/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loop-invgen/heapsort.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 18:07:23,202 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 18:07:23,204 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 18:07:23,235 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 18:07:23,279 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 18:07:23,279 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 18:07:23,280 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 18:07:23,283 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 18:07:23,298 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 18:07:23,298 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 18:07:23,301 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 18:07:23,301 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 18:07:23,301 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 18:07:23,301 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 18:07:23,301 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 18:07:23,301 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 18:07:23,301 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 18:07:23,301 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 18:07:23,302 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 18:07:23,302 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 18:07:23,302 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 18:07:23,302 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 18:07:23,303 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 18:07:23,303 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 18:07:23,303 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 18:07:23,303 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 18:07:23,303 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 18:07:23,303 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 18:07:23,303 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 18:07:23,304 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 18:07:23,304 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 18:07:23,665 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 18:07:23,702 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 18:07:23,704 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 18:07:23,704 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 18:07:23,705 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 18:07:23,706 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/heapsort.i [2021-05-02 18:07:23,798 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a5c776cb/3a12aa83ed4040ee843c11c02463b161/FLAG3f44aa7b7 [2021-05-02 18:07:24,315 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 18:07:24,316 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/heapsort.i [2021-05-02 18:07:24,334 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a5c776cb/3a12aa83ed4040ee843c11c02463b161/FLAG3f44aa7b7 [2021-05-02 18:07:24,635 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a5c776cb/3a12aa83ed4040ee843c11c02463b161 [2021-05-02 18:07:24,637 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 18:07:24,638 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 18:07:24,655 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 18:07:24,656 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 18:07:24,659 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 18:07:24,659 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 06:07:24" (1/1) ... [2021-05-02 18:07:24,660 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3553e2b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:07:24, skipping insertion in model container [2021-05-02 18:07:24,660 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 06:07:24" (1/1) ... [2021-05-02 18:07:24,666 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 18:07:24,691 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 18:07:24,896 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-invgen/heapsort.i[893,906] [2021-05-02 18:07:24,930 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 18:07:24,937 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 18:07:24,959 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-invgen/heapsort.i[893,906] [2021-05-02 18:07:24,977 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 18:07:25,003 INFO L208 MainTranslator]: Completed translation [2021-05-02 18:07:25,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:07:25 WrapperNode [2021-05-02 18:07:25,004 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 18:07:25,005 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 18:07:25,005 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 18:07:25,005 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 18:07:25,027 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:07:25" (1/1) ... [2021-05-02 18:07:25,027 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:07:25" (1/1) ... [2021-05-02 18:07:25,046 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:07:25" (1/1) ... [2021-05-02 18:07:25,046 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:07:25" (1/1) ... [2021-05-02 18:07:25,050 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:07:25" (1/1) ... [2021-05-02 18:07:25,053 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:07:25" (1/1) ... [2021-05-02 18:07:25,054 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:07:25" (1/1) ... [2021-05-02 18:07:25,066 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 18:07:25,066 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 18:07:25,066 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 18:07:25,066 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 18:07:25,067 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:07:25" (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 18:07:25,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 18:07:25,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 18:07:25,189 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 18:07:25,189 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 18:07:25,190 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 18:07:25,190 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 18:07:25,190 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 18:07:25,190 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 18:07:25,190 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 18:07:25,190 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 18:07:25,191 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 18:07:25,191 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 18:07:25,191 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 18:07:25,191 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 18:07:25,191 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 18:07:25,191 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 18:07:25,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 18:07:25,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 18:07:25,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 18:07:25,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 18:07:25,193 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 18:07:25,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 18:07:25,451 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 18:07:25,451 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 18:07:25,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:07:25 BoogieIcfgContainer [2021-05-02 18:07:25,452 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 18:07:25,453 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 18:07:25,453 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 18:07:25,453 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 18:07:25,455 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:07:25" (1/1) ... [2021-05-02 18:07:25,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 06:07:25 BasicIcfg [2021-05-02 18:07:25,481 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 18:07:25,482 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 18:07:25,482 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 18:07:25,484 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 18:07:25,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 06:07:24" (1/4) ... [2021-05-02 18:07:25,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@296a7d09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 06:07:25, skipping insertion in model container [2021-05-02 18:07:25,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:07:25" (2/4) ... [2021-05-02 18:07:25,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@296a7d09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 06:07:25, skipping insertion in model container [2021-05-02 18:07:25,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:07:25" (3/4) ... [2021-05-02 18:07:25,487 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@296a7d09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 06:07:25, skipping insertion in model container [2021-05-02 18:07:25,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 06:07:25" (4/4) ... [2021-05-02 18:07:25,488 INFO L111 eAbstractionObserver]: Analyzing ICFG heapsort.iJordan [2021-05-02 18:07:25,492 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 18:07:25,495 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 18:07:25,505 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 18:07:25,522 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 18:07:25,523 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 18:07:25,523 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 18:07:25,523 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 18:07:25,523 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 18:07:25,523 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 18:07:25,523 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 18:07:25,523 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 18:07:25,536 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 18:07:25,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 18:07:25,542 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:07:25,542 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:07:25,542 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:07:25,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:07:25,546 INFO L82 PathProgramCache]: Analyzing trace with hash -972496655, now seen corresponding path program 1 times [2021-05-02 18:07:25,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:07:25,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493819061] [2021-05-02 18:07:25,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:07:25,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:25,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:07:25,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:25,749 