/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_2-1-simple.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 12:04:19,642 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 12:04:19,643 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 12:04:19,670 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 12:04:19,702 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 [2021-05-02 12:04:19,737 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 12:04:19,738 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 12:04:19,739 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 12:04:19,739 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 12:04:19,739 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 12:04:19,739 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 12:04:19,740 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 12:04:19,740 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 12:04:19,740 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 12:04:19,740 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 12:04:19,740 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 12:04:19,740 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 12:04:19,740 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 12:04:19,740 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 12:04:19,741 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 12:04:19,741 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 12:04:19,741 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 12:04:19,741 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 12:04:19,741 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 12:04:19,741 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 12:04:19,741 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 12:04:19,742 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 12:04:19,742 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 12:04:19,742 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 12:04:19,742 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 12:04:19,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 12:04:19,742 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 12:04:19,742 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 12:04:19,742 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 12:04:19,990 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 12:04:20,011 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 12:04:20,014 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 12:04:20,014 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 12:04:20,015 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 12:04:20,016 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_2-1-simple.i [2021-05-02 12:04:20,062 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/915b26b5c/1ab7fa1c534241c18592b7eb891d59c4/FLAG8c0ce8e86 [2021-05-02 12:04:20,427 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 12:04:20,428 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_2-1-simple.i [2021-05-02 12:04:20,432 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/915b26b5c/1ab7fa1c534241c18592b7eb891d59c4/FLAG8c0ce8e86 [2021-05-02 12:04:20,446 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/915b26b5c/1ab7fa1c534241c18592b7eb891d59c4 [2021-05-02 12:04:20,448 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 12:04:20,449 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 12:04:20,450 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 12:04:20,450 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 12:04:20,453 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 12:04:20,453 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 12:04:20" (1/1) ... [2021-05-02 12:04:20,454 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69006fef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:04:20, skipping insertion in model container [2021-05-02 12:04:20,454 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 12:04:20" (1/1) ... [2021-05-02 12:04:20,459 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 12:04:20,468 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 12:04:20,552 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_2-1-simple.i[809,822] [2021-05-02 12:04:20,566 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 12:04:20,575 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 12:04:20,583 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_2-1-simple.i[809,822] [2021-05-02 12:04:20,587 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 12:04:20,596 INFO L208 MainTranslator]: Completed translation [2021-05-02 12:04:20,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:04:20 WrapperNode [2021-05-02 12:04:20,596 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 12:04:20,597 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 12:04:20,597 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 12:04:20,597 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 12:04:20,604 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:04:20" (1/1) ... [2021-05-02 12:04:20,604 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:04:20" (1/1) ... [2021-05-02 12:04:20,617 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:04:20" (1/1) ... [2021-05-02 12:04:20,618 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:04:20" (1/1) ... [2021-05-02 12:04:20,621 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:04:20" (1/1) ... [2021-05-02 12:04:20,623 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:04:20" (1/1) ... [2021-05-02 12:04:20,624 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:04:20" (1/1) ... [2021-05-02 12:04:20,625 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 12:04:20,626 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 12:04:20,626 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 12:04:20,626 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 12:04:20,641 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:04:20" (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 [2021-05-02 12:04:20,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 12:04:20,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 12:04:20,703 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 12:04:20,703 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 12:04:20,703 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 12:04:20,703 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 12:04:20,703 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 12:04:20,704 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 12:04:20,704 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 12:04:20,704 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 12:04:20,704 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 12:04:20,704 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 12:04:20,705 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 12:04:20,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-05-02 12:04:20,705 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 12:04:20,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 12:04:20,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 12:04:20,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 12:04:20,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 12:04:20,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 12:04:20,943 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 12:04:20,943 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 12:04:20,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 12:04:20 BoogieIcfgContainer [2021-05-02 12:04:20,944 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 12:04:20,945 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 12:04:20,945 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 12:04:20,947 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 12:04:20,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 12:04:20" (1/3) ... [2021-05-02 12:04:20,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@697c1ace and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 12:04:20, skipping insertion in model container [2021-05-02 12:04:20,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:04:20" (2/3) ... [2021-05-02 12:04:20,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@697c1ace and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 12:04:20, skipping insertion in model container [2021-05-02 12:04:20,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 12:04:20" (3/3) ... [2021-05-02 12:04:20,949 INFO L111 eAbstractionObserver]: Analyzing ICFG array_2-1-simple.i [2021-05-02 12:04:20,959 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 12:04:20,961 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 12:04:20,972 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 12:04:20,987 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 12:04:20,987 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 12:04:20,987 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 12:04:20,987 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 12:04:20,987 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 12:04:20,987 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 12:04:20,988 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 12:04:20,988 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 12:04:20,997 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 12:04:21,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 12:04:21,000 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:21,001 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:21,001 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:21,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:21,004 INFO L82 PathProgramCache]: Analyzing trace with hash -445681932, now seen corresponding path program 1 times [2021-05-02 12:04:21,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:21,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915096144] [2021-05-02 12:04:21,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:21,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:21,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:21,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:21,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:21,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:21,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915096144] [2021-05-02 12:04:21,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915096144] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 12:04:21,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 12:04:21,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 12:04:21,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777957223] [2021-05-02 12:04:21,219 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 12:04:21,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:21,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 12:04:21,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 12:04:21,232 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:21,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:21,281 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-05-02 12:04:21,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 12:04:21,283 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 12:04:21,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:21,287 INFO L225 Difference]: With dead ends: 34 [2021-05-02 12:04:21,287 INFO L226 Difference]: Without dead ends: 14 [2021-05-02 12:04:21,290 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 12:04:21,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-05-02 12:04:21,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-05-02 12:04:21,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:21,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-05-02 12:04:21,314 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2021-05-02 12:04:21,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:21,315 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-05-02 12:04:21,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:21,315 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-05-02 12:04:21,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 12:04:21,315 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:21,316 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:21,316 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 12:04:21,316 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:21,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:21,317 INFO L82 PathProgramCache]: Analyzing trace with hash -617456838, now seen corresponding path program 1 times [2021-05-02 12:04:21,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:21,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628581100] [2021-05-02 12:04:21,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:21,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:21,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:21,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:21,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:21,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:21,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628581100] [2021-05-02 12:04:21,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628581100] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 12:04:21,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 12:04:21,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 12:04:21,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280058093] [2021-05-02 12:04:21,414 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 12:04:21,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:21,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 12:04:21,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 12:04:21,415 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:21,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:21,460 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2021-05-02 12:04:21,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 12:04:21,461 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 12:04:21,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:21,461 INFO L225 Difference]: With dead ends: 22 [2021-05-02 12:04:21,461 INFO L226 Difference]: Without dead ends: 16 [2021-05-02 12:04:21,462 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 12:04:21,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-05-02 12:04:21,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2021-05-02 12:04:21,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:21,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-05-02 12:04:21,465 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2021-05-02 12:04:21,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:21,465 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-05-02 12:04:21,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:21,466 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-05-02 12:04:21,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-02 12:04:21,466 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:21,466 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:21,466 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 12:04:21,466 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:21,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:21,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1544621860, now seen corresponding path program 1 times [2021-05-02 12:04:21,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:21,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323931617] [2021-05-02 12:04:21,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:21,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:21,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:21,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:21,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:21,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:21,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323931617] [2021-05-02 12:04:21,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323931617] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:21,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806500732] [2021-05-02 12:04:21,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:21,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:21,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-02 12:04:21,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:21,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:21,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:21,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:21,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806500732] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:21,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:21,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-05-02 12:04:21,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145345218] [2021-05-02 12:04:21,614 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 12:04:21,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:21,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 12:04:21,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 12:04:21,615 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:21,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:21,657 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2021-05-02 12:04:21,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 12:04:21,657 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-05-02 12:04:21,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:21,658 INFO L225 Difference]: With dead ends: 24 [2021-05-02 12:04:21,658 INFO L226 Difference]: Without dead ends: 18 [2021-05-02 12:04:21,659 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 21.4ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 12:04:21,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-02 12:04:21,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-05-02 12:04:21,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:21,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-05-02 12:04:21,668 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2021-05-02 12:04:21,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:21,668 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-05-02 12:04:21,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:21,669 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-05-02 12:04:21,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-02 12:04:21,669 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:21,669 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:21,885 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 12:04:21,885 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:21,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:21,887 INFO L82 PathProgramCache]: Analyzing trace with hash 802989566, now seen corresponding path program 2 times [2021-05-02 12:04:21,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:21,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066214438] [2021-05-02 12:04:21,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:21,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:21,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:21,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:21,968 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:21,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:21,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066214438] [2021-05-02 12:04:21,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066214438] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:21,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450884699] [2021-05-02 12:04:21,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:22,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 12:04:22,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:22,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 12:04:22,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:22,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:22,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:22,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:22,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:22,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:22,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450884699] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:22,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:22,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-05-02 12:04:22,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333890952] [2021-05-02 12:04:22,080 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 12:04:22,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:22,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 12:04:22,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 12:04:22,081 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:22,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:22,110 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-05-02 12:04:22,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 12:04:22,110 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-05-02 12:04:22,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:22,111 INFO L225 Difference]: With dead ends: 26 [2021-05-02 12:04:22,111 INFO L226 Difference]: Without dead ends: 20 [2021-05-02 12:04:22,111 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 26.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 12:04:22,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-02 12:04:22,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-05-02 12:04:22,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:22,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2021-05-02 12:04:22,114 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2021-05-02 12:04:22,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:22,114 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2021-05-02 12:04:22,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:22,114 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2021-05-02 12:04:22,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 12:04:22,115 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:22,115 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:22,333 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:22,333 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:22,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:22,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1999739552, now seen corresponding path program 3 times [2021-05-02 12:04:22,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:22,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154240143] [2021-05-02 12:04:22,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:22,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:22,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:22,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:22,401 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:22,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:22,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154240143] [2021-05-02 12:04:22,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154240143] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:22,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638274704] [2021-05-02 12:04:22,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:22,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 12:04:22,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:22,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 12:04:22,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:22,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:22,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:22,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:22,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:22,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:22,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:22,570 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:22,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638274704] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:22,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:22,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-05-02 12:04:22,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756073050] [2021-05-02 12:04:22,572 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 12:04:22,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:22,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 12:04:22,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 12:04:22,578 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:22,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:22,635 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2021-05-02 12:04:22,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 12:04:22,635 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-05-02 12:04:22,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:22,635 INFO L225 Difference]: With dead ends: 28 [2021-05-02 12:04:22,636 INFO L226 Difference]: Without dead ends: 22 [2021-05-02 12:04:22,636 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 30.7ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 12:04:22,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-02 12:04:22,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-05-02 12:04:22,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:22,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2021-05-02 12:04:22,638 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2021-05-02 12:04:22,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:22,639 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2021-05-02 12:04:22,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:22,639 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2021-05-02 12:04:22,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 12:04:22,639 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:22,639 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:22,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:22,840 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:22,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:22,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1025240770, now seen corresponding path program 4 times [2021-05-02 12:04:22,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:22,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086868139] [2021-05-02 12:04:22,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:22,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:22,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:22,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:22,894 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:22,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:22,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086868139] [2021-05-02 12:04:22,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086868139] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:22,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139463149] [2021-05-02 12:04:22,894 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:22,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 12:04:22,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:22,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-02 12:04:22,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:22,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:22,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:22,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:22,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:22,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:22,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:22,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:22,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:22,998 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:22,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139463149] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:22,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:22,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-05-02 12:04:22,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524531079] [2021-05-02 12:04:22,999 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 12:04:22,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:23,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 12:04:23,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 12:04:23,001 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:23,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:23,042 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2021-05-02 12:04:23,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 12:04:23,043 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-05-02 12:04:23,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:23,044 INFO L225 Difference]: With dead ends: 30 [2021-05-02 12:04:23,044 INFO L226 Difference]: Without dead ends: 24 [2021-05-02 12:04:23,045 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 34.1ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 12:04:23,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-02 12:04:23,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-05-02 12:04:23,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:23,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2021-05-02 12:04:23,051 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2021-05-02 12:04:23,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:23,051 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2021-05-02 12:04:23,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:23,051 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2021-05-02 12:04:23,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 12:04:23,052 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:23,052 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:23,256 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:23,257 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:23,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:23,257 INFO L82 PathProgramCache]: Analyzing trace with hash 834781796, now seen corresponding path program 5 times [2021-05-02 12:04:23,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:23,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931793748] [2021-05-02 12:04:23,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:23,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:23,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:23,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:23,331 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:23,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:23,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931793748] [2021-05-02 12:04:23,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931793748] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:23,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629261735] [2021-05-02 12:04:23,332 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:23,387 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-02 12:04:23,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:23,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 12:04:23,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:23,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:23,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:23,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:23,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:23,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:23,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:23,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:23,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:23,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:23,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:23,431 