07 13:02:40,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 157. [2020-07-07 13:02:40,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-07-07 13:02:40,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 185 transitions. [2020-07-07 13:02:40,218 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 185 transitions. Word has length 103 [2020-07-07 13:02:40,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:02:40,219 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 185 transitions. [2020-07-07 13:02:40,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 13:02:40,219 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 185 transitions. [2020-07-07 13:02:40,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-07 13:02:40,224 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:02:40,225 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:02:40,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 13:02:40,225 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:02:40,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:02:40,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1622356113, now seen corresponding path program 1 times [2020-07-07 13:02:40,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:02:40,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1725846344] [2020-07-07 13:02:40,226 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:02:40,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:40,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:40,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:40,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:40,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:40,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:40,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:40,426 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-07 13:02:40,427 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:02:40,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1725846344] [2020-07-07 13:02:40,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:02:40,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 13:02:40,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564115373] [2020-07-07 13:02:40,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 13:02:40,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:02:40,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 13:02:40,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-07 13:02:40,438 INFO L87 Difference]: Start difference. First operand 157 states and 185 transitions. Second operand 5 states. [2020-07-07 13:02:40,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:02:40,572 INFO L93 Difference]: Finished difference Result 314 states and 375 transitions. [2020-07-07 13:02:40,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 13:02:40,574 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 108 [2020-07-07 13:02:40,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:02:40,577 INFO L225 Difference]: With dead ends: 314 [2020-07-07 13:02:40,577 INFO L226 Difference]: Without dead ends: 192 [2020-07-07 13:02:40,578 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-07-07 13:02:40,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-07-07 13:02:40,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 173. [2020-07-07 13:02:40,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-07-07 13:02:40,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 204 transitions. [2020-07-07 13:02:40,603 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 204 transitions. Word has length 108 [2020-07-07 13:02:40,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:02:40,604 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 204 transitions. [2020-07-07 13:02:40,604 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 13:02:40,604 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 204 transitions. [2020-07-07 13:02:40,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-07 13:02:40,608 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:02:40,608 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:02:40,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-07 13:02:40,609 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:02:40,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:02:40,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1409900093, now seen corresponding path program 1 times [2020-07-07 13:02:40,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:02:40,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [709419795] [2020-07-07 13:02:40,610 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:02:40,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:40,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:40,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:40,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:40,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:40,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:40,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:40,777 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-07-07 13:02:40,777 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:02:40,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [709419795] [2020-07-07 13:02:40,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:02:40,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 13:02:40,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632817430] [2020-07-07 13:02:40,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 13:02:40,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:02:40,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 13:02:40,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 13:02:40,780 INFO L87 Difference]: Start difference. First operand 173 states and 204 transitions. Second operand 3 states. [2020-07-07 13:02:40,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:02:40,796 INFO L93 Difference]: Finished difference Result 188 states and 221 transitions. [2020-07-07 13:02:40,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 13:02:40,796 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-07-07 13:02:40,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:02:40,799 INFO L225 Difference]: With dead ends: 188 [2020-07-07 13:02:40,799 INFO L226 Difference]: Without dead ends: 172 [2020-07-07 13:02:40,800 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 13:02:40,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-07-07 13:02:40,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2020-07-07 13:02:40,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-07-07 13:02:40,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 202 transitions. [2020-07-07 13:02:40,818 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 202 transitions. Word has length 108 [2020-07-07 13:02:40,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:02:40,819 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 202 transitions. [2020-07-07 13:02:40,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 13:02:40,819 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 202 transitions. [2020-07-07 13:02:40,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-07-07 13:02:40,821 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:02:40,821 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:02:40,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-07 13:02:40,822 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:02:40,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:02:40,822 INFO L82 PathProgramCache]: Analyzing trace with hash 2123404618, now seen corresponding path program 1 times [2020-07-07 13:02:40,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:02:40,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [390984172] [2020-07-07 13:02:40,823 