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 18:07:25,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:07:25,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493819061] [2021-05-02 18:07:25,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493819061] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:07:25,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:07:25,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 18:07:25,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733395785] [2021-05-02 18:07:25,758 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 18:07:25,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:07:25,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 18:07:25,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 18:07:25,769 INFO L87 Difference]: Start difference. First operand has 44 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 18:07:25,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:07:25,903 INFO L93 Difference]: Finished difference Result 44 states and 64 transitions. [2021-05-02 18:07:25,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 18:07:25,905 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 15 [2021-05-02 18:07:25,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:07:25,910 INFO L225 Difference]: With dead ends: 44 [2021-05-02 18:07:25,910 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 18:07:25,911 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 18:07:25,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 18:07:25,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-05-02 18:07:25,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 16 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 18:07:25,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 58 transitions. [2021-05-02 18:07:25,935 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 58 transitions. Word has length 15 [2021-05-02 18:07:25,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:07:25,935 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 58 transitions. [2021-05-02 18:07:25,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 18:07:25,935 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 58 transitions. [2021-05-02 18:07:25,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 18:07:25,936 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:07:25,936 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:07:25,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 18:07:25,936 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:07:25,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:07:25,937 INFO L82 PathProgramCache]: Analyzing trace with hash -943867504, now seen corresponding path program 1 times [2021-05-02 18:07:25,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:07:25,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658540738] [2021-05-02 18:07:25,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:07:25,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:26,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:07:26,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:26,011 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 18:07:26,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:07:26,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658540738] [2021-05-02 18:07:26,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658540738] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:07:26,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:07:26,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 18:07:26,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585887655] [2021-05-02 18:07:26,012 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 18:07:26,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:07:26,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 18:07:26,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 18:07:26,013 INFO L87 Difference]: Start difference. First operand 39 states and 58 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 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 18:07:26,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:07:26,236 INFO L93 Difference]: Finished difference Result 44 states and 62 transitions. [2021-05-02 18:07:26,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 18:07:26,237 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 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 15 [2021-05-02 18:07:26,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:07:26,238 INFO L225 Difference]: With dead ends: 44 [2021-05-02 18:07:26,238 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 18:07:26,239 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 97.5ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 18:07:26,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 18:07:26,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2021-05-02 18:07:26,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 16 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 18:07:26,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 61 transitions. [2021-05-02 18:07:26,263 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 61 transitions. Word has length 15 [2021-05-02 18:07:26,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:07:26,263 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 61 transitions. [2021-05-02 18:07:26,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 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 18:07:26,264 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 61 transitions. [2021-05-02 18:07:26,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 18:07:26,264 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:07:26,264 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:07:26,264 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 18:07:26,264 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:07:26,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:07:26,265 INFO L82 PathProgramCache]: Analyzing trace with hash -944820816, now seen corresponding path program 1 times [2021-05-02 18:07:26,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:07:26,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627852731] [2021-05-02 18:07:26,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:07:26,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:26,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:07:26,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:26,376 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 18:07:26,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:07:26,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627852731] [2021-05-02 18:07:26,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627852731] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:07:26,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:07:26,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 18:07:26,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109585247] [2021-05-02 18:07:26,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 18:07:26,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:07:26,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 18:07:26,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 18:07:26,379 INFO L87 Difference]: Start difference. First operand 43 states and 61 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 18:07:26,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:07:26,660 INFO L93 Difference]: Finished difference Result 69 states and 103 transitions. [2021-05-02 18:07:26,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 18:07:26,660 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 15 [2021-05-02 18:07:26,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:07:26,661 INFO L225 Difference]: With dead ends: 69 [2021-05-02 18:07:26,661 INFO L226 Difference]: Without dead ends: 69 [2021-05-02 18:07:26,662 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 91.1ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 18:07:26,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-02 18:07:26,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 47. [2021-05-02 18:07:26,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 16 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 18:07:26,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 64 transitions. [2021-05-02 18:07:26,667 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 64 transitions. Word has length 15 [2021-05-02 18:07:26,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:07:26,667 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 64 transitions. [2021-05-02 18:07:26,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 18:07:26,667 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 64 transitions. [2021-05-02 18:07:26,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 18:07:26,668 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:07:26,668 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:07:26,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 18:07:26,668 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:07:26,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:07:26,669 INFO L82 PathProgramCache]: Analyzing trace with hash -914285041, now seen corresponding path program 1 times [2021-05-02 18:07:26,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:07:26,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958687433] [2021-05-02 18:07:26,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:07:26,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:26,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:07:26,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:26,723 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 18:07:26,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:07:26,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958687433] [2021-05-02 18:07:26,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958687433] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:07:26,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:07:26,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 18:07:26,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366046445] [2021-05-02 18:07:26,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 18:07:26,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:07:26,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 18:07:26,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 18:07:26,724 INFO L87 Difference]: Start difference. First operand 47 states and 64 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 5 states have internal predecessors, (11), 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 18:07:27,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:07:27,084 INFO L93 Difference]: Finished difference Result 78 states and 113 transitions. [2021-05-02 