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:23,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629261735] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:23,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:23,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-05-02 12:04:23,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240052446] [2021-05-02 12:04:23,432 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 12:04:23,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:23,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 12:04:23,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 12:04:23,432 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:23,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:23,476 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2021-05-02 12:04:23,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 12:04:23,477 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-05-02 12:04:23,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:23,477 INFO L225 Difference]: With dead ends: 32 [2021-05-02 12:04:23,477 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 12:04:23,478 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 43.2ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 12:04:23,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 12:04:23,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-05-02 12:04:23,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:23,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2021-05-02 12:04:23,480 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2021-05-02 12:04:23,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:23,480 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2021-05-02 12:04:23,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:23,481 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2021-05-02 12:04:23,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-02 12:04:23,481 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:23,481 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:23,693 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-02 12:04:23,693 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:23,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:23,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1807665786, now seen corresponding path program 6 times [2021-05-02 12:04:23,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:23,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155134826] [2021-05-02 12:04:23,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:23,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:23,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:23,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:23,786 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:23,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:23,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155134826] [2021-05-02 12:04:23,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155134826] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:23,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618693751] [2021-05-02 12:04:23,786 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:23,834 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-02 12:04:23,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:23,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 12:04:23,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:23,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:23,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:23,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:23,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:23,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:23,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:23,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:23,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:23,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:23,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:23,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:23,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:23,888 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:23,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618693751] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:23,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:23,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-05-02 12:04:23,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784897025] [2021-05-02 12:04:23,888 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 12:04:23,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:23,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 12:04:23,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-02 12:04:23,889 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:23,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:23,931 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2021-05-02 12:04:23,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 12:04:23,932 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-05-02 12:04:23,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:23,932 INFO L225 Difference]: With dead ends: 34 [2021-05-02 12:04:23,932 INFO L226 Difference]: Without dead ends: 28 [2021-05-02 12:04:23,932 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 61.5ms TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-02 12:04:23,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-02 12:04:23,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-05-02 12:04:23,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:23,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-05-02 12:04:23,935 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2021-05-02 12:04:23,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:23,935 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-05-02 12:04:23,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:23,935 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-05-02 12:04:23,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 12:04:23,936 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:23,936 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:24,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:24,149 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:24,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:24,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1420847144, now seen corresponding path program 7 times [2021-05-02 12:04:24,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:24,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962650822] [2021-05-02 12:04:24,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:24,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:24,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:24,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:24,234 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:24,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:24,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962650822] [2021-05-02 12:04:24,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962650822] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:24,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729841337] [2021-05-02 12:04:24,235 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:24,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:24,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 12:04:24,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:24,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:24,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:24,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:24,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:24,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:24,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:24,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:24,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:24,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:24,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:24,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:24,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:24,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:24,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:24,351 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:24,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729841337] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:24,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:24,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2021-05-02 12:04:24,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165954452] [2021-05-02 12:04:24,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 12:04:24,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:24,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 12:04:24,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 12:04:24,355 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:24,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:24,395 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2021-05-02 12:04:24,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 12:04:24,396 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-05-02 12:04:24,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:24,398 INFO L225 Difference]: With dead ends: 36 [2021-05-02 12:04:24,398 INFO L226 Difference]: Without dead ends: 30 [2021-05-02 12:04:24,399 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 48.6ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 12:04:24,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-02 12:04:24,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2021-05-02 12:04:24,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:24,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2021-05-02 12:04:24,407 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2021-05-02 12:04:24,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:24,407 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2021-05-02 12:04:24,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:24,407 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2021-05-02 12:04:24,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 12:04:24,408 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:24,408 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:24,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:24,627 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:24,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:24,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1239582134, now seen corresponding path program 8 times [2021-05-02 12:04:24,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:24,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958428931] [2021-05-02 12:04:24,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:24,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:24,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:24,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:24,724 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:24,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:24,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958428931] [2021-05-02 12:04:24,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958428931] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:24,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568487330] [2021-05-02 12:04:24,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:24,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 12:04:24,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:24,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 12:04:24,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:24,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:24,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:24,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:24,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:24,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:24,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:24,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:24,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:24,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:24,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:24,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:24,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:24,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:24,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:24,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:24,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:24,833 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:24,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568487330] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:24,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:24,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-05-02 12:04:24,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694922828] [2021-05-02 12:04:24,834 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 12:04:24,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:24,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 12:04:24,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-02 12:04:24,834 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:24,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:24,897 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2021-05-02 12:04:24,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 12:04:24,897 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-05-02 12:04:24,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:24,898 INFO L225 Difference]: With dead ends: 38 [2021-05-02 12:04:24,898 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 12:04:24,898 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 49.3ms TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-02 12:04:24,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 12:04:24,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2021-05-02 12:04:24,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:24,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2021-05-02 12:04:24,900 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2021-05-02 12:04:24,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:24,900 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2021-05-02 12:04:24,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:24,901 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2021-05-02 12:04:24,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 12:04:24,901 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:24,901 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:25,121 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 12:04:25,121 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:25,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:25,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1888390124, now seen corresponding path program 9 times [2021-05-02 12:04:25,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:25,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332315329] [2021-05-02 12:04:25,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:25,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:25,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:25,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:25,222 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:25,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:25,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332315329] [2021-05-02 12:04:25,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332315329] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:25,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126797474] [2021-05-02 12:04:25,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:25,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-02 12:04:25,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:25,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 12:04:25,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:25,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:25,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:25,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:25,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:25,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:25,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:25,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:25,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:25,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:25,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:25,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:25,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:25,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:25,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:25,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:25,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:25,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:25,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:25,372 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:25,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126797474] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:25,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:25,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-05-02 12:04:25,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112786534] [2021-05-02 12:04:25,373 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 12:04:25,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:25,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 12:04:25,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-02 12:04:25,374 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:25,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:25,421 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2021-05-02 12:04:25,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 12:04:25,421 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-05-02 12:04:25,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:25,422 INFO L225 Difference]: With dead ends: 40 [2021-05-02 12:04:25,422 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 12:04:25,422 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 67.5ms TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-02 12:04:25,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 12:04:25,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-05-02 12:04:25,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:25,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2021-05-02 12:04:25,425 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2021-05-02 12:04:25,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:25,425 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2021-05-02 12:04:25,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:25,425 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2021-05-02 12:04:25,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 12:04:25,426 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:25,426 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:25,633 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:25,636 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:25,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:25,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1392622862, now seen corresponding path program 10 times [2021-05-02 12:04:25,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:25,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147216642] [2021-05-02 12:04:25,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:25,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:25,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:25,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:25,734 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:25,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:25,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147216642] [2021-05-02 12:04:25,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147216642] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:25,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191303428] [2021-05-02 12:04:25,734 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:25,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 12:04:25,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:25,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-02 12:04:25,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:25,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:25,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:25,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:25,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:25,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:25,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:25,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:25,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:25,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:25,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:25,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:25,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:25,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:25,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:25,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:25,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:25,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:25,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:25,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:25,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:25,874 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:25,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191303428] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:25,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:25,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-05-02 12:04:25,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939415395] [2021-05-02 12:04:25,875 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 12:04:25,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:25,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 12:04:25,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-02 12:04:25,876 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:25,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:25,936 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2021-05-02 12:04:25,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 12:04:25,937 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2021-05-02 12:04:25,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:25,938 INFO L225 Difference]: With dead ends: 42 [2021-05-02 12:04:25,938 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 12:04:25,939 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 66.5ms TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-02 12:04:25,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 12:04:25,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-05-02 12:04:25,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:25,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2021-05-02 12:04:25,941 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2021-05-02 12:04:25,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:25,941 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2021-05-02 12:04:25,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:25,941 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2021-05-02 12:04:25,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 12:04:25,942 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:25,942 INFO L523 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:26,159 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:26,159 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:26,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:26,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1701653936, now seen corresponding path program 11 times [2021-05-02 12:04:26,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:26,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950812608] [2021-05-02 12:04:26,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:26,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:26,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:26,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:26,317 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:26,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:26,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950812608] [2021-05-02 12:04:26,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950812608] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:26,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855674396] [2021-05-02 12:04:26,317 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:26,385 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-05-02 12:04:26,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:26,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 12:04:26,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:26,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:26,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:26,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:26,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:26,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:26,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:26,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:26,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:26,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:26,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:26,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:26,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:26,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:26,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:26,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:26,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:26,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:26,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:26,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:26,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:26,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:26,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:26,488 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:26,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855674396] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:26,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:26,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-05-02 12:04:26,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057554648] [2021-05-02 12:04:26,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 12:04:26,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:26,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 12:04:26,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-02 12:04:26,489 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:26,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:26,546 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2021-05-02 12:04:26,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 12:04:26,547 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2021-05-02 12:04:26,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:26,547 INFO L225 Difference]: With dead ends: 44 [2021-05-02 12:04:26,547 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 12:04:26,547 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 121.6ms TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-02 12:04:26,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 12:04:26,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2021-05-02 12:04:26,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:26,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2021-05-02 12:04:26,550 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2021-05-02 12:04:26,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:26,550 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2021-05-02 12:04:26,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:26,550 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2021-05-02 12:04:26,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 12:04:26,551 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:26,551 INFO L523 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:26,751 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 12:04:26,751 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:26,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:26,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1967194670, now seen corresponding path program 12 times [2021-05-02 12:04:26,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:26,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751617297] [2021-05-02 12:04:26,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:26,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:26,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:26,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:26,880 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:26,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:26,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751617297] [2021-05-02 12:04:26,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751617297] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:26,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096768357] [2021-05-02 12:04:26,880 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:26,999 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-05-02 12:04:27,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:27,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 12:04:27,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:27,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,071 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:27,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096768357] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:27,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:27,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2021-05-02 12:04:27,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842439725] [2021-05-02 12:04:27,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 12:04:27,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:27,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 12:04:27,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-05-02 12:04:27,072 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:27,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:27,121 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2021-05-02 12:04:27,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 12:04:27,122 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-05-02 12:04:27,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:27,122 INFO L225 Difference]: With dead ends: 46 [2021-05-02 12:04:27,122 INFO L226 Difference]: Without dead ends: 40 [2021-05-02 12:04:27,123 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 92.0ms TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-05-02 12:04:27,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-02 12:04:27,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-05-02 12:04:27,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:27,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2021-05-02 