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:02:40,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:40,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:40,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:40,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:40,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:40,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:40,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:40,898 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-07-07 13:02:40,899 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:02:40,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [390984172] [2020-07-07 13:02:40,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:02:40,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 13:02:40,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620803777] [2020-07-07 13:02:40,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 13:02:40,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:02:40,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 13:02:40,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 13:02:40,901 INFO L87 Difference]: Start difference. First operand 172 states and 202 transitions. Second operand 4 states. [2020-07-07 13:02:40,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:02:40,935 INFO L93 Difference]: Finished difference Result 188 states and 220 transitions. [2020-07-07 13:02:40,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 13:02:40,936 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 110 [2020-07-07 13:02:40,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:02:40,938 INFO L225 Difference]: With dead ends: 188 [2020-07-07 13:02:40,938 INFO L226 Difference]: Without dead ends: 171 [2020-07-07 13:02:40,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-07 13:02:40,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-07-07 13:02:40,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2020-07-07 13:02:40,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-07-07 13:02:40,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 200 transitions. [2020-07-07 13:02:40,952 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 200 transitions. Word has length 110 [2020-07-07 13:02:40,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:02:40,953 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 200 transitions. [2020-07-07 13:02:40,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 13:02:40,953 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 200 transitions. [2020-07-07 13:02:40,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-07-07 13:02:40,955 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:02:40,955 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:02:40,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-07 13:02:40,955 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:02:40,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:02:40,956 INFO L82 PathProgramCache]: Analyzing trace with hash -856467222, now seen corresponding path program 1 times [2020-07-07 13:02:40,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:02:40,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [723850033] [2020-07-07 13:02:40,957 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:02:40,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:40,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:41,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:41,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:41,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:41,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:41,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:41,090 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-07-07 13:02:41,090 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:02:41,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [723850033] [2020-07-07 13:02:41,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:02:41,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 13:02:41,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372656572] [2020-07-07 13:02:41,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 13:02:41,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:02:41,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 13:02:41,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-07 13:02:41,092 INFO L87 Difference]: Start difference. First operand 171 states and 200 transitions. Second operand 5 states. [2020-07-07 13:02:41,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:02:41,192 INFO L93 Difference]: Finished difference Result 310 states and 367 transitions. [2020-07-07 13:02:41,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 13:02:41,193 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 110 [2020-07-07 13:02:41,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:02:41,195 INFO L225 Difference]: With dead ends: 310 [2020-07-07 13:02:41,196 INFO L226 Difference]: Without dead ends: 192 [2020-07-07 13:02:41,197 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-07-07 13:02:41,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-07-07 13:02:41,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 174. [2020-07-07 13:02:41,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-07-07 13:02:41,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 203 transitions. [2020-07-07 13:02:41,225 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 203 transitions. Word has length 110 [2020-07-07 13:02:41,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:02:41,225 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 203 transitions. [2020-07-07 13:02:41,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 13:02:41,226 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 203 transitions. [2020-07-07 13:02:41,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-07-07 13:02:41,227 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:02:41,227 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:02:41,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-07 13:02:41,228 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:02:41,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:02:41,228 INFO L82 PathProgramCache]: Analyzing trace with hash -812048320, now seen corresponding path program 1 times [2020-07-07 13:02:41,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:02:41,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [442393471] [2020-07-07 13:02:41,229 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:02:41,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:41,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:41,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:41,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:41,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:41,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:41,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:41,344 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-07 13:02:41,345 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:02:41,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [442393471] [2020-07-07 13:02:41,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:02:41,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-07 13:02:41,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212192966] [2020-07-07 13:02:41,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 13:02:41,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:02:41,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 13:02:41,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-07-07 13:02:41,347 INFO L87 Difference]: Start difference. First operand 174 states and 203 transitions. Second operand 6 states. [2020-07-07 13:02:41,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:02:41,453 