18:07:27,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 18:07:27,085 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 5 states have internal predecessors, (11), 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 15 [2021-05-02 18:07:27,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:07:27,086 INFO L225 Difference]: With dead ends: 78 [2021-05-02 18:07:27,086 INFO L226 Difference]: Without dead ends: 78 [2021-05-02 18:07:27,086 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 126.8ms TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-05-02 18:07:27,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-02 18:07:27,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 73. [2021-05-02 18:07:27,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 39 states have internal predecessors, (51), 28 states have call successors, (28), 6 states have call predecessors, (28), 5 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-02 18:07:27,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 106 transitions. [2021-05-02 18:07:27,093 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 106 transitions. Word has length 15 [2021-05-02 18:07:27,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:07:27,093 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 106 transitions. [2021-05-02 18:07:27,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 5 states have internal predecessors, (11), 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 18:07:27,093 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 106 transitions. [2021-05-02 18:07:27,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 18:07:27,094 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:07:27,094 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:07:27,094 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 18:07:27,094 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:07:27,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:07:27,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1889400257, now seen corresponding path program 1 times [2021-05-02 18:07:27,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:07:27,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11313960] [2021-05-02 18:07:27,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:07:27,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:27,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:07:27,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:27,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 18:07:27,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:27,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:07:27,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:07:27,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11313960] [2021-05-02 18:07:27,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11313960] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:07:27,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:07:27,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 18:07:27,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217645869] [2021-05-02 18:07:27,154 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 18:07:27,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:07:27,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 18:07:27,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 18:07:27,155 INFO L87 Difference]: Start difference. First operand 73 states and 106 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 18:07:27,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:07:27,332 INFO L93 Difference]: Finished difference Result 77 states and 109 transitions. [2021-05-02 18:07:27,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 18:07:27,332 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-02 18:07:27,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:07:27,333 INFO L225 Difference]: With dead ends: 77 [2021-05-02 18:07:27,333 INFO L226 Difference]: Without dead ends: 77 [2021-05-02 18:07:27,334 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 77.9ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 18:07:27,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-02 18:07:27,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-05-02 18:07:27,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 42 states have (on average 1.2857142857142858) internal successors, (54), 42 states have internal predecessors, (54), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-02 18:07:27,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 109 transitions. [2021-05-02 18:07:27,340 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 109 transitions. Word has length 20 [2021-05-02 18:07:27,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:07:27,340 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 109 transitions. [2021-05-02 18:07:27,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 18:07:27,340 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 109 transitions. [2021-05-02 18:07:27,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 18:07:27,341 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:07:27,341 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:07:27,341 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-02 18:07:27,341 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:07:27,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:07:27,342 INFO L82 PathProgramCache]: Analyzing trace with hash -403505695, now seen corresponding path program 1 times [2021-05-02 18:07:27,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:07:27,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606550374] [2021-05-02 18:07:27,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:07:27,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:27,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:07:27,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:27,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 18:07:27,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:27,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:07:27,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:07:27,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606550374] [2021-05-02 18:07:27,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606550374] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:07:27,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:07:27,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 18:07:27,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678321619] [2021-05-02 18:07:27,420 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 18:07:27,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:07:27,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 18:07:27,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 18:07:27,421 INFO L87 Difference]: Start difference. First operand 77 states and 109 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 18:07:27,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:07:27,850 INFO L93 Difference]: Finished difference Result 179 states and 281 transitions. [2021-05-02 18:07:27,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 18:07:27,851 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-02 18:07:27,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:07:27,852 INFO L225 Difference]: With dead ends: 179 [2021-05-02 18:07:27,852 INFO L226 Difference]: Without dead ends: 179 [2021-05-02 18:07:27,853 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 134.4ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-05-02 18:07:27,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-05-02 18:07:27,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 177. [2021-05-02 18:07:27,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 88 states have (on average 1.3636363636363635) internal successors, (120), 90 states have internal predecessors, (120), 80 states have call successors, (80), 9 states have call predecessors, (80), 8 states have return successors, (79), 77 states have call predecessors, (79), 79 states have call successors, (79) [2021-05-02 18:07:27,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 279 transitions. [2021-05-02 18:07:27,864 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 279 transitions. Word has length 20 [2021-05-02 18:07:27,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:07:27,864 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 279 transitions. [2021-05-02 18:07:27,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 18:07:27,865 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 279 transitions. [2021-05-02 18:07:27,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 18:07:27,865 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:07:27,865 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:07:27,866 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-02 18:07:27,866 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:07:27,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:07:27,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1922571531, now seen corresponding path program 1 times [2021-05-02 18:07:27,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:07:27,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276419717] [2021-05-02 18:07:27,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:07:27,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:27,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:07:27,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:27,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 18:07:27,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:27,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:07:27,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:07:27,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276419717] [2021-05-02 18:07:27,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276419717] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:07:27,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:07:27,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 18:07:27,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844571796] [2021-05-02 18:07:27,919 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 18:07:27,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:07:27,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 18:07:27,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 18:07:27,919 INFO L87 Difference]: Start difference. First operand 177 states and 279 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 18:07:28,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:07:28,310 INFO L93 Difference]: Finished difference Result 300 states and 494 transitions. [2021-05-02 18:07:28,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 18:07:28,311 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-02 18:07:28,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:07:28,314 INFO