12:04:27,125 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2021-05-02 12:04:27,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:27,125 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2021-05-02 12:04:27,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:27,125 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2021-05-02 12:04:27,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 12:04:27,126 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:27,126 INFO L523 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:27,329 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 12:04:27,329 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:27,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:27,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1562555020, now seen corresponding path program 13 times [2021-05-02 12:04:27,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:27,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093854347] [2021-05-02 12:04:27,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:27,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:27,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:27,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:27,450 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:27,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:27,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093854347] [2021-05-02 12:04:27,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093854347] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:27,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477654213] [2021-05-02 12:04:27,450 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:27,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:27,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 12:04:27,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:27,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,607 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:27,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477654213] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:27,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:27,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2021-05-02 12:04:27,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503160176] [2021-05-02 12:04:27,607 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 12:04:27,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:27,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 12:04:27,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-02 12:04:27,608 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:27,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:27,654 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2021-05-02 12:04:27,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 12:04:27,655 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2021-05-02 12:04:27,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:27,655 INFO L225 Difference]: With dead ends: 48 [2021-05-02 12:04:27,655 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 12:04:27,656 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 95.3ms TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-02 12:04:27,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 12:04:27,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-05-02 12:04:27,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:27,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2021-05-02 12:04:27,658 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2021-05-02 12:04:27,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:27,658 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2021-05-02 12:04:27,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:27,658 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2021-05-02 12:04:27,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-02 12:04:27,659 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:27,659 INFO L523 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:27,872 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-02 12:04:27,873 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:27,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:27,873 INFO L82 PathProgramCache]: Analyzing trace with hash 749091990, now seen corresponding path program 14 times [2021-05-02 12:04:27,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:27,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222362008] [2021-05-02 12:04:27,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:27,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:28,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:28,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:28,041 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:28,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:28,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222362008] [2021-05-02 12:04:28,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222362008] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:28,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496057485] [2021-05-02 12:04:28,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:28,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 12:04:28,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:28,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-02 12:04:28,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:28,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,161 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:28,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496057485] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:28,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:28,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2021-05-02 12:04:28,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352643134] [2021-05-02 12:04:28,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 12:04:28,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:28,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 12:04:28,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-02 12:04:28,163 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:28,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:28,228 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2021-05-02 12:04:28,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 12:04:28,229 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-05-02 12:04:28,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:28,229 INFO L225 Difference]: With dead ends: 50 [2021-05-02 12:04:28,229 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 12:04:28,230 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 126.5ms TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-02 12:04:28,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 12:04:28,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2021-05-02 12:04:28,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:28,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2021-05-02 12:04:28,235 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2021-05-02 12:04:28,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:28,235 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2021-05-02 12:04:28,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:28,235 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2021-05-02 12:04:28,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 12:04:28,236 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:28,236 INFO L523 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:28,444 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:28,445 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:28,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:28,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1743776568, now seen corresponding path program 15 times [2021-05-02 12:04:28,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:28,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605010369] [2021-05-02 12:04:28,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:28,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:28,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:28,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:28,601 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:28,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:28,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605010369] [2021-05-02 12:04:28,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605010369] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:28,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151841136] [2021-05-02 12:04:28,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:28,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-05-02 12:04:28,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:28,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 12:04:28,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:28,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,795 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:28,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151841136] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:28,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:28,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2021-05-02 12:04:28,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358352064] [2021-05-02 12:04:28,796 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 12:04:28,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:28,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 12:04:28,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-05-02 12:04:28,797 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:28,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:28,855 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2021-05-02 12:04:28,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 12:04:28,856 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2021-05-02 12:04:28,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:28,856 INFO L225 Difference]: With dead ends: 52 [2021-05-02 12:04:28,856 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 12:04:28,856 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 129.0ms TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-05-02 12:04:28,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 12:04:28,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-05-02 12:04:28,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.025) internal successors, (41), 40 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:28,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2021-05-02 12:04:28,859 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2021-05-02 12:04:28,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:28,859 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2021-05-02 12:04:28,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:28,859 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2021-05-02 12:04:28,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 12:04:28,860 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:28,860 INFO L523 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:29,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 12:04:29,065 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:29,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:29,065 INFO L82 PathProgramCache]: Analyzing trace with hash -142050982, now seen corresponding path program 16 times [2021-05-02 12:04:29,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:29,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62015980] [2021-05-02 12:04:29,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:29,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:29,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:29,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:29,229 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:29,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:29,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62015980] [2021-05-02 12:04:29,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62015980] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:29,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278214032] [2021-05-02 12:04:29,230 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:29,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 12:04:29,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:29,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 12:04:29,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:29,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:29,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:29,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:29,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:29,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:29,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:29,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:29,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:29,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:29,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:29,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:29,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:29,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:29,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:29,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:29,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:29,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:29,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:29,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:29,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:29,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:29,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:29,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:29,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:29,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:29,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:29,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:29,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:29,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:29,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:29,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:29,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:29,370 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:29,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278214032] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:29,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:29,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2021-05-02 12:04:29,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613046071] [2021-05-02 12:04:29,371 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 12:04:29,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:29,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 12:04:29,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-05-02 12:04:29,372 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:29,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:29,430 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2021-05-02 12:04:29,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 12:04:29,430 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-05-02 12:04:29,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:29,430 INFO L225 Difference]: With dead ends: 54 [2021-05-02 12:04:29,430 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 12:04:29,431 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 127.3ms TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-05-02 12:04:29,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 12:04:29,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2021-05-02 12:04:29,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 42 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:29,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2021-05-02 12:04:29,433 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2021-05-02 12:04:29,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:29,433 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2021-05-02 12:04:29,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:29,434 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2021-05-02 12:04:29,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 12:04:29,434 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:29,434 INFO L523 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:29,648 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 12:04:29,649 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:29,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:29,649 INFO L82 PathProgramCache]: Analyzing trace with hash 53872380, now seen corresponding path program 17 times [2021-05-02 12:04:29,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:29,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580273048] [2021-05-02 12:04:29,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:29,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:29,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:29,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:29,847 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:29,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:29,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580273048] [2021-05-02 12:04:29,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580273048] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:29,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287227961] [2021-05-02 12:04:29,847 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:29,991 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-05-02 12:04:29,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:29,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 12:04:29,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:30,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,073 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:30,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287227961] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:30,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:30,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2021-05-02 12:04:30,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665515570] [2021-05-02 12:04:30,074 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 12:04:30,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:30,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 12:04:30,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-02 12:04:30,075 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:30,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:30,166 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2021-05-02 12:04:30,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 12:04:30,166 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2021-05-02 12:04:30,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:30,167 INFO L225 Difference]: With dead ends: 56 [2021-05-02 12:04:30,167 INFO L226 Difference]: Without dead ends: 50 [2021-05-02 12:04:30,167 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 159.8ms TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-02 12:04:30,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-02 12:04:30,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2021-05-02 12:04:30,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:30,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2021-05-02 12:04:30,169 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2021-05-02 12:04:30,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:30,170 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2021-05-02 12:04:30,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:30,170 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2021-05-02 12:04:30,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-02 12:04:30,170 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:30,170 INFO L523 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:30,370 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:30,371 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:30,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:30,371 INFO L82 PathProgramCache]: Analyzing trace with hash -642337762, now seen corresponding path program 18 times [2021-05-02 12:04:30,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:30,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781090455] [2021-05-02 12:04:30,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:30,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:30,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:30,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:30,598 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:30,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:30,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781090455] [2021-05-02 12:04:30,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781090455] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:30,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462502839] [2021-05-02 12:04:30,599 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:30,792 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-05-02 12:04:30,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:30,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 12:04:30,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:30,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,884 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:30,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462502839] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:30,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:30,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2021-05-02 12:04:30,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009222388] [2021-05-02 12:04:30,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 12:04:30,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:30,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 12:04:30,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-05-02 12:04:30,885 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:30,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:30,961 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2021-05-02 12:04:30,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 12:04:30,961 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2021-05-02 12:04:30,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:30,962 INFO L225 Difference]: With dead ends: 58 [2021-05-02 12:04:30,962 INFO L226 Difference]: Without dead ends: 52 [2021-05-02 12:04:30,962 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 178.4ms TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-05-02 12:04:30,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-02 12:04:30,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2021-05-02 12:04:30,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:30,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2021-05-02 12:04:30,964 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2021-05-02 12:04:30,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:30,964 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2021-05-02 12:04:30,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:30,964 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2021-05-02 12:04:30,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 12:04:30,965 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:30,965 INFO L523 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:31,177 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:31,177 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:31,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:31,177 INFO L82 PathProgramCache]: Analyzing trace with hash 314613952, now seen corresponding path program 19 times [2021-05-02 12:04:31,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:31,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979002516] [2021-05-02 12:04:31,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:31,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:31,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:31,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:31,401 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:31,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:31,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979002516] [2021-05-02 12:04:31,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979002516] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:31,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192890813] [2021-05-02 12:04:31,402 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:31,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:31,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 12:04:31,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:31,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,533 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:31,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192890813] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:31,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:31,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2021-05-02 12:04:31,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401870686] [2021-05-02 12:04:31,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 12:04:31,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:31,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 12:04:31,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2021-05-02 12:04:31,534 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:31,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:31,600 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2021-05-02 12:04:31,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-02 12:04:31,600 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-05-02 12:04:31,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:31,601 INFO L225 Difference]: With dead ends: 60 [2021-05-02 12:04:31,601 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 12:04:31,601 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 192.6ms TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2021-05-02 12:04:31,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 12:04:31,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-05-02 12:04:31,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 48 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:31,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2021-05-02 12:04:31,603 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2021-05-02 12:04:31,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:31,604 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2021-05-02 12:04:31,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:31,604 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2021-05-02 12:04:31,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 12:04:31,604 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:31,604 INFO L523 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:31,809 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:31,809 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:31,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:31,810 INFO L82 PathProgramCache]: Analyzing trace with hash 822209762, now seen corresponding path program 20 times [2021-05-02 12:04:31,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:31,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761795288] [2021-05-02 12:04:31,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:31,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:32,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:32,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:32,033 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:32,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:32,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761795288] [2021-05-02 12:04:32,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761795288] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:32,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348732616] [2021-05-02 12:04:32,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:32,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 12:04:32,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:32,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 12:04:32,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:32,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,190 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:32,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348732616] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:32,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:32,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2021-05-02 12:04:32,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585760605] [2021-05-02 12:04:32,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 12:04:32,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:32,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 12:04:32,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2021-05-02 12:04:32,191 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:32,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:32,270 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2021-05-02 12:04:32,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 12:04:32,271 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2021-05-02 12:04:32,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:32,271 INFO L225 Difference]: With dead ends: 62 [2021-05-02 12:04:32,271 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 12:04:32,272 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 186.1ms TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2021-05-02 12:04:32,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 12:04:32,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-02 12:04:32,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:32,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2021-05-02 12:04:32,275 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2021-05-02 12:04:32,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:32,275 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2021-05-02 12:04:32,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:32,275 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2021-05-02 12:04:32,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 12:04:32,276 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:32,276 INFO L523 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:32,492 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-02 12:04:32,493 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:32,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:32,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1004488572, now seen corresponding path program 21 times [2021-05-02 12:04:32,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:32,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583071756] [2021-05-02 12:04:32,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:32,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:32,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:32,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:32,747 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:32,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:32,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583071756] [2021-05-02 12:04:32,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583071756] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:32,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461266184] [2021-05-02 