INFO L93 Difference]: Finished difference Result 344 states and 408 transitions. [2020-07-07 13:02:41,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 13:02:41,454 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 115 [2020-07-07 13:02:41,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:02:41,456 INFO L225 Difference]: With dead ends: 344 [2020-07-07 13:02:41,456 INFO L226 Difference]: Without dead ends: 216 [2020-07-07 13:02:41,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-07-07 13:02:41,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-07-07 13:02:41,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 184. [2020-07-07 13:02:41,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-07-07 13:02:41,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 216 transitions. [2020-07-07 13:02:41,475 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 216 transitions. Word has length 115 [2020-07-07 13:02:41,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:02:41,476 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 216 transitions. [2020-07-07 13:02:41,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 13:02:41,476 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 216 transitions. [2020-07-07 13:02:41,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-07-07 13:02:41,478 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:02:41,478 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:02:41,478 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-07 13:02:41,478 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:02:41,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:02:41,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1472531698, now seen corresponding path program 1 times [2020-07-07 13:02:41,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:02:41,479 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1979509923] [2020-07-07 13:02:41,479 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:02:41,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:41,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:41,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:41,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:41,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:41,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:41,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:41,613 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-07-07 13:02:41,613 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:02:41,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1979509923] [2020-07-07 13:02:41,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:02:41,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-07 13:02:41,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979891929] [2020-07-07 13:02:41,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 13:02:41,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:02:41,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 13:02:41,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-07-07 13:02:41,616 INFO L87 Difference]: Start difference. First operand 184 states and 216 transitions. Second operand 6 states. [2020-07-07 13:02:41,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:02:41,757 INFO L93 Difference]: Finished difference Result 338 states and 402 transitions. [2020-07-07 13:02:41,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 13:02:41,758 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 115 [2020-07-07 13:02:41,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:02:41,760 INFO L225 Difference]: With dead ends: 338 [2020-07-07 13:02:41,760 INFO L226 Difference]: Without dead ends: 212 [2020-07-07 13:02:41,761 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-07-07 13:02:41,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-07-07 13:02:41,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 184. [2020-07-07 13:02:41,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-07-07 13:02:41,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 216 transitions. [2020-07-07 13:02:41,782 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 216 transitions. Word has length 115 [2020-07-07 13:02:41,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:02:41,783 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 216 transitions. [2020-07-07 13:02:41,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 13:02:41,783 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 216 transitions. [2020-07-07 13:02:41,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-07-07 13:02:41,785 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:02:41,785 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:02:41,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-07 13:02:41,786 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:02:41,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:02:41,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1788956360, now seen corresponding path program 2 times [2020-07-07 13:02:41,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:02:41,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [140823217] [2020-07-07 13:02:41,787 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:02:41,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:41,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:41,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:41,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:41,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:41,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:41,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:41,900 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-07 13:02:41,900 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:02:41,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [140823217] [2020-07-07 13:02:41,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:02:41,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-07 13:02:41,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128183795] [2020-07-07 13:02:41,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 13:02:41,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:02:41,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 13:02:41,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-07-07 13:02:41,903 INFO L87 Difference]: Start difference. First operand 184 states and 216 transitions. Second operand 7 states. [2020-07-07 13:02:42,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:02:42,039 INFO L93 Difference]: Finished difference Result 371 states and 441 transitions. [2020-07-07 13:02:42,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-07 13:02:42,039 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 120 [2020-07-07 13:02:42,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:02:42,041 INFO L225 Difference]: With dead ends: 371 [2020-07-07 13:02:42,042 INFO L226 Difference]: Without dead ends: 238 [2020-07-07 13:02:42,043 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-07-07 13:02:42,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-07-07 13:02:42,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 194. [2020-07-07 13:02:42,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-07-07 13:02:42,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 229 transitions. [2020-07-07 13:02:42,074 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 229 transitions. Word has length 120 [2020-07-07 13:02:42,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:02:42,074 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 229 transitions. [2020-07-07 13:02:42,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 13:02:42,075 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 229 transitions. [2020-07-07 13:02:42,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-07-07 