L225 Difference]: With dead ends: 300 [2021-05-02 18:07:28,314 INFO L226 Difference]: Without dead ends: 300 [2021-05-02 18:07:28,314 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 108.5ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-05-02 18:07:28,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-05-02 18:07:28,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 261. [2021-05-02 18:07:28,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 121 states have (on average 1.4297520661157024) internal successors, (173), 128 states have internal predecessors, (173), 130 states have call successors, (130), 10 states have call predecessors, (130), 9 states have return successors, (129), 122 states have call predecessors, (129), 129 states have call successors, (129) [2021-05-02 18:07:28,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 432 transitions. [2021-05-02 18:07:28,328 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 432 transitions. Word has length 20 [2021-05-02 18:07:28,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:07:28,328 INFO L480 AbstractCegarLoop]: Abstraction has 261 states and 432 transitions. [2021-05-02 18:07:28,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 18:07:28,329 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 432 transitions. [2021-05-02 18:07:28,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 18:07:28,329 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:07:28,329 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:07:28,329 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-02 18:07:28,329 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:07:28,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:07:28,330 INFO L82 PathProgramCache]: Analyzing trace with hash -696908702, now seen corresponding path program 1 times [2021-05-02 18:07:28,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:07:28,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604938859] [2021-05-02 18:07:28,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:07:28,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:28,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:07:28,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:28,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 18:07:28,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:28,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:07:28,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:07:28,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604938859] [2021-05-02 18:07:28,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604938859] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:07:28,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:07:28,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 18:07:28,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731466007] [2021-05-02 18:07:28,359 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 18:07:28,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:07:28,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 18:07:28,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 18:07:28,360 INFO L87 Difference]: Start difference. First operand 261 states and 432 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 18:07:28,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:07:28,490 INFO L93 Difference]: Finished difference Result 217 states and 350 transitions. [2021-05-02 18:07:28,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 18:07:28,490 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-02 18:07:28,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:07:28,492 INFO L225 Difference]: With dead ends: 217 [2021-05-02 18:07:28,492 INFO L226 Difference]: Without dead ends: 217 [2021-05-02 18:07:28,492 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 18:07:28,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-05-02 18:07:28,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2021-05-02 18:07:28,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 103 states have (on average 1.3883495145631068) internal successors, (143), 109 states have internal predecessors, (143), 104 states have call successors, (104), 10 states have call predecessors, (104), 9 states have return successors, (103), 97 states have call predecessors, (103), 103 states have call successors, (103) [2021-05-02 18:07:28,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 350 transitions. [2021-05-02 18:07:28,501 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 350 transitions. Word has length 20 [2021-05-02 18:07:28,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:07:28,501 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 350 transitions. [2021-05-02 18:07:28,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 18:07:28,501 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 350 transitions. [2021-05-02 18:07:28,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 18:07:28,502 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:07:28,502 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:07:28,502 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-02 18:07:28,502 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:07:28,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:07:28,502 INFO L82 PathProgramCache]: Analyzing trace with hash 2078992758, now seen corresponding path program 1 times [2021-05-02 18:07:28,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:07:28,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067083063] [2021-05-02 18:07:28,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:07:28,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:28,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:07:28,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:28,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 18:07:28,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:28,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:07:28,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:07:28,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067083063] [2021-05-02 18:07:28,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067083063] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:07:28,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:07:28,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 18:07:28,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451207395] [2021-05-02 18:07:28,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 18:07:28,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:07:28,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 18:07:28,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 18:07:28,541 INFO L87 Difference]: Start difference. First operand 217 states and 350 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 18:07:28,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:07:28,663 INFO L93 Difference]: Finished difference Result 196 states and 312 transitions. [2021-05-02 18:07:28,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 18:07:28,663 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-02 18:07:28,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:07:28,664 INFO L225 Difference]: With dead ends: 196 [2021-05-02 18:07:28,665 INFO L226 Difference]: Without dead ends: 195 [2021-05-02 18:07:28,665 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 46.2ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-02 18:07:28,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-05-02 18:07:28,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 187. [2021-05-02 18:07:28,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 90 states have (on average 1.3888888888888888) internal successors, (125), 94 states have internal predecessors, (125), 88 states have call successors, (88), 9 states have call predecessors, (88), 8 states have return successors, (87), 83 states have call predecessors, (87), 87 states have call successors, (87) [2021-05-02 18:07:28,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 300 transitions. [2021-05-02 18:07:28,672 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 300 transitions. Word has length 20 [2021-05-02 18:07:28,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:07:28,672 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 300 transitions. [2021-05-02 18:07:28,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 18:07:28,672 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 300 transitions. [2021-05-02 18:07:28,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 18:07:28,673 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:07:28,673 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:07:28,673 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-02 18:07:28,673 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:07:28,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:07:28,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1238440984, now seen corresponding path program 1 times [2021-05-02 18:07:28,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:07:28,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761669645] [2021-05-02 18:07:28,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:07:28,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:28,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:07:28,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:28,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 18:07:28,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:28,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-05-02 18:07:28,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:28,718 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 18:07:28,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:07:28,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761669645] [2021-05-02 18:07:28,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761669645] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:07:28,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:07:28,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 18:07:28,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122977672] [2021-05-02 18:07:28,719 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 18:07:28,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:07:28,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 18:07:28,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 18:07:28,720 INFO L87 Difference]: Start difference. First operand 187 states and 300 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 18:07:29,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:07:29,066 INFO L93 Difference]: Finished difference Result 219 states and 350 transitions. [2021-05-02 18:07:29,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 18:07:29,066 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2021-05-02 18:07:29,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:07:29,068 