12:04:32,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:32,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-05-02 12:04:32,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:32,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 12:04:32,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:32,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,021 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:33,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461266184] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:33,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:33,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2021-05-02 12:04:33,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392815514] [2021-05-02 12:04:33,022 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 12:04:33,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:33,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 12:04:33,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-05-02 12:04:33,023 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:33,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:33,077 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2021-05-02 12:04:33,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-02 12:04:33,078 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2021-05-02 12:04:33,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:33,078 INFO L225 Difference]: With dead ends: 64 [2021-05-02 12:04:33,078 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 12:04:33,079 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 199.0ms TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-05-02 12:04:33,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 12:04:33,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-05-02 12:04:33,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:33,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2021-05-02 12:04:33,080 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2021-05-02 12:04:33,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:33,081 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2021-05-02 12:04:33,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:33,081 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2021-05-02 12:04:33,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-02 12:04:33,081 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:33,081 INFO L523 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:33,288 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-02 12:04:33,289 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:33,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:33,289 INFO L82 PathProgramCache]: Analyzing trace with hash 180036518, now seen corresponding path program 22 times [2021-05-02 12:04:33,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:33,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124192662] [2021-05-02 12:04:33,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:33,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:33,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:33,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:33,562 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:33,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:33,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124192662] [2021-05-02 12:04:33,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124192662] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:33,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942706352] [2021-05-02 12:04:33,562 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:33,607 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 12:04:33,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:33,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 12:04:33,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:33,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,710 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:33,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942706352] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:33,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:33,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2021-05-02 12:04:33,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893023056] [2021-05-02 12:04:33,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-02 12:04:33,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:33,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-02 12:04:33,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2021-05-02 12:04:33,711 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:33,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:33,793 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2021-05-02 12:04:33,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-02 12:04:33,794 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2021-05-02 12:04:33,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:33,794 INFO L225 Difference]: With dead ends: 66 [2021-05-02 12:04:33,794 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 12:04:33,794 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 233.2ms TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2021-05-02 12:04:33,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 12:04:33,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-05-02 12:04:33,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 54 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:33,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2021-05-02 12:04:33,796 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2021-05-02 12:04:33,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:33,796 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2021-05-02 12:04:33,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:33,797 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2021-05-02 12:04:33,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-02 12:04:33,797 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:33,797 INFO L523 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:34,013 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:34,014 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:34,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:34,014 INFO L82 PathProgramCache]: Analyzing trace with hash 342314568, now seen corresponding path program 23 times [2021-05-02 12:04:34,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:34,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434481423] [2021-05-02 12:04:34,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:34,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:34,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:34,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:34,301 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:34,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:34,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434481423] [2021-05-02 12:04:34,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434481423] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:34,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742448578] [2021-05-02 12:04:34,301 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:34,583 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-05-02 12:04:34,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:34,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 12:04:34,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:34,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,710 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:34,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742448578] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:34,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:34,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2021-05-02 12:04:34,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170287626] [2021-05-02 12:04:34,711 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-02 12:04:34,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:34,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-02 12:04:34,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2021-05-02 12:04:34,712 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:34,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:34,799 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2021-05-02 12:04:34,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-02 12:04:34,799 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2021-05-02 12:04:34,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:34,800 INFO L225 Difference]: With dead ends: 68 [2021-05-02 12:04:34,800 INFO L226 Difference]: Without dead ends: 62 [2021-05-02 12:04:34,800 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 258.6ms TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2021-05-02 12:04:34,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-02 12:04:34,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-05-02 12:04:34,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 56 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:34,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2021-05-02 12:04:34,802 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2021-05-02 12:04:34,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:34,803 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2021-05-02 12:04:34,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:34,803 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2021-05-02 12:04:34,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-02 12:04:34,803 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:34,803 INFO L523 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:35,016 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-02 12:04:35,017 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:35,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:35,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1672697962, now seen corresponding path program 24 times [2021-05-02 12:04:35,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:35,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833554921] [2021-05-02 12:04:35,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:35,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:35,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:35,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:35,339 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:35,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:35,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833554921] [2021-05-02 12:04:35,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833554921] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:35,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753852233] [2021-05-02 12:04:35,340 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:36,697 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-05-02 12:04:36,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:36,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 12:04:36,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:36,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,807 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:36,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753852233] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:36,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:36,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2021-05-02 12:04:36,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194162082] [2021-05-02 12:04:36,808 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-02 12:04:36,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:36,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-02 12:04:36,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2021-05-02 12:04:36,808 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 states have internal predecessors, (60), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:36,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:36,917 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2021-05-02 12:04:36,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-02 12:04:36,917 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 states have internal predecessors, (60), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2021-05-02 12:04:36,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:36,918 INFO L225 Difference]: With dead ends: 70 [2021-05-02 12:04:36,918 INFO L226 Difference]: Without dead ends: 64 [2021-05-02 12:04:36,918 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 277.4ms TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2021-05-02 12:04:36,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-02 12:04:36,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-05-02 12:04:36,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 58 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:36,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2021-05-02 12:04:36,920 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2021-05-02 12:04:36,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:36,920 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2021-05-02 12:04:36,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 states have internal predecessors, (60), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:36,920 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2021-05-02 12:04:36,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-02 12:04:36,921 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:36,921 INFO L523 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:37,132 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:37,133 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:37,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:37,133 INFO L82 PathProgramCache]: Analyzing trace with hash 270885388, now seen corresponding path program 25 times [2021-05-02 12:04:37,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:37,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629547110] [2021-05-02 12:04:37,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:37,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:37,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:37,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:37,474 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:37,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:37,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629547110] [2021-05-02 12:04:37,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629547110] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:37,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273423154] [2021-05-02 12:04:37,474 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:37,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:37,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 12:04:37,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:37,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,637 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:37,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273423154] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:37,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:37,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2021-05-02 12:04:37,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122472438] [2021-05-02 12:04:37,637 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 12:04:37,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:37,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 12:04:37,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2021-05-02 12:04:37,638 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:37,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:37,731 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2021-05-02 12:04:37,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-02 12:04:37,731 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2021-05-02 12:04:37,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:37,732 INFO L225 Difference]: With dead ends: 72 [2021-05-02 12:04:37,732 INFO L226 Difference]: Without dead ends: 66 [2021-05-02 12:04:37,732 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 297.5ms TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2021-05-02 12:04:37,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-05-02 12:04:37,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2021-05-02 12:04:37,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 60 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:37,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2021-05-02 12:04:37,734 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2021-05-02 12:04:37,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:37,734 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2021-05-02 12:04:37,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:37,734 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2021-05-02 12:04:37,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-02 12:04:37,735 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:37,735 INFO L523 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:37,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-02 12:04:37,949 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:37,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:37,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1748732718, now seen corresponding path program 26 times [2021-05-02 12:04:37,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:37,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489699190] [2021-05-02 12:04:37,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:37,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:38,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:38,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:38,250 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:38,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:38,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489699190] [2021-05-02 12:04:38,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489699190] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:38,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298914710] [2021-05-02 12:04:38,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:38,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 12:04:38,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:38,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 12:04:38,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:38,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:38,418 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:38,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298914710] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:38,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:38,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2021-05-02 12:04:38,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958285889] [2021-05-02 12:04:38,419 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-02 12:04:38,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:38,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-02 12:04:38,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2021-05-02 12:04:38,420 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:38,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:38,519 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2021-05-02 12:04:38,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-02 12:04:38,520 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2021-05-02 12:04:38,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:38,520 INFO L225 Difference]: With dead ends: 74 [2021-05-02 12:04:38,520 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 12:04:38,521 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 272.4ms TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2021-05-02 12:04:38,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 12:04:38,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2021-05-02 12:04:38,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.0161290322580645) internal successors, (63), 62 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:38,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2021-05-02 12:04:38,524 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2021-05-02 12:04:38,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:38,524 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2021-05-02 12:04:38,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:38,524 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2021-05-02 12:04:38,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-02 12:04:38,524 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:38,524 INFO L523 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:38,741 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-02 12:04:38,741 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:38,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:38,741 INFO L82 PathProgramCache]: Analyzing trace with hash 325841872, now seen corresponding path program 27 times [2021-05-02 12:04:38,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:38,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082131059] [2021-05-02 12:04:38,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:38,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:39,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:39,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:39,064 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:39,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:39,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082131059] [2021-05-02 12:04:39,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082131059] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:39,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114749005] [2021-05-02 12:04:39,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:39,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-05-02 12:04:39,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:39,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 12:04:39,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:39,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:39,792 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:39,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114749005] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:39,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:39,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2021-05-02 12:04:39,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220389471] [2021-05-02 12:04:39,792 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 12:04:39,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:39,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 12:04:39,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2021-05-02 12:04:39,793 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:39,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:39,884 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2021-05-02 12:04:39,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-02 12:04:39,885 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2021-05-02 12:04:39,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:39,885 INFO L225 Difference]: With dead ends: 76 [2021-05-02 12:04:39,885 INFO L226 Difference]: Without dead ends: 70 [2021-05-02 12:04:39,886 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 289.7ms TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2021-05-02 12:04:39,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-05-02 12:04:39,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2021-05-02 12:04:39,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.015625) internal successors, (65), 64 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:39,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2021-05-02 12:04:39,887 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2021-05-02 12:04:39,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:39,887 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2021-05-02 12:04:39,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:39,888 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2021-05-02 12:04:39,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 12:04:39,888 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:39,888 INFO L523 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:40,092 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-02 12:04:40,093 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:40,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:40,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1272661006, now seen corresponding path program 28 times [2021-05-02 12:04:40,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:40,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431538600] [2021-05-02 12:04:40,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:40,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:40,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:40,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:40,451 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:40,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:40,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431538600] [2021-05-02 12:04:40,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431538600] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:40,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846081903] [2021-05-02 12:04:40,451 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:40,501 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 12:04:40,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:40,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 12:04:40,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:40,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,620 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:40,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846081903] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:40,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:40,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2021-05-02 12:04:40,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053076750] [2021-05-02 12:04:40,621 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-02 12:04:40,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:40,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-02 12:04:40,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 12:04:40,622 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 32 states have internal predecessors, (68), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:40,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:40,727 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2021-05-02 12:04:40,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-02 12:04:40,728 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 32 states have internal predecessors, (68), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2021-05-02 12:04:40,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:40,728 INFO L225 Difference]: With dead ends: 78 [2021-05-02 12:04:40,728 INFO L226 Difference]: Without dead ends: 72 [2021-05-02 12:04:40,729 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 317.3ms TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 12:04:40,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-02 12:04:40,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2021-05-02 12:04:40,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 66 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:40,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2021-05-02 12:04:40,730 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2021-05-02 12:04:40,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:40,730 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2021-05-02 12:04:40,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 32 states have internal predecessors, (68), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:40,731 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2021-05-02 12:04:40,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-02 12:04:40,731 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:40,731 INFO L523 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:40,931 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:40,932 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:40,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:40,932 INFO L82 PathProgramCache]: Analyzing trace with hash 164365204, now seen corresponding path program 29 times [2021-05-02 12:04:40,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:40,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028566640] [2021-05-02 12:04:40,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:40,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:41,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:41,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:41,318 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:41,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:41,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028566640] [2021-05-02 12:04:41,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028566640] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:41,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553574986] [2021-05-02 12:04:41,319 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:41,917 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2021-05-02 12:04:41,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:41,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 12:04:41,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:41,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,041 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:42,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553574986] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:42,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:42,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 34 [2021-05-02 12:04:42,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37727412] [2021-05-02 12:04:42,042 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-02 12:04:42,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:42,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-02 12:04:42,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 12:04:42,042 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:42,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:42,151 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2021-05-02 12:04:42,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-02 12:04:42,151 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2021-05-02 12:04:42,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:42,152 INFO L225 Difference]: With dead ends: 80 [2021-05-02 12:04:42,152 INFO L226 Difference]: Without dead ends: 74 [2021-05-02 12:04:42,152 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 352.9ms TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 12:04:42,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-02 12:04:42,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2021-05-02 12:04:42,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.0147058823529411) internal successors, (69), 68 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:42,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2021-05-02 12:04:42,154 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2021-05-02 