13:02:42,076 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:02:42,077 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:02:42,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-07 13:02:42,077 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:02:42,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:02:42,077 INFO L82 PathProgramCache]: Analyzing trace with hash 495623658, now seen corresponding path program 2 times [2020-07-07 13:02:42,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:02:42,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1802298370] [2020-07-07 13:02:42,078 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:02:42,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:42,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:42,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:42,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:42,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:42,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:42,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:42,242 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-07-07 13:02:42,242 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:02:42,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1802298370] [2020-07-07 13:02:42,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:02:42,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-07 13:02:42,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116428546] [2020-07-07 13:02:42,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 13:02:42,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:02:42,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 13:02:42,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-07 13:02:42,245 INFO L87 Difference]: Start difference. First operand 194 states and 229 transitions. Second operand 7 states. [2020-07-07 13:02:42,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:02:42,474 INFO L93 Difference]: Finished difference Result 357 states and 427 transitions. [2020-07-07 13:02:42,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-07 13:02:42,475 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 120 [2020-07-07 13:02:42,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:02:42,476 INFO L225 Difference]: With dead ends: 357 [2020-07-07 13:02:42,477 INFO L226 Difference]: Without dead ends: 226 [2020-07-07 13:02:42,478 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-07-07 13:02:42,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-07-07 13:02:42,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 194. [2020-07-07 13:02:42,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-07-07 13:02:42,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 229 transitions. [2020-07-07 13:02:42,560 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 229 transitions. Word has length 120 [2020-07-07 13:02:42,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:02:42,561 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 229 transitions. [2020-07-07 13:02:42,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 13:02:42,561 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 229 transitions. [2020-07-07 13:02:42,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-07-07 13:02:42,563 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:02:42,563 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:02:42,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-07 13:02:42,564 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:02:42,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:02:42,564 INFO L82 PathProgramCache]: Analyzing trace with hash 63241024, now seen corresponding path program 3 times [2020-07-07 13:02:42,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:02:42,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1946464102] [2020-07-07 13:02:42,565 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:02:42,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:42,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:42,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:42,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:42,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:42,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:42,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:42,682 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-07 13:02:42,683 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:02:42,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1946464102] [2020-07-07 13:02:42,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:02:42,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-07 13:02:42,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167824650] [2020-07-07 13:02:42,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-07 13:02:42,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:02:42,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-07 13:02:42,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-07-07 13:02:42,685 INFO L87 Difference]: Start difference. First operand 194 states and 229 transitions. Second operand 8 states. [2020-07-07 13:02:43,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:02:43,168 INFO L93 Difference]: Finished difference Result 398 states and 474 transitions. [2020-07-07 13:02:43,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-07 13:02:43,169 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 125 [2020-07-07 13:02:43,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:02:43,171 INFO L225 Difference]: With dead ends: 398 [2020-07-07 13:02:43,171 INFO L226 Difference]: Without dead ends: 260 [2020-07-07 13:02:43,173 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2020-07-07 13:02:43,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-07-07 13:02:43,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 204. [2020-07-07 13:02:43,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-07-07 13:02:43,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 242 transitions. [2020-07-07 13:02:43,571 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 242 transitions. Word has length 125 [2020-07-07 13:02:43,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:02:43,572 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 242 transitions. [2020-07-07 13:02:43,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-07 13:02:43,572 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 242 transitions. [2020-07-07 13:02:43,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-07-07 13:02:43,574 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:02:43,574 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:02:43,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-07 13:02:43,575 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:02:43,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:02:43,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1947146254, now seen corresponding path program 3 times [2020-07-07 13:02:43,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:02:43,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1715908249] [2020-07-07 13:02:43,576 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:02:43,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:43,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:43,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:43,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:43,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:43,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:43,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:43,801 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-07-07 13:02:43,801 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:02:43,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1715908249] [2020-07-07 