INFO L225 Difference]: With dead ends: 219 [2021-05-02 18:07:29,068 INFO L226 Difference]: Without dead ends: 219 [2021-05-02 18:07:29,068 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 108.6ms TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-05-02 18:07:29,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-05-02 18:07:29,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 201. [2021-05-02 18:07:29,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 97 states have (on average 1.3814432989690721) internal successors, (134), 103 states have internal predecessors, (134), 94 states have call successors, (94), 10 states have call predecessors, (94), 9 states have return successors, (93), 87 states have call predecessors, (93), 93 states have call successors, (93) [2021-05-02 18:07:29,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 321 transitions. [2021-05-02 18:07:29,075 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 321 transitions. Word has length 27 [2021-05-02 18:07:29,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:07:29,075 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 321 transitions. [2021-05-02 18:07:29,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 18:07:29,075 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 321 transitions. [2021-05-02 18:07:29,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 18:07:29,076 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:07:29,076 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:07:29,076 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-02 18:07:29,076 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:07:29,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:07:29,077 INFO L82 PathProgramCache]: Analyzing trace with hash 511466180, now seen corresponding path program 1 times [2021-05-02 18:07:29,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:07:29,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137449437] [2021-05-02 18:07:29,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:07:29,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:29,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:07:29,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:29,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 18:07:29,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:29,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-05-02 18:07:29,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:29,121 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 18:07:29,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:07:29,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137449437] [2021-05-02 18:07:29,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137449437] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:07:29,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:07:29,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 18:07:29,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370432062] [2021-05-02 18:07:29,122 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 18:07:29,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:07:29,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 18:07:29,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-02 18:07:29,122 INFO L87 Difference]: Start difference. First operand 201 states and 321 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 18:07:29,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:07:29,380 INFO L93 Difference]: Finished difference Result 237 states and 381 transitions. [2021-05-02 18:07:29,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 18:07:29,381 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-05-02 18:07:29,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:07:29,382 INFO L225 Difference]: With dead ends: 237 [2021-05-02 18:07:29,382 INFO L226 Difference]: Without dead ends: 237 [2021-05-02 18:07:29,383 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 66.6ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-05-02 18:07:29,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-05-02 18:07:29,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 201. [2021-05-02 18:07:29,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 97 states have (on average 1.3608247422680413) internal successors, (132), 103 states have internal predecessors, (132), 94 states have call successors, (94), 10 states have call predecessors, (94), 9 states have return successors, (93), 87 states have call predecessors, (93), 93 states have call successors, (93) [2021-05-02 18:07:29,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 319 transitions. [2021-05-02 18:07:29,390 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 319 transitions. Word has length 29 [2021-05-02 18:07:29,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:07:29,390 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 319 transitions. [2021-05-02 18:07:29,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 18:07:29,391 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 319 transitions. [2021-05-02 18:07:29,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 18:07:29,391 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:07:29,391 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:07:29,391 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-02 18:07:29,391 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:07:29,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:07:29,392 INFO L82 PathProgramCache]: Analyzing trace with hash 810931569, now seen corresponding path program 1 times [2021-05-02 18:07:29,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:07:29,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692256358] [2021-05-02 18:07:29,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:07:29,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:29,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:07:29,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:29,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 18:07:29,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:29,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-05-02 18:07:29,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:29,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 18:07:29,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:29,441 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 18:07:29,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:07:29,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692256358] [2021-05-02 18:07:29,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692256358] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:07:29,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:07:29,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 18:07:29,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798432950] [2021-05-02 18:07:29,442 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 18:07:29,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:07:29,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 18:07:29,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 18:07:29,443 INFO L87 Difference]: Start difference. First operand 201 states and 319 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 18:07:29,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:07:29,784 INFO L93 Difference]: Finished difference Result 267 states and 422 transitions. [2021-05-02 18:07:29,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 18:07:29,785 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2021-05-02 18:07:29,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:07:29,787 INFO L225 Difference]: With dead ends: 267 [2021-05-02 18:07:29,787 INFO L226 Difference]: Without dead ends: 267 [2021-05-02 18:07:29,788 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 111.6ms TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-05-02 18:07:29,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-05-02 18:07:29,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 241. [2021-05-02 18:07:29,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 111 states have (on average 1.3513513513513513) internal successors, (150), 121 states have internal predecessors, (150), 118 states have call successors, (118), 12 states have call predecessors, (118), 11 states have return successors, (117), 107 states have call predecessors, (117), 117 states have call successors, (117) [2021-05-02 18:07:29,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 385 transitions. [2021-05-02 18:07:29,798 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 385 transitions. Word has length 30 [2021-05-02 18:07:29,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:07:29,799 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 385 transitions. [2021-05-02 18:07:29,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 18:07:29,799 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 385 transitions. [2021-05-02 18:07:29,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 18:07:29,802 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:07:29,802 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:07:29,802 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-02 18:07:29,802 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:07:29,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:07:29,802 INFO L82 PathProgramCache]: Analyzing trace with hash 573878194, now seen corresponding path program 1 times [2021-05-02 18:07:29,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:07:29,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083672561] [2021-05-02 18:07:29,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:07:29,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:29,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:07:29,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:29,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 18:07:29,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:29,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-05-02 18:07:29,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:29,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-05-02 18:07:29,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:29,881 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 18:07:29,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:07:29,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083672561] [2021-05-02 18:07:29,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083672561] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:07:29,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:07:29,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 18:07:29,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936272251] [2021-05-02 18:07:29,883 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 