12:04:42,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:42,154 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2021-05-02 12:04:42,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:42,154 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2021-05-02 12:04:42,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 12:04:42,155 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:42,155 INFO L523 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:42,368 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-05-02 12:04:42,368 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:42,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:42,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1832916298, now seen corresponding path program 30 times [2021-05-02 12:04:42,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:42,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220456645] [2021-05-02 12:04:42,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:42,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:42,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:42,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:42,793 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:42,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:42,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220456645] [2021-05-02 12:04:42,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220456645] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:42,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388620965] [2021-05-02 12:04:42,794 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:43,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-05-02 12:04:43,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:43,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 12:04:43,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:43,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:43,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,007 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:44,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388620965] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:44,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:44,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2021-05-02 12:04:44,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616799826] [2021-05-02 12:04:44,008 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-02 12:04:44,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:44,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-02 12:04:44,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 12:04:44,008 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 states have internal predecessors, (72), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:44,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:44,119 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2021-05-02 12:04:44,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-02 12:04:44,119 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 states have internal predecessors, (72), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2021-05-02 12:04:44,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:44,120 INFO L225 Difference]: With dead ends: 82 [2021-05-02 12:04:44,120 INFO L226 Difference]: Without dead ends: 76 [2021-05-02 12:04:44,121 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 383.9ms TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 12:04:44,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-02 12:04:44,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2021-05-02 12:04:44,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.0142857142857142) internal successors, (71), 70 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:44,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2021-05-02 12:04:44,124 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2021-05-02 12:04:44,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:44,124 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2021-05-02 12:04:44,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 states have internal predecessors, (72), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:44,124 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2021-05-02 12:04:44,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 12:04:44,125 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:44,125 INFO L523 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:44,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:44,341 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:44,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:44,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1370058408, now seen corresponding path program 31 times [2021-05-02 12:04:44,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:44,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705700235] [2021-05-02 12:04:44,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:44,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:44,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:44,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:44,737 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:44,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:44,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705700235] [2021-05-02 12:04:44,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705700235] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:44,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98290034] [2021-05-02 12:04:44,737 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:44,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:44,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 12:04:44,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:44,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,923 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:44,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98290034] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:44,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:44,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 36 [2021-05-02 12:04:44,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423866489] [2021-05-02 12:04:44,924 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-02 12:04:44,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:44,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-02 12:04:44,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 12:04:44,925 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 35 states have internal predecessors, (74), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:45,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:45,040 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2021-05-02 12:04:45,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-02 12:04:45,041 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 35 states have internal predecessors, (74), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2021-05-02 12:04:45,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:45,041 INFO L225 Difference]: With dead ends: 84 [2021-05-02 12:04:45,041 INFO L226 Difference]: Without dead ends: 78 [2021-05-02 12:04:45,042 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 365.7ms TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 12:04:45,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-02 12:04:45,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2021-05-02 12:04:45,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.0138888888888888) internal successors, (73), 72 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:45,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2021-05-02 12:04:45,045 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2021-05-02 12:04:45,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:45,045 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2021-05-02 12:04:45,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 35 states have internal predecessors, (74), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:45,045 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2021-05-02 12:04:45,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-02 12:04:45,045 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:45,045 INFO L523 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:45,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-05-02 12:04:45,260 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:45,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:45,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1054742394, now seen corresponding path program 32 times [2021-05-02 12:04:45,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:45,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200533942] [2021-05-02 12:04:45,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:45,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:45,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:45,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:45,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:45,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:45,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200533942] [2021-05-02 12:04:45,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200533942] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:45,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655734526] [2021-05-02 12:04:45,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:45,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 12:04:45,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:45,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 12:04:45,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:45,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:45,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655734526] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:45,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:45,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2021-05-02 12:04:45,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243636162] [2021-05-02 12:04:45,892 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-02 12:04:45,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:45,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-02 12:04:45,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 12:04:45,892 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 36 states have internal predecessors, (76), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:46,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:46,000 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2021-05-02 12:04:46,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-02 12:04:46,000 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 36 states have internal predecessors, (76), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2021-05-02 12:04:46,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:46,001 INFO L225 Difference]: With dead ends: 86 [2021-05-02 12:04:46,001 INFO L226 Difference]: Without dead ends: 80 [2021-05-02 12:04:46,001 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 405.3ms TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 12:04:46,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-05-02 12:04:46,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2021-05-02 12:04:46,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.0135135135135136) internal successors, (75), 74 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:46,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2021-05-02 12:04:46,003 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2021-05-02 12:04:46,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:46,003 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2021-05-02 12:04:46,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 36 states have internal predecessors, (76), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:46,003 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2021-05-02 12:04:46,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-02 12:04:46,004 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:46,004 INFO L523 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:46,204 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-02 12:04:46,204 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:46,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:46,205 INFO L82 PathProgramCache]: Analyzing trace with hash -878928612, now seen corresponding path program 33 times [2021-05-02 12:04:46,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:46,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413942312] [2021-05-02 12:04:46,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:46,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:46,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:46,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:46,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:46,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:46,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413942312] [2021-05-02 12:04:46,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413942312] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:46,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665631119] [2021-05-02 12:04:46,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:47,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2021-05-02 12:04:47,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:47,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 12:04:47,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:47,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:47,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665631119] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:47,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:47,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 38 [2021-05-02 12:04:47,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986334164] [2021-05-02 12:04:47,521 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-02 12:04:47,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:47,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-02 12:04:47,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 12:04:47,521 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand has 38 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 37 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:47,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:47,628 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2021-05-02 12:04:47,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-02 12:04:47,628 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 37 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2021-05-02 12:04:47,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:47,629 INFO L225 Difference]: With dead ends: 88 [2021-05-02 12:04:47,629 INFO L226 Difference]: Without dead ends: 82 [2021-05-02 12:04:47,629 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 438.9ms TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 12:04:47,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-02 12:04:47,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2021-05-02 12:04:47,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.013157894736842) internal successors, (77), 76 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:47,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2021-05-02 12:04:47,631 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2021-05-02 12:04:47,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:47,631 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2021-05-02 12:04:47,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 37 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:47,631 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2021-05-02 12:04:47,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 12:04:47,632 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:47,632 INFO L523 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:47,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-02 12:04:47,841 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:47,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:47,841 INFO L82 PathProgramCache]: Analyzing trace with hash 584073790, now seen corresponding path program 34 times [2021-05-02 12:04:47,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:47,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069088536] [2021-05-02 12:04:47,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:47,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:48,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:48,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:48,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:48,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:48,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069088536] [2021-05-02 12:04:48,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069088536] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:48,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319034521] [2021-05-02 12:04:48,338 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:48,398 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 12:04:48,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:48,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 12:04:48,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:48,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:48,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:48,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319034521] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:48,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:48,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 39 [2021-05-02 12:04:48,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069687087] [2021-05-02 12:04:48,536 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-02 12:04:48,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:48,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-02 12:04:48,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 12:04:48,537 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 38 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:48,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:48,672 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2021-05-02 12:04:48,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-02 12:04:48,673 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 38 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2021-05-02 12:04:48,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:48,673 INFO L225 Difference]: With dead ends: 90 [2021-05-02 12:04:48,673 INFO L226 Difference]: Without dead ends: 84 [2021-05-02 12:04:48,674 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 457.7ms TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 12:04:48,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-02 12:04:48,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2021-05-02 12:04:48,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.0128205128205128) internal successors, (79), 78 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:48,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2021-05-02 12:04:48,676 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2021-05-02 12:04:48,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:48,676 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2021-05-02 12:04:48,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 38 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:48,676 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2021-05-02 12:04:48,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-02 12:04:48,676 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:48,676 INFO L523 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:48,884 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-02 12:04:48,885 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:48,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:48,885 INFO L82 PathProgramCache]: Analyzing trace with hash 2075076320, now seen corresponding path program 35 times [2021-05-02 12:04:48,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:48,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999311432] [2021-05-02 12:04:48,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:48,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:49,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:49,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:49,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:49,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:49,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999311432] [2021-05-02 12:04:49,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999311432] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:49,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33311699] [2021-05-02 12:04:49,417 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:58,300 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2021-05-02 12:04:58,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:58,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 12:04:58,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:58,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:58,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:58,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33311699] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:58,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:58,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 40 [2021-05-02 12:04:58,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267904557] [2021-05-02 12:04:58,444 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-02 12:04:58,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:58,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-02 12:04:58,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 12:04:58,444 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand has 40 states, 40 states have (on average 2.05) internal successors, (82), 39 states have internal predecessors, (82), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:58,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:58,586 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2021-05-02 12:04:58,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-02 12:04:58,586 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.05) internal successors, (82), 39 states have internal predecessors, (82), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2021-05-02 12:04:58,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:58,586 INFO L225 Difference]: With dead ends: 92 [2021-05-02 12:04:58,586 INFO L226 Difference]: Without dead ends: 86 [2021-05-02 12:04:58,587 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 499.5ms TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 12:04:58,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-02 12:04:58,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2021-05-02 12:04:58,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.0125) internal successors, (81), 80 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:58,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2021-05-02 12:04:58,589 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2021-05-02 12:04:58,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:58,589 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2021-05-02 12:04:58,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.05) internal successors, (82), 39 states have internal predecessors, (82), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:58,589 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2021-05-02 12:04:58,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-05-02 12:04:58,589 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:58,589 INFO L523 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:58,792 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-02 12:04:58,793 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:58,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:58,793 INFO L82 PathProgramCache]: Analyzing trace with hash 409430786, now seen corresponding path program 36 times [2021-05-02 12:04:58,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:58,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162730533] [2021-05-02 12:04:58,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:58,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:59,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:59,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:59,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:59,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:59,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162730533] [2021-05-02 12:04:59,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162730533] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:59,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727556069] [2021-05-02 12:04:59,316 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:05:06,327 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2021-05-02 12:05:06,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:05:06,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 12:05:06,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:05:06,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:06,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:05:06,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727556069] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:06,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:05:06,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 41 [2021-05-02 12:05:06,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031556068] [2021-05-02 12:05:06,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-02 12:05:06,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:05:06,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-02 12:05:06,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 12:05:06,492 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand has 41 states, 41 states have (on average 2.048780487804878) internal successors, (84), 40 states have internal predecessors, (84), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:06,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:05:06,633 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2021-05-02 12:05:06,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-02 12:05:06,633 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.048780487804878) internal successors, (84), 40 states have internal predecessors, (84), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 84 [2021-05-02 12:05:06,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:05:06,634 INFO L225 Difference]: With dead ends: 94 [2021-05-02 12:05:06,634 INFO L226 Difference]: Without dead ends: 88 [2021-05-02 12:05:06,634 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 491.2ms TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 12:05:06,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-05-02 12:05:06,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2021-05-02 12:05:06,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.0121951219512195) internal successors, (83), 82 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:06,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2021-05-02 12:05:06,636 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2021-05-02 12:05:06,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:05:06,636 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2021-05-02 12:05:06,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.048780487804878) internal successors, (84), 40 states have internal predecessors, (84), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:06,637 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2021-05-02 12:05:06,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-02 12:05:06,637 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:05:06,637 INFO L523 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:05:06,849 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-02 12:05:06,849 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:05:06,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:05:06,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1746874020, now seen corresponding path program 37 times [2021-05-02 12:05:06,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:05:06,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221099649] [2021-05-02 12:05:06,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:05:06,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:07,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:05:07,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:07,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:05:07,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:05:07,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221099649] [2021-05-02 12:05:07,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221099649] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:07,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113314223] [2021-05-02 12:05:07,438 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:05:07,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:07,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-02 12:05:07,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:05:07,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:07,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:05:07,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113314223] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:07,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:05:07,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 42 [2021-05-02 12:05:07,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543070880] [2021-05-02 12:05:07,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-02 12:05:07,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:05:07,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-02 12:05:07,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 12:05:07,675 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 41 states have internal predecessors, (86), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:07,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:05:07,809 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2021-05-02 12:05:07,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-02 12:05:07,809 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 41 states have internal predecessors, (86), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2021-05-02 12:05:07,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:05:07,810 INFO L225 Difference]: With dead ends: 96 [2021-05-02 12:05:07,810 INFO L226 Difference]: Without dead ends: 90 [2021-05-02 12:05:07,810 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 538.2ms TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 12:05:07,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-05-02 12:05:07,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2021-05-02 12:05:07,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.0119047619047619) internal successors, (85), 84 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:07,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2021-05-02 12:05:07,812 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2021-05-02 12:05:07,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:05:07,812 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2021-05-02 12:05:07,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 41 states have internal predecessors, (86), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:07,812 