13:02:43,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:02:43,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-07 13:02:43,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070078751] [2020-07-07 13:02:43,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-07 13:02:43,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:02:43,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-07 13:02:43,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-07-07 13:02:43,803 INFO L87 Difference]: Start difference. First operand 204 states and 242 transitions. Second operand 8 states. [2020-07-07 13:02:46,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:02:46,001 INFO L93 Difference]: Finished difference Result 376 states and 452 transitions. [2020-07-07 13:02:46,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-07 13:02:46,004 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 125 [2020-07-07 13:02:46,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:02:46,006 INFO L225 Difference]: With dead ends: 376 [2020-07-07 13:02:46,007 INFO L226 Difference]: Without dead ends: 240 [2020-07-07 13:02:46,008 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-07-07 13:02:46,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-07-07 13:02:49,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 204. [2020-07-07 13:02:49,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-07-07 13:02:49,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 242 transitions. [2020-07-07 13:02:49,259 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 242 transitions. Word has length 125 [2020-07-07 13:02:49,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:02:49,260 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 242 transitions. [2020-07-07 13:02:49,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-07 13:02:49,260 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 242 transitions. [2020-07-07 13:02:49,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-07-07 13:02:49,262 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:02:49,262 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:02:49,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-07 13:02:49,263 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:02:49,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:02:49,263 INFO L82 PathProgramCache]: Analyzing trace with hash -110905800, now seen corresponding path program 4 times [2020-07-07 13:02:49,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:02:49,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [97801084] [2020-07-07 13:02:49,264 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:02:49,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:49,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:49,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:49,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:49,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:49,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:49,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:49,428 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-07 13:02:49,428 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:02:49,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [97801084] [2020-07-07 13:02:49,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:02:49,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-07 13:02:49,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428289107] [2020-07-07 13:02:49,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-07 13:02:49,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:02:49,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-07 13:02:49,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2020-07-07 13:02:49,431 INFO L87 Difference]: Start difference. First operand 204 states and 242 transitions. Second operand 9 states. [2020-07-07 13:03:05,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:03:05,494 INFO L93 Difference]: Finished difference Result 425 states and 507 transitions. [2020-07-07 13:03:05,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-07 13:03:05,496 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-07-07 13:03:05,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:03:05,498 INFO L225 Difference]: With dead ends: 425 [2020-07-07 13:03:05,498 INFO L226 Difference]: Without dead ends: 282 [2020-07-07 13:03:05,499 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2020-07-07 13:03:05,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-07-07 13:03:20,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 214. [2020-07-07 13:03:20,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-07-07 13:03:20,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 255 transitions. [2020-07-07 13:03:20,297 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 255 transitions. Word has length 130 [2020-07-07 13:03:20,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:03:20,297 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 255 transitions. [2020-07-07 13:03:20,297 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-07 13:03:20,298 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 255 transitions. [2020-07-07 13:03:20,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-07-07 13:03:20,300 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:03:20,300 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:03:20,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-07 13:03:20,301 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:03:20,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:03:20,301 INFO L82 PathProgramCache]: Analyzing trace with hash -2121293078, now seen corresponding path program 4 times [2020-07-07 13:03:20,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:03:20,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1644268878] [2020-07-07 13:03:20,309 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:03:20,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:20,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:20,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:20,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:20,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:20,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:20,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:20,556 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-07-07 13:03:20,557 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:03:20,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1644268878] [2020-07-07 13:03:20,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:03:20,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-07 13:03:20,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022312112] [2020-07-07 13:03:20,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-07 13:03:20,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:03:20,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-07 13:03:20,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-07-07 13:03:20,560 INFO L87 Difference]: Start difference. First operand 214 states and 255 transitions. Second operand 9 states. [2020-07-07 13:07:07,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:07:07,869 INFO L93 Difference]: Finished difference Result 395 states and 477 transitions. [2020-07-07 13:07:07,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-07 13:07:07,869 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-07-07 13:07:07,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:07:07,874 INFO L225 Difference]: With dead ends: 395 [2020-07-07 13:07:07,874 INFO L226 Difference]: Without dead ends: 254 [2020-07-07 13:07:07,875 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-07-07 13:07:07,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states.