18:07:29,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:07:29,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 18:07:29,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 18:07:29,883 INFO L87 Difference]: Start difference. First operand 241 states and 385 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 18:07:30,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:07:30,198 INFO L93 Difference]: Finished difference Result 287 states and 458 transitions. [2021-05-02 18:07:30,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 18:07:30,198 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2021-05-02 18:07:30,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:07:30,199 INFO L225 Difference]: With dead ends: 287 [2021-05-02 18:07:30,200 INFO L226 Difference]: Without dead ends: 287 [2021-05-02 18:07:30,200 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 112.9ms TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-05-02 18:07:30,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-05-02 18:07:30,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 259. [2021-05-02 18:07:30,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 118 states have (on average 1.347457627118644) internal successors, (159), 130 states have internal predecessors, (159), 128 states have call successors, (128), 13 states have call predecessors, (128), 12 states have return successors, (127), 115 states have call predecessors, (127), 127 states have call successors, (127) [2021-05-02 18:07:30,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 414 transitions. [2021-05-02 18:07:30,207 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 414 transitions. Word has length 32 [2021-05-02 18:07:30,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:07:30,207 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 414 transitions. [2021-05-02 18:07:30,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 18:07:30,207 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 414 transitions. [2021-05-02 18:07:30,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 18:07:30,208 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:07:30,208 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:07:30,208 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-02 18:07:30,208 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:07:30,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:07:30,208 INFO L82 PathProgramCache]: Analyzing trace with hash 630142183, now seen corresponding path program 1 times [2021-05-02 18:07:30,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:07:30,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559141541] [2021-05-02 18:07:30,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:07:30,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:30,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:07:30,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:30,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 18:07:30,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:30,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-05-02 18:07:30,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:30,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 18:07:30,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:30,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-05-02 18:07:30,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:30,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-05-02 18:07:30,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:30,259 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 18:07:30,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:07:30,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559141541] [2021-05-02 18:07:30,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559141541] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:07:30,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:07:30,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 18:07:30,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202662277] [2021-05-02 18:07:30,260 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 18:07:30,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:07:30,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 18:07:30,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 18:07:30,260 INFO L87 Difference]: Start difference. First operand 259 states and 414 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 18:07:30,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:07:30,659 INFO L93 Difference]: Finished difference Result 307 states and 479 transitions. [2021-05-02 18:07:30,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 18:07:30,659 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2021-05-02 18:07:30,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:07:30,661 INFO L225 Difference]: With dead ends: 307 [2021-05-02 18:07:30,661 INFO L226 Difference]: Without dead ends: 307 [2021-05-02 18:07:30,661 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 133.8ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-05-02 18:07:30,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-05-02 18:07:30,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 267. [2021-05-02 18:07:30,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 124 states have (on average 1.3306451612903225) internal successors, (165), 136 states have internal predecessors, (165), 128 states have call successors, (128), 15 states have call predecessors, (128), 14 states have return successors, (127), 115 states have call predecessors, (127), 127 states have call successors, (127) [2021-05-02 18:07:30,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 420 transitions. [2021-05-02 18:07:30,668 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 420 transitions. Word has length 42 [2021-05-02 18:07:30,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:07:30,669 INFO L480 AbstractCegarLoop]: Abstraction has 267 states and 420 transitions. [2021-05-02 18:07:30,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 18:07:30,669 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 420 transitions. [2021-05-02 18:07:30,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 18:07:30,669 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:07:30,669 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:07:30,669 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-05-02 18:07:30,670 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:07:30,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:07:30,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1507674262, now seen corresponding path program 1 times [2021-05-02 18:07:30,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:07:30,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188498481] [2021-05-02 18:07:30,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:07:30,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:30,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:07:30,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:30,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 18:07:30,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:30,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-05-02 18:07:30,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:30,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-02 18:07:30,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:30,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-05-02 18:07:30,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:30,718 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 18:07:30,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:07:30,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188498481] [2021-05-02 18:07:30,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188498481] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:07:30,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:07:30,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 18:07:30,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447040752] [2021-05-02 18:07:30,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 18:07:30,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:07:30,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 18:07:30,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 18:07:30,719 INFO L87 Difference]: Start difference. First operand 267 states and 420 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 18:07:30,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:07:30,996 INFO L93 Difference]: Finished difference Result 271 states and 423 transitions. [2021-05-02 18:07:30,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 18:07:30,996 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2021-05-02 18:07:30,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:07:30,997 INFO L225 Difference]: With dead ends: 271 [2021-05-02 18:07:30,997 INFO L226 Difference]: Without dead ends: 271 [2021-05-02 18:07:30,997 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 163.7ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-05-02 18:07:30,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-05-02 18:07:31,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2021-05-02 18:07:31,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 127 states have (on average 1.3228346456692914) internal successors, (168), 139 states have internal predecessors, (168), 128 states have call successors, (128), 16 states have call predecessors, (128), 15 states have return successors, (127), 115 states have call predecessors, (127), 127 states have call successors, (127) [2021-05-02 18:07:31,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 423 transitions. [2021-05-02 18:07:31,005 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 423 transitions. Word has length 42 [2021-05-02 18:07:31,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:07:31,005 INFO L480 AbstractCegarLoop]: Abstraction has 271 states and 423 transitions. [2021-05-02 18:07:31,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 18:07:31,005 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 423 transitions. [2021-05-02 18:07:31,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 18:07:31,005 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:07:31,006 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:07:31,006 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-02 18:07:31,006 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:07:31,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:07:31,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1060746045, now seen corresponding path program 1 times [2021-05-02 18:07:31,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:07:31,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559683] [2021-05-02 