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2021-05-02 12:05:07,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-05-02 12:05:07,813 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:05:07,813 INFO L523 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:05:08,016 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-02 12:05:08,017 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:05:08,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:05:08,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1460366906, now seen corresponding path program 38 times [2021-05-02 12:05:08,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:05:08,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742669381] [2021-05-02 12:05:08,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:05:08,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:08,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:05:08,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:08,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:05:08,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:05:08,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742669381] [2021-05-02 12:05:08,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742669381] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:08,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34250985] [2021-05-02 12:05:08,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:05:08,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 12:05:08,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:05:08,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-02 12:05:08,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:05:08,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:08,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:05:08,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34250985] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:08,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:05:08,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 43 [2021-05-02 12:05:08,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841367179] [2021-05-02 12:05:08,796 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-02 12:05:08,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:05:08,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-02 12:05:08,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 12:05:08,797 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:08,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:05:08,917 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2021-05-02 12:05:08,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-02 12:05:08,918 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 88 [2021-05-02 12:05:08,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:05:08,918 INFO L225 Difference]: With dead ends: 98 [2021-05-02 12:05:08,918 INFO L226 Difference]: Without dead ends: 92 [2021-05-02 12:05:08,919 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 540.2ms TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 12:05:08,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-05-02 12:05:08,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2021-05-02 12:05:08,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.0116279069767442) internal successors, (87), 86 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:08,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2021-05-02 12:05:08,920 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2021-05-02 12:05:08,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:05:08,921 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2021-05-02 12:05:08,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:08,921 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2021-05-02 12:05:08,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-02 12:05:08,921 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:05:08,921 INFO L523 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:05:09,121 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-02 12:05:09,122 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:05:09,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:05:09,122 INFO L82 PathProgramCache]: Analyzing trace with hash 167621736, now seen corresponding path program 39 times [2021-05-02 12:05:09,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:05:09,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93844020] [2021-05-02 12:05:09,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:05:09,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:09,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:05:09,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:09,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:05:09,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:05:09,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93844020] [2021-05-02 12:05:09,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93844020] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:09,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721333085] [2021-05-02 12:05:09,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:05:11,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2021-05-02 12:05:11,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:05:11,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-02 12:05:11,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:05:11,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:11,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:05:11,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721333085] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:11,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:05:11,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 44 [2021-05-02 12:05:11,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414820300] [2021-05-02 12:05:11,193 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-02 12:05:11,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:05:11,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-02 12:05:11,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 12:05:11,194 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand has 44 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 43 states have internal predecessors, (90), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:11,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:05:11,363 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2021-05-02 12:05:11,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-02 12:05:11,363 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 43 states have internal predecessors, (90), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 90 [2021-05-02 12:05:11,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:05:11,364 INFO L225 Difference]: With dead ends: 100 [2021-05-02 12:05:11,364 INFO L226 Difference]: Without dead ends: 94 [2021-05-02 12:05:11,365 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 565.4ms TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 12:05:11,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-02 12:05:11,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2021-05-02 12:05:11,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.0113636363636365) internal successors, (89), 88 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:11,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2021-05-02 12:05:11,368 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2021-05-02 12:05:11,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:05:11,368 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2021-05-02 12:05:11,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 43 states have internal predecessors, (90), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:11,368 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2021-05-02 12:05:11,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 12:05:11,369 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:05:11,369 INFO L523 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:05:11,584 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:05:11,585 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:05:11,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:05:11,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1296610954, now seen corresponding path program 40 times [2021-05-02 12:05:11,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:05:11,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042748645] [2021-05-02 12:05:11,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:05:11,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:12,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:05:12,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:12,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:05:12,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:05:12,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042748645] [2021-05-02 12:05:12,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042748645] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:12,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507223965] [2021-05-02 12:05:12,238 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:05:12,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 12:05:12,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:05:12,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-02 12:05:12,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:05:12,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:12,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:05:12,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507223965] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:12,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:05:12,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 45 [2021-05-02 12:05:12,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703804905] [2021-05-02 12:05:12,452 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-05-02 12:05:12,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:05:12,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-05-02 12:05:12,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2021-05-02 12:05:12,455 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand has 45 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 44 states have internal predecessors, (92), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:12,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:05:12,552 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2021-05-02 12:05:12,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-02 12:05:12,552 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 44 states have internal predecessors, (92), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2021-05-02 12:05:12,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:05:12,553 INFO L225 Difference]: With dead ends: 102 [2021-05-02 12:05:12,553 INFO L226 Difference]: Without dead ends: 96 [2021-05-02 12:05:12,553 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 606.5ms TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2021-05-02 12:05:12,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-02 12:05:12,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2021-05-02 12:05:12,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.011111111111111) internal successors, (91), 90 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:12,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2021-05-02 12:05:12,555 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2021-05-02 12:05:12,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:05:12,556 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2021-05-02 12:05:12,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 44 states have internal predecessors, (92), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:12,556 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2021-05-02 12:05:12,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-02 12:05:12,556 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:05:12,556 INFO L523 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:05:12,764 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:05:12,765 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:05:12,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:05:12,765 INFO L82 PathProgramCache]: Analyzing trace with hash -371476436, now seen corresponding path program 41 times [2021-05-02 12:05:12,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:05:12,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004128373] [2021-05-02 12:05:12,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:05:12,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:13,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:05:13,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:13,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:05:13,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:05:13,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004128373] [2021-05-02 12:05:13,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004128373] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:13,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248960227] [2021-05-02 12:05:13,447 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:05:23,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2021-05-02 12:05:23,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:05:23,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-02 12:05:23,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:05:23,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:23,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:05:23,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248960227] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:23,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:05:23,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 46 [2021-05-02 12:05:23,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400740871] [2021-05-02 12:05:23,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-02 12:05:23,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:05:23,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-02 12:05:23,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 12:05:23,408 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand has 46 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 45 states have internal predecessors, (94), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:23,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:05:23,585 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2021-05-02 12:05:23,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-02 12:05:23,586 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 45 states have internal predecessors, (94), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2021-05-02 12:05:23,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:05:23,586 INFO L225 Difference]: With dead ends: 104 [2021-05-02 12:05:23,586 INFO L226 Difference]: Without dead ends: 98 [2021-05-02 12:05:23,586 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 639.4ms TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 12:05:23,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-05-02 12:05:23,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2021-05-02 12:05:23,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.0108695652173914) internal successors, (93), 92 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:23,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2021-05-02 12:05:23,589 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2021-05-02 12:05:23,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:05:23,589 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2021-05-02 12:05:23,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 45 states have internal predecessors, (94), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:23,589 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2021-05-02 12:05:23,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-05-02 12:05:23,589 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:05:23,589 INFO L523 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:05:23,792 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-05-02 12:05:23,793 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:05:23,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:05:23,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1380656818, now seen corresponding path program 42 times [2021-05-02 12:05:23,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:05:23,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401496301] [2021-05-02 12:05:23,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:05:23,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:24,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:05:24,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:24,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:05:24,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:05:24,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401496301] [2021-05-02 12:05:24,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401496301] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:24,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9712580] [2021-05-02 12:05:24,526 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:05:39,701 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2021-05-02 12:05:39,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:05:39,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-02 12:05:39,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:05:39,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:39,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:05:39,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9712580] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:39,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:05:39,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 47 [2021-05-02 12:05:39,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409029982] [2021-05-02 12:05:39,895 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-02 12:05:39,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:05:39,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-02 12:05:39,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 12:05:39,896 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand has 47 states, 47 states have (on average 2.0425531914893615) internal successors, (96), 46 states have internal predecessors, (96), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:40,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:05:40,050 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2021-05-02 12:05:40,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-02 12:05:40,050 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.0425531914893615) internal successors, (96), 46 states have internal predecessors, (96), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 96 [2021-05-02 12:05:40,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:05:40,051 INFO L225 Difference]: With dead ends: 106 [2021-05-02 12:05:40,051 INFO L226 Difference]: Without dead ends: 100 [2021-05-02 12:05:40,051 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 682.3ms TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 12:05:40,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-05-02 12:05:40,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2021-05-02 12:05:40,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.0106382978723405) internal successors, (95), 94 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:40,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2021-05-02 12:05:40,053 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2021-05-02 12:05:40,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:05:40,053 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2021-05-02 12:05:40,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 2.0425531914893615) internal successors, (96), 46 states have internal predecessors, (96), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:40,053 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2021-05-02 12:05:40,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-02 12:05:40,054 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:05:40,054 INFO L523 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:05:40,270 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:05:40,271 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:05:40,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:05:40,271 INFO L82 PathProgramCache]: Analyzing trace with hash -540395024, now seen corresponding path program 43 times [2021-05-02 12:05:40,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:05:40,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913325691] [2021-05-02 12:05:40,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:05:40,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:41,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:05:41,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:41,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:05:41,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:05:41,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913325691] [2021-05-02 12:05:41,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913325691] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:41,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621832258] [2021-05-02 12:05:41,036 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:05:41,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:41,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-02 12:05:41,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:05:41,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:41,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:05:41,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621832258] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:41,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:05:41,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 48 [2021-05-02 12:05:41,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765676003] [2021-05-02 12:05:41,258 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-02 12:05:41,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:05:41,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-02 12:05:41,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 12:05:41,258 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand has 48 states, 48 states have (on average 2.0416666666666665) internal successors, (98), 47 states have internal predecessors, (98), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:41,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:05:41,428 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2021-05-02 12:05:41,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-02 12:05:41,428 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0416666666666665) internal successors, (98), 47 states have internal predecessors, (98), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2021-05-02 12:05:41,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:05:41,429 INFO L225 Difference]: With dead ends: 108 [2021-05-02 12:05:41,429 INFO L226 Difference]: Without dead ends: 102 [2021-05-02 12:05:41,429 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 725.6ms TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 12:05:41,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-05-02 12:05:41,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2021-05-02 12:05:41,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.0104166666666667) internal successors, (97), 96 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:41,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2021-05-02 12:05:41,431 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2021-05-02 12:05:41,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:05:41,431 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2021-05-02 12:05:41,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.0416666666666665) internal successors, (98), 47 states have internal predecessors, (98), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:41,432 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2021-05-02 12:05:41,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-02 12:05:41,432 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:05:41,432 INFO L523 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:05:41,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:05:41,645 INFO L428 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:05:41,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:05:41,645 INFO L82 PathProgramCache]: Analyzing trace with hash -502662638, now seen corresponding path program 44 times [2021-05-02 12:05:41,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:05:41,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074159706] [2021-05-02 12:05:41,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:05:41,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:42,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:05:42,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:42,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:05:42,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:05:42,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074159706] [2021-05-02 12:05:42,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074159706] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:42,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619469971] [2021-05-02 12:05:42,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:05:42,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 12:05:42,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:05:42,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-02 12:05:42,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:05:42,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:42,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:05:42,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619469971] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:42,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:05:42,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47] total 49 [2021-05-02 12:05:42,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822390240] [2021-05-02 12:05:42,644 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-05-02 12:05:42,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:05:42,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-05-02 12:05:42,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 12:05:42,645 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand has 49 states, 49 states have (on average 2.0408163265306123) internal successors, (100), 48 states have internal predecessors, (100), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:42,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:05:42,824 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2021-05-02 12:05:42,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-02 12:05:42,824 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.0408163265306123) internal successors, (100), 48 states have internal predecessors, (100), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 100 [2021-05-02 12:05:42,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:05:42,825 INFO L225 Difference]: With dead ends: 110 [2021-05-02 12:05:42,825 INFO L226 Difference]: Without dead ends: 104 [2021-05-02 12:05:42,825 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 737.3ms TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 12:05:42,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-02 12:05:42,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2021-05-02 12:05:42,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.010204081632653) internal successors, (99), 98 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:42,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2021-05-02 12:05:42,827 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2021-05-02 12:05:42,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:05:42,828 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2021-05-02 12:05:42,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 2.0408163265306123) internal successors, (100), 48 states have internal predecessors, (100), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:42,828 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2021-05-02 12:05:42,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 12:05:42,828 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:05:42,828 INFO L523 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:05:43,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-02 12:05:43,029 INFO L428 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:05:43,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:05:43,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1398421940, now seen corresponding path program 45 times [2021-05-02 12:05:43,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:05:43,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933545014] [2021-05-02 12:05:43,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:05:43,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:43,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:05:43,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:43,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:05:43,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:05:43,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933545014] [2021-05-02 12:05:43,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933545014] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:43,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593104618] [2021-05-02 12:05:43,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:05:45,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2021-05-02 12:05:45,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:05:45,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-02 12:05:45,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:05:45,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:45,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:05:45,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593104618] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:45,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:05:45,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48] total 50 [2021-05-02 12:05:45,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416839117] [2021-05-02 12:05:45,830 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-02 12:05:45,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:05:45,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-02 12:05:45,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 12:05:45,831 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand has 50 states, 50 states have (on average 2.04) internal successors, (102), 49 states have internal predecessors, (102), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:45,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:05:45,957 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2021-05-02 12:05:45,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-02 12:05:45,958 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.04) internal successors, (102), 49 states have internal predecessors, (102), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2021-05-02 12:05:45,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:05:45,958 INFO L225 Difference]: With dead ends: 112 [2021-05-02 12:05:45,958 INFO L226 Difference]: Without dead ends: 106 [2021-05-02 12:05:45,959 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 768.5ms TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 12:05:45,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-02 12:05:45,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2021-05-02 12:05:45,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.01) internal successors, (101), 100 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:45,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2021-05-02 12:05:45,961 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2021-05-02 12:05:45,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:05:45,961 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2021-05-02 12:05:45,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.04) internal successors, (102), 49 states have internal predecessors, (102), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:45,961 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2021-05-02 12:05:45,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-02 12:05:45,961 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:05:45,962 INFO L523 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:05:46,165 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-02 12:05:46,166 INFO L428 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:05:46,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:05:46,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1315366698, now seen corresponding path program 46 times [2021-05-02 12:05:46,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:05:46,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661046143] [2021-05-02 12:05:46,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:05:46,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:47,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:05:47,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:47,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:05:47,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:05:47,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661046143] [2021-05-02 12:05:47,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661046143] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:47,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630905328] [2021-05-02 12:05:47,009 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:05:47,074 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 12:05:47,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:05:47,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-02 12:05:47,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:05:47,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:47,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:05:47,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630905328] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:47,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:05:47,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49] total 51 [2021-05-02 12:05:47,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569389853] [2021-05-02 12:05:47,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-02 12:05:47,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:05:47,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-02 12:05:47,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2021-05-02 12:05:47,248 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand has 51 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 50 states have internal predecessors, (104), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:47,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:05:47,420 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2021-05-02 12:05:47,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-02 12:05:47,420 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 50 states have internal predecessors, (104), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 104 [2021-05-02 12:05:47,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:05:47,421 INFO L225 Difference]: With dead ends: 114 [2021-05-02 12:05:47,421 INFO L226 Difference]: Without dead ends: 108 [2021-05-02 12:05:47,421 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 806.2ms TimeCoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2021-05-02 12:05:47,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-02 12:05:47,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2021-05-02 12:05:47,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.0098039215686274) internal successors, (103), 102 states have internal predecessors, (103), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:47,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2021-05-02 12:05:47,423 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2021-05-02 12:05:47,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:05:47,423 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2021-05-02 12:05:47,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 50 states have internal predecessors, (104), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:47,423 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2021-05-02 12:05:47,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-05-02 12:05:47,424 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:05:47,424 INFO L523 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:05:47,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-05-02 12:05:47,637 INFO L428 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:05:47,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:05:47,637 INFO L82 PathProgramCache]: Analyzing trace with hash 2073868152, now seen corresponding path program 47 times [2021-05-02 12:05:47,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:05:47,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914221871] [2021-05-02 12:05:47,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:05:47,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:48,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:05:48,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:48,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:05:48,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:05:48,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914221871] [2021-05-02 12:05:48,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914221871] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:48,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45244222] [2021-05-02 12:05:48,519 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:06:34,021 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2021-05-02 12:06:34,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:06:34,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-02 12:06:34,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:06:34,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:34,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:06:34,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45244222] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:06:34,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:06:34,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50] total 52 [2021-05-02 12:06:34,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279357972] [2021-05-02 12:06:34,223 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-05-02 12:06:34,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:06:34,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-05-02 12:06:34,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 12:06:34,224 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand has 52 states, 52 states have (on average 2.0384615384615383) internal successors, (106), 51 states have internal predecessors, (106), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:06:34,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:06:34,430 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2021-05-02 12:06:34,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-02 12:06:34,431 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.0384615384615383) internal successors, (106), 51 states have internal predecessors, (106), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 106 [2021-05-02 12:06:34,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:06:34,431 INFO L225 Difference]: With dead ends: 116 [2021-05-02 12:06:34,431 INFO L226 Difference]: Without dead ends: 110 [2021-05-02 12:06:34,432 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 843.5ms TimeCoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 12:06:34,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-02 12:06:34,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2021-05-02 12:06:34,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.0096153846153846) internal successors, (105), 104 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:06:34,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2021-05-02 12:06:34,434 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2021-05-02 12:06:34,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:06:34,434 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2021-05-02 12:06:34,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 2.0384615384615383) internal successors, (106), 51 states have internal predecessors, (106), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:06:34,434 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2021-05-02 12:06:34,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-05-02 12:06:34,435 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:06:34,435 INFO L523 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:06:34,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:06:34,653 INFO L428 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:06:34,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:06:34,653 INFO L82 PathProgramCache]: Analyzing trace with hash -751618662, now seen corresponding path program 48 times [2021-05-02 12:06:34,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:06:34,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936598325] [2021-05-02 12:06:34,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:06:34,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:06:35,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:06:35,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:06:35,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:06:35,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:06:35,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936598325] [2021-05-02 12:06:35,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936598325] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:06:35,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060299351] [2021-05-02 12:06:35,585 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:07:20,697 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2021-05-02 12:07:20,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:07:20,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-02 12:07:20,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:07:20,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:20,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:07:20,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060299351] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:07:20,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:07:20,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51] total 53 [2021-05-02 12:07:20,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894972370] [2021-05-02 12:07:20,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-05-02 12:07:20,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:07:20,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-05-02 12:07:20,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 12:07:20,931 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand has 53 states, 53 states have (on average 2.0377358490566038) internal successors, (108), 52 states have internal predecessors, (108), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:07:21,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:07:21,121 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2021-05-02 12:07:21,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-02 12:07:21,122 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.0377358490566038) internal successors, (108), 52 states have internal predecessors, (108), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 108 [2021-05-02 12:07:21,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:07:21,122 INFO L225 Difference]: With dead ends: 118 [2021-05-02 12:07:21,122 INFO L226 Difference]: Without dead ends: 112 [2021-05-02 12:07:21,123 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 883.5ms TimeCoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 12:07:21,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-05-02 12:07:21,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2021-05-02 12:07:21,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.009433962264151) internal successors, (107), 106 states have internal predecessors, (107), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:07:21,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2021-05-02 12:07:21,125 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2021-05-02 12:07:21,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:07:21,125 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2021-05-02 12:07:21,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 2.0377358490566038) internal successors, (108), 52 states have internal predecessors, (108), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:07:21,125 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2021-05-02 12:07:21,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-02 12:07:21,126 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:07:21,126 INFO L523 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:07:21,342 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-05-02 12:07:21,342 INFO L428 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:07:21,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:07:21,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1625115844, now seen corresponding path program 49 times [2021-05-02 12:07:21,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:07:21,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243732066] [2021-05-02 12:07:21,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:07:21,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:07:22,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:07:22,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:07:22,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:07:22,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:07:22,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243732066] [2021-05-02 12:07:22,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243732066] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:07:22,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392765981] [2021-05-02 12:07:22,362 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:07:22,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:07:22,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-02 12:07:22,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:07:22,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:22,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:07:22,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392765981] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:07:22,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:07:22,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52] total 54 [2021-05-02 12:07:22,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192121349] [2021-05-02 12:07:22,617 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-05-02 12:07:22,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:07:22,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-05-02 12:07:22,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 12:07:22,617 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand has 54 states, 54 states have (on average 2.037037037037037) internal successors, (110), 53 states have internal predecessors, (110), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:07:22,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:07:22,746 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2021-05-02 12:07:22,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-02 12:07:22,747 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.037037037037037) internal successors, (110), 53 states have internal predecessors, (110), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 110 [2021-05-02 12:07:22,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:07:22,747 INFO L225 Difference]: With dead ends: 120 [2021-05-02 12:07:22,747 INFO L226 Difference]: Without dead ends: 114 [2021-05-02 12:07:22,747 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 976.3ms TimeCoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 12:07:22,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-05-02 12:07:22,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2021-05-02 12:07:22,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.0092592592592593) internal successors, (109), 108 states have internal predecessors, (109), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:07:22,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2021-05-02 12:07:22,750 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2021-05-02 12:07:22,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:07:22,750 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2021-05-02 12:07:22,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.037037037037037) internal successors, (110), 53 states have internal predecessors, (110), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:07:22,750 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2021-05-02 12:07:22,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-05-02 12:07:22,750 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:07:22,750 INFO L523 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:07:22,968 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:07:22,969 INFO L428 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:07:22,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:07:22,969 INFO L82 PathProgramCache]: Analyzing trace with hash 757682270, now seen corresponding path program 50 times [2021-05-02 12:07:22,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:07:22,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679318676] [2021-05-02 12:07:22,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:07:22,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:07:23,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:07:23,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:07:23,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:07:23,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:07:23,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679318676] [2021-05-02 12:07:23,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679318676] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:07:23,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520486703] [2021-05-02 12:07:23,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:07:23,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 12:07:23,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:07:23,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-02 12:07:23,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:07:24,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:24,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:07:24,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520486703] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:07:24,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:07:24,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53] total 55 [2021-05-02 12:07:24,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320401008] [2021-05-02 12:07:24,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-05-02 12:07:24,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:07:24,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-05-02 12:07:24,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 12:07:24,165 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand has 55 states, 55 states have (on average 2.036363636363636) internal successors, (112), 54 states have internal predecessors, (112), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:07:24,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:07:24,350 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2021-05-02 12:07:24,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-02 12:07:24,351 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.036363636363636) internal successors, (112), 54 states have internal predecessors, (112), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 112 [2021-05-02 12:07:24,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:07:24,351 INFO L225 Difference]: With dead ends: 122 [2021-05-02 12:07:24,351 INFO L226 Difference]: Without dead ends: 116 [2021-05-02 12:07:24,352 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 909.4ms TimeCoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 12:07:24,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-02 12:07:24,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2021-05-02 12:07:24,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.009090909090909) internal successors, (111), 110 states have internal predecessors, (111), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:07:24,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2021-05-02 12:07:24,354 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2021-05-02 12:07:24,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:07:24,354 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2021-05-02 12:07:24,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 2.036363636363636) internal successors, (112), 54 states have internal predecessors, (112), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:07:24,354 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2021-05-02 12:07:24,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-05-02 12:07:24,355 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:07:24,355 INFO L523 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:07:24,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:07:24,569 INFO L428 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:07:24,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:07:24,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1409101056, now seen corresponding path program 51 times [2021-05-02 12:07:24,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:07:24,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104133507] [2021-05-02 12:07:24,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:07:24,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:07:25,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:07:25,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:07:25,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:07:25,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:07:25,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104133507] [2021-05-02 12:07:25,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104133507] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:07:25,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522027297] [2021-05-02 12:07:25,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:07:29,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2021-05-02 12:07:29,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:07:29,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-02 12:07:29,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:07:29,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:29,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:07:29,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522027297] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:07:29,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:07:29,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54] total 56 [2021-05-02 12:07:29,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359670117] [2021-05-02 12:07:29,786 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-05-02 12:07:29,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:07:29,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-05-02 12:07:29,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 12:07:29,787 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand has 56 states, 56 states have (on average 2.0357142857142856) internal successors, (114), 55 states have internal predecessors, (114), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:07:29,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:07:29,984 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2021-05-02 12:07:29,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-02 12:07:29,985 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0357142857142856) internal successors, (114), 55 states have internal predecessors, (114), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 114 [2021-05-02 12:07:29,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:07:29,985 INFO L225 Difference]: With dead ends: 124 [2021-05-02 12:07:29,986 INFO L226 Difference]: Without dead ends: 118 [2021-05-02 12:07:29,986 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 960.5ms TimeCoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 12:07:29,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-05-02 12:07:29,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2021-05-02 12:07:29,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.0089285714285714) internal successors, (113), 112 states have internal predecessors, (113), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:07:29,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2021-05-02 12:07:29,988 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2021-05-02 12:07:29,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:07:29,988 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2021-05-02 12:07:29,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 56 states, 56 states have (on average 2.0357142857142856) internal successors, (114), 55 states have internal predecessors, (114), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:07:29,988 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2021-05-02 12:07:29,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-02 12:07:29,988 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:07:29,989 INFO L523 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:07:30,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-05-02 12:07:30,197 INFO L428 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:07:30,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:07:30,197 INFO L82 PathProgramCache]: Analyzing trace with hash 357329186, now seen corresponding path program 52 times [2021-05-02 12:07:30,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:07:30,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964084514] [2021-05-02 12:07:30,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:07:30,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:07:31,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:07:31,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:07:31,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:07:31,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:07:31,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964084514] [2021-05-02 12:07:31,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964084514] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:07:31,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886422346] [2021-05-02 12:07:31,212 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:07:31,283 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 12:07:31,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:07:31,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 54 conjunts are in the unsatisfiable core [2021-05-02 12:07:31,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:07:31,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:31,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:07:31,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886422346] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:07:31,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:07:31,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55] total 57 [2021-05-02 12:07:31,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12371541] [2021-05-02 12:07:31,471 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-05-02 12:07:31,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:07:31,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-05-02 12:07:31,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2021-05-02 12:07:31,472 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand has 57 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 56 states have internal predecessors, (116), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:07:31,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:07:31,683 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2021-05-02 12:07:31,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-02 12:07:31,684 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 56 states have internal predecessors, (116), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 116 [2021-05-02 12:07:31,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:07:31,684 INFO L225 Difference]: With dead ends: 126 [2021-05-02 12:07:31,684 INFO L226 Difference]: Without dead ends: 120 [2021-05-02 12:07:31,685 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 974.8ms TimeCoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2021-05-02 12:07:31,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-05-02 12:07:31,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2021-05-02 12:07:31,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.0087719298245614) internal successors, (115), 114 states have internal predecessors, (115), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:07:31,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2021-05-02 12:07:31,687 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2021-05-02 12:07:31,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:07:31,687 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2021-05-02 12:07:31,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 56 states have internal predecessors, (116), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:07:31,687 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2021-05-02 12:07:31,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-05-02 12:07:31,687 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:07:31,687 INFO L523 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:07:31,903 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:07:31,903 INFO L428 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:07:31,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:07:31,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1078123324, now seen corresponding path program 53 times [2021-05-02 12:07:31,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:07:31,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243787644] [2021-05-02 12:07:31,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:07:31,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:07:32,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:07:32,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:07:32,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:07:32,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:07:32,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243787644] [2021-05-02 