18:07:31,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:07:31,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:31,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:07:31,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:31,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 18:07:31,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:31,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-05-02 18:07:31,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:31,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-02 18:07:31,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:31,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-05-02 18:07:31,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:31,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-05-02 18:07:31,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:31,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-05-02 18:07:31,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:31,059 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 18:07:31,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:07:31,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559683] [2021-05-02 18:07:31,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559683] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:07:31,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:07:31,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 18:07:31,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849668422] [2021-05-02 18:07:31,060 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 18:07:31,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:07:31,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 18:07:31,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 18:07:31,060 INFO L87 Difference]: Start difference. First operand 271 states and 423 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 18:07:31,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:07:31,369 INFO L93 Difference]: Finished difference Result 303 states and 470 transitions. [2021-05-02 18:07:31,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 18:07:31,370 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 54 [2021-05-02 18:07:31,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:07:31,371 INFO L225 Difference]: With dead ends: 303 [2021-05-02 18:07:31,371 INFO L226 Difference]: Without dead ends: 303 [2021-05-02 18:07:31,371 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 121.4ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-05-02 18:07:31,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-05-02 18:07:31,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 166. [2021-05-02 18:07:31,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 85 states have (on average 1.2470588235294118) internal successors, (106), 91 states have internal predecessors, (106), 66 states have call successors, (66), 15 states have call predecessors, (66), 14 states have return successors, (65), 59 states have call predecessors, (65), 65 states have call successors, (65) [2021-05-02 18:07:31,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 237 transitions. [2021-05-02 18:07:31,377 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 237 transitions. Word has length 54 [2021-05-02 18:07:31,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:07:31,377 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 237 transitions. [2021-05-02 18:07:31,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 18:07:31,377 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 237 transitions. [2021-05-02 18:07:31,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-02 18:07:31,378 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:07:31,378 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:07:31,378 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-05-02 18:07:31,378 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:07:31,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:07:31,378 INFO L82 PathProgramCache]: Analyzing trace with hash 2145008663, now seen corresponding path program 1 times [2021-05-02 18:07:31,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:07:31,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778233957] [2021-05-02 18:07:31,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:07:31,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:31,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:07:31,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:31,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 18:07:31,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:31,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-05-02 18:07:31,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:31,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-02 18:07:31,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:31,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-05-02 18:07:31,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:31,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-05-02 18:07:31,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:31,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-05-02 18:07:31,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:31,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-05-02 18:07:31,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:31,426 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-05-02 18:07:31,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:07:31,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778233957] [2021-05-02 18:07:31,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778233957] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:07:31,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036561770] [2021-05-02 18:07:31,426 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 18:07:31,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:31,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 18:07:31,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:07:31,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:31,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:31,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:31,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:31,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:31,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:31,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:31,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:31,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:31,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:31,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:31,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:31,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:31,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:31,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:31,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:31,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:31,643 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-05-02 18:07:31,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036561770] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:07:31,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:07:31,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 9 [2021-05-02 18:07:31,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341652215] [2021-05-02 18:07:31,644 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 18:07:31,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:07:31,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 18:07:31,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 18:07:31,645 INFO L87 Difference]: Start difference. First operand 166 states and 237 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 18:07:31,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:07:31,808 INFO L93 Difference]: Finished difference Result 263 states and 403 transitions. [2021-05-02 18:07:31,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 18:07:31,808 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 57 [2021-05-02 18:07:31,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:07:31,810 INFO L225 Difference]: With dead ends: 263 [2021-05-02 18:07:31,810 INFO L226 Difference]: Without dead ends: 253 [2021-05-02 18:07:31,810 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 73.6ms TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-05-02 18:07:31,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-05-02 18:07:31,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 217. [2021-05-02 18:07:31,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 104 states have (on average 1.2596153846153846) internal successors, (131), 112 states have internal predecessors, (131), 98 states have call successors, (98), 15 states have call predecessors, (98), 14 states have return successors, (97), 89 states have call predecessors, (97), 97 states have call successors, (97) [2021-05-02 18:07:31,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 326 transitions. [2021-05-02 18:07:31,825 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 326 transitions. Word has length 57 [2021-05-02 18:07:31,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:07:31,826 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 326 transitions. [2021-05-02 18:07:31,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 18:07:31,826 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 326 transitions. [2021-05-02 18:07:31,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-02 18:07:31,826 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:07:31,826 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:07:32,042 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 18:07:32,043 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:07:32,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:07:32,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1039189609, now seen corresponding path program 1 times [2021-05-02 18:07:32,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:07:32,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526839506] [2021-05-02 18:07:32,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:07:32,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:32,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:07:32,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:32,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 18:07:32,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:32,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-05-02 18:07:32,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:32,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-05-02 18:07:32,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:32,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-05-02 18:07:32,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:32,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-05-02 18:07:32,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:32,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-05-02 