12:07:32,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243787644] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:07:32,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565138148] [2021-05-02 12:07:32,965 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:10:03,900 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2021-05-02 12:10:03,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:10:04,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 55 conjunts are in the unsatisfiable core [2021-05-02 12:10:04,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:10:04,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:04,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:10:04,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565138148] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:10:04,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:10:04,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56] total 58 [2021-05-02 12:10:04,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453513500] [2021-05-02 12:10:04,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-05-02 12:10:04,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:10:04,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-05-02 12:10:04,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 12:10:04,199 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand has 58 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 57 states have internal predecessors, (118), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:10:04,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:10:04,399 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2021-05-02 12:10:04,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-02 12:10:04,399 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 57 states have internal predecessors, (118), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 118 [2021-05-02 12:10:04,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:10:04,400 INFO L225 Difference]: With dead ends: 128 [2021-05-02 12:10:04,400 INFO L226 Difference]: Without dead ends: 122 [2021-05-02 12:10:04,400 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 1022.1ms TimeCoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 12:10:04,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-05-02 12:10:04,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2021-05-02 12:10:04,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.0086206896551724) internal successors, (117), 116 states have internal predecessors, (117), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:10:04,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2021-05-02 12:10:04,402 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2021-05-02 12:10:04,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:10:04,403 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2021-05-02 12:10:04,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 57 states have internal predecessors, (118), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:10:04,403 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2021-05-02 12:10:04,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-05-02 12:10:04,403 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:10:04,403 INFO L523 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:10:04,603 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-05-02 12:10:04,604 INFO L428 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:10:04,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:10:04,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1863483418, now seen corresponding path program 54 times [2021-05-02 12:10:04,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:10:04,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094663396] [2021-05-02 12:10:04,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:10:04,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:10:05,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:10:05,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:10:05,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:10:05,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:10:05,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094663396] [2021-05-02 12:10:05,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094663396] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:10:05,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404598616] [2021-05-02 12:10:05,739 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:10:41,280 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2021-05-02 12:10:41,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:10:41,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 56 conjunts are in the unsatisfiable core [2021-05-02 12:10:41,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:10:41,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:41,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:10:41,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404598616] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:10:41,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:10:41,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57] total 59 [2021-05-02 12:10:41,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954859348] [2021-05-02 12:10:41,517 INFO L460 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-05-02 12:10:41,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:10:41,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-05-02 12:10:41,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2021-05-02 12:10:41,518 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand has 59 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 58 states have internal predecessors, (120), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:10:41,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:10:41,714 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2021-05-02 12:10:41,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-02 12:10:41,715 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 58 states have internal predecessors, (120), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 120 [2021-05-02 12:10:41,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:10:41,715 INFO L225 Difference]: With dead ends: 130 [2021-05-02 12:10:41,715 INFO L226 Difference]: Without dead ends: 124 [2021-05-02 12:10:41,716 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 1092.7ms TimeCoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2021-05-02 12:10:41,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-05-02 12:10:41,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2021-05-02 12:10:41,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.0084745762711864) internal successors, (119), 118 states have internal predecessors, (119), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:10:41,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2021-05-02 12:10:41,718 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2021-05-02 12:10:41,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:10:41,718 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2021-05-02 12:10:41,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 59 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 58 states have internal predecessors, (120), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:10:41,718 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2021-05-02 12:10:41,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-02 12:10:41,718 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:10:41,718 INFO L523 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:10:41,933 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-05-02 12:10:41,933 INFO L428 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:10:41,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:10:41,933 INFO L82 PathProgramCache]: Analyzing trace with hash -680289656, now seen corresponding path program 55 times [2021-05-02 12:10:41,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:10:41,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575489584] [2021-05-02 12:10:41,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:10:41,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:10:43,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:10:43,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:10:43,097 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:10:43,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:10:43,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575489584] [2021-05-02 12:10:43,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575489584] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:10:43,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639487827] [2021-05-02 12:10:43,097 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:10:43,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:10:43,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-02 12:10:43,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:10:43,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:43,358 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:10:43,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639487827] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:10:43,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:10:43,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 58] total 60 [2021-05-02 12:10:43,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332487700] [2021-05-02 12:10:43,359 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-05-02 12:10:43,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:10:43,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-05-02 12:10:43,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2021-05-02 12:10:43,359 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand has 60 states, 60 states have (on average 2.033333333333333) internal successors, (122), 59 states have internal predecessors, (122), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:10:43,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:10:43,482 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2021-05-02 12:10:43,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-02 12:10:43,483 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.033333333333333) internal successors, (122), 59 states have internal predecessors, (122), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 122 [2021-05-02 12:10:43,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:10:43,483 INFO L225 Difference]: With dead ends: 132 [2021-05-02 12:10:43,483 INFO L226 Difference]: Without dead ends: 126 [2021-05-02 12:10:43,484 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1105.5ms TimeCoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2021-05-02 12:10:43,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-05-02 12:10:43,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2021-05-02 12:10:43,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.0083333333333333) internal successors, (121), 120 states have internal predecessors, (121), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:10:43,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2021-05-02 12:10:43,486 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2021-05-02 12:10:43,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:10:43,486 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2021-05-02 12:10:43,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 60 states, 60 states have (on average 2.033333333333333) internal successors, (122), 59 states have internal predecessors, (122), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:10:43,486 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2021-05-02 12:10:43,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-05-02 12:10:43,487 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:10:43,487 INFO L523 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:10:43,700 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:10:43,701 INFO L428 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:10:43,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:10:43,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1797417814, now seen corresponding path program 56 times [2021-05-02 12:10:43,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:10:43,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070127356] [2021-05-02 12:10:43,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:10:43,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:10:44,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:10:44,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:10:44,889 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:10:44,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:10:44,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070127356] [2021-05-02 12:10:44,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070127356] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:10:44,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701243556] [2021-05-02 12:10:44,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:10:44,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 12:10:44,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:10:44,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 58 conjunts are in the unsatisfiable core [2021-05-02 12:10:44,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:10:44,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:44,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:44,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:44,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:44,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:44,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:44,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:44,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:44,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:44,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:44,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:44,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:44,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:44,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:44,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:44,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:45,156 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:10:45,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701243556] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:10:45,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:10:45,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 59] total 61 [2021-05-02 12:10:45,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43145905] [2021-05-02 12:10:45,157 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-05-02 12:10:45,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:10:45,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-05-02 12:10:45,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2021-05-02 12:10:45,158 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand has 61 states, 61 states have (on average 2.0327868852459017) internal successors, (124), 60 states have internal predecessors, (124), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:10:45,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:10:45,354 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2021-05-02 12:10:45,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-02 12:10:45,354 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.0327868852459017) internal successors, (124), 60 states have internal predecessors, (124), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 124 [2021-05-02 12:10:45,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:10:45,355 INFO L225 Difference]: With dead ends: 134 [2021-05-02 12:10:45,355 INFO L226 Difference]: Without dead ends: 128 [2021-05-02 12:10:45,355 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 1147.3ms TimeCoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2021-05-02 12:10:45,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-05-02 12:10:45,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2021-05-02 12:10:45,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.0081967213114753) internal successors, (123), 122 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:10:45,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2021-05-02 12:10:45,357 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2021-05-02 12:10:45,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:10:45,357 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2021-05-02 12:10:45,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 61 states, 61 states have (on average 2.0327868852459017) internal successors, (124), 60 states have internal predecessors, (124), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:10:45,357 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2021-05-02 12:10:45,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-05-02 12:10:45,358 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:10:45,358 INFO L523 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:10:45,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-05-02 12:10:45,573 INFO L428 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:10:45,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:10:45,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1615753652, now seen corresponding path program 57 times [2021-05-02 12:10:45,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:10:45,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755887127] [2021-05-02 12:10:45,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:10:45,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:10:46,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:10:46,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:10:46,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:10:46,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:10:46,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755887127] [2021-05-02 12:10:46,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755887127] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:10:46,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858697361] [2021-05-02 12:10:46,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:10:55,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2021-05-02 12:10:55,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:10:55,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 59 conjunts are in the unsatisfiable core [2021-05-02 12:10:55,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:10:55,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:55,248 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:10:55,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858697361] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:10:55,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:10:55,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60] total 62 [2021-05-02 12:10:55,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102634341] [2021-05-02 12:10:55,249 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-05-02 12:10:55,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:10:55,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-05-02 12:10:55,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2021-05-02 12:10:55,249 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand has 62 states, 62 states have (on average 2.032258064516129) internal successors, (126), 61 states have internal predecessors, (126), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:10:55,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:10:55,467 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2021-05-02 12:10:55,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-02 12:10:55,468 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.032258064516129) internal successors, (126), 61 states have internal predecessors, (126), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 126 [2021-05-02 12:10:55,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:10:55,469 INFO L225 Difference]: With dead ends: 136 [2021-05-02 12:10:55,469 INFO L226 Difference]: Without dead ends: 130 [2021-05-02 12:10:55,469 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1207.5ms TimeCoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2021-05-02 12:10:55,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-05-02 12:10:55,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2021-05-02 12:10:55,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.0080645161290323) internal successors, (125), 124 states have internal predecessors, (125), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:10:55,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2021-05-02 12:10:55,471 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2021-05-02 12:10:55,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:10:55,471 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2021-05-02 12:10:55,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 62 states, 62 states have (on average 2.032258064516129) internal successors, (126), 61 states have internal predecessors, (126), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:10:55,471 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2021-05-02 12:10:55,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-05-02 12:10:55,472 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:10:55,472 INFO L523 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:10:55,684 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:10:55,685 INFO L428 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:10:55,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:10:55,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1164814190, now seen corresponding path program 58 times [2021-05-02 12:10:55,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:10:55,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886415279] [2021-05-02 12:10:55,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:10:55,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:10:56,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:10:56,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:10:56,951 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:10:56,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:10:56,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886415279] [2021-05-02 12:10:56,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886415279] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:10:56,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119867081] [2021-05-02 12:10:56,951 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:10:57,025 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 12:10:57,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:10:57,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 60 conjunts are in the unsatisfiable core [2021-05-02 12:10:57,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:10:57,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:57,232 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:10:57,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119867081] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:10:57,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:10:57,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 61] total 63 [2021-05-02 12:10:57,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185487041] [2021-05-02 12:10:57,233 INFO L460 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-05-02 12:10:57,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:10:57,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-05-02 12:10:57,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2021-05-02 12:10:57,234 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand has 63 states, 63 states have (on average 2.0317460317460316) internal successors, (128), 62 states have internal predecessors, (128), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:10:57,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:10:57,437 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2021-05-02 12:10:57,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-02 12:10:57,438 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.0317460317460316) internal successors, (128), 62 states have internal predecessors, (128), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 128 [2021-05-02 12:10:57,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:10:57,438 INFO L225 Difference]: With dead ends: 138 [2021-05-02 12:10:57,438 INFO L226 Difference]: Without dead ends: 132 [2021-05-02 12:10:57,439 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1216.4ms TimeCoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2021-05-02 12:10:57,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-05-02 12:10:57,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2021-05-02 12:10:57,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.007936507936508) internal successors, (127), 126 states have internal predecessors, (127), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:10:57,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2021-05-02 12:10:57,441 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2021-05-02 12:10:57,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:10:57,441 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2021-05-02 12:10:57,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 63 states, 63 states have (on average 2.0317460317460316) internal successors, (128), 62 states have internal predecessors, (128), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:10:57,441 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2021-05-02 12:10:57,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-02 12:10:57,441 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:10:57,441 INFO L523 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:10:57,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-05-02 12:10:57,657 INFO L428 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:10:57,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:10:57,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1820852240, now seen corresponding path program 59 times [2021-05-02 12:10:57,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:10:57,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716839507] [2021-05-02 12:10:57,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:10:57,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:10:58,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:10:58,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:10:58,951 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:10:58,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:10:58,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716839507] [2021-05-02 12:10:58,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716839507] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:10:58,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904892447] [2021-05-02 12:10:58,952 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:18:21,891 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2021-05-02 12:18:21,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:18:22,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 61 conjunts are in the unsatisfiable core [2021-05-02 12:18:22,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:18:22,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:18:22,234 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:18:22,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904892447] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:18:22,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:18:22,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 62] total 64 [2021-05-02 12:18:22,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926508178] [2021-05-02 12:18:22,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2021-05-02 12:18:22,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:18:22,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-05-02 12:18:22,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2021-05-02 12:18:22,235 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand has 64 states, 64 states have (on average 2.03125) internal successors, (130), 63 states have internal predecessors, (130), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:18:22,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:18:22,374 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2021-05-02 12:18:22,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-02 12:18:22,374 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.03125) internal successors, (130), 63 states have internal predecessors, (130), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 130 [2021-05-02 12:18:22,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:18:22,375 INFO L225 Difference]: With dead ends: 140 [2021-05-02 12:18:22,375 INFO L226 Difference]: Without dead ends: 134 [2021-05-02 12:18:22,376 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1252.4ms TimeCoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2021-05-02 12:18:22,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-05-02 12:18:22,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2021-05-02 12:18:22,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.0078125) internal successors, (129), 128 states have internal predecessors, (129), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:18:22,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2021-05-02 12:18:22,378 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2021-05-02 12:18:22,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:18:22,379 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2021-05-02 12:18:22,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 64 states, 64 states have (on average 2.03125) internal successors, (130), 63 states have internal predecessors, (130), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:18:22,379 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2021-05-02 12:18:22,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-05-02 12:18:22,379 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:18:22,379 INFO L523 BasicCegarLoop]: trace histogram [60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:18:22,600 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:18:22,601 INFO L428 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:18:22,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:18:22,601 INFO L82 PathProgramCache]: Analyzing trace with hash 913225778, now seen corresponding path program 60 times [2021-05-02 12:18:22,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:18:22,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884249372] [2021-05-02 12:18:22,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:18:22,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:18:23,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:18:23,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:18:23,937 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:18:23,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:18:23,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884249372] [2021-05-02 12:18:23,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884249372] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:18:23,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880872195] [2021-05-02 12:18:23,937 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true