18:07:32,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:32,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-05-02 18:07:32,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:32,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-05-02 18:07:32,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:32,112 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-05-02 18:07:32,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:07:32,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526839506] [2021-05-02 18:07:32,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526839506] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:07:32,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645320845] [2021-05-02 18:07:32,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 18:07:32,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:32,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-02 18:07:32,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:07:32,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:32,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:32,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:32,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:32,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:32,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:32,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:32,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:32,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:32,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:32,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:32,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:32,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:32,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:32,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:32,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:32,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:32,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:32,395 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-05-02 18:07:32,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645320845] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:07:32,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:07:32,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-05-02 18:07:32,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185134003] [2021-05-02 18:07:32,396 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 18:07:32,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:07:32,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 18:07:32,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-02 18:07:32,397 INFO L87 Difference]: Start difference. First operand 217 states and 326 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 18:07:32,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:07:32,516 INFO L93 Difference]: Finished difference Result 376 states and 597 transitions. [2021-05-02 18:07:32,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 18:07:32,516 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 62 [2021-05-02 18:07:32,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:07:32,518 INFO L225 Difference]: With dead ends: 376 [2021-05-02 18:07:32,518 INFO L226 Difference]: Without dead ends: 366 [2021-05-02 18:07:32,518 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 73.4ms TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-05-02 18:07:32,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-05-02 18:07:32,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 340. [2021-05-02 18:07:32,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 153 states have (on average 1.3071895424836601) internal successors, (200), 166 states have internal predecessors, (200), 172 states have call successors, (172), 15 states have call predecessors, (172), 14 states have return successors, (171), 158 states have call predecessors, (171), 171 states have call successors, (171) [2021-05-02 18:07:32,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 543 transitions. [2021-05-02 18:07:32,527 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 543 transitions. Word has length 62 [2021-05-02 18:07:32,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:07:32,527 INFO L480 AbstractCegarLoop]: Abstraction has 340 states and 543 transitions. [2021-05-02 18:07:32,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 18:07:32,528 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 543 transitions. [2021-05-02 18:07:32,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-02 18:07:32,528 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:07:32,528 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:07:32,746 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 18:07:32,746 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:07:32,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:07:32,746 INFO L82 PathProgramCache]: Analyzing trace with hash 244508168, now seen corresponding path program 1 times [2021-05-02 18:07:32,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:07:32,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460776439] [2021-05-02 18:07:32,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:07:32,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:32,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:07:32,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:32,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 18:07:32,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:32,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-05-02 18:07:32,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:32,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 18:07:32,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:32,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-05-02 18:07:32,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:32,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-05-02 18:07:32,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:32,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-05-02 18:07:32,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:32,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-05-02 18:07:32,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:32,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-05-02 18:07:32,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:32,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-05-02 18:07:32,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:32,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-05-02 18:07:32,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:32,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-05-02 18:07:32,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:32,853 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-05-02 18:07:32,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:07:32,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460776439] [2021-05-02 18:07:32,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460776439] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:07:32,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269187971] [2021-05-02 18:07:32,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 18:07:32,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:32,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 18:07:32,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:07:32,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:32,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:32,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:32,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:32,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:32,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:32,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:32,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:32,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:32,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:33,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:33,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:33,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:33,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:33,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:33,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:33,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:33,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:33,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:33,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:33,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:33,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:33,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:33,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:33,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:33,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:33,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:33,126 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-05-02 18:07:33,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269187971] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:07:33,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:07:33,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2021-05-02 18:07:33,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577270127] [2021-05-02 18:07:33,127 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 18:07:33,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:07:33,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 18:07:33,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-02 18:07:33,128 INFO L87 Difference]: Start difference. First operand 340 states and 543 transitions. Second operand has 15 states, 14 states have (on average 2.857142857142857) internal successors, (40), 12 states have internal predecessors, (40), 5 states have call successors, (27), 4 states have call predecessors, (27), 1 states have return successors, (23), 5 states have call predecessors, (23), 5 states have call successors, (23) [2021-05-02 18:07:34,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:07:34,177 INFO L93 Difference]: Finished difference Result 467 states and 740 transitions. [2021-05-02 18:07:34,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 18:07:34,177 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.857142857142857) internal successors, (40), 12 states have internal predecessors, (40), 5 states have call successors, (27), 4 states have call predecessors, (27), 1 states have return successors, (23), 5 states have call predecessors, (23), 5 states have call successors, (23) Word has length 79 [2021-05-02 18:07:34,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:07:34,179 INFO L225 Difference]: With dead ends: 467 [2021-05-02 18:07:34,179 INFO L226 Difference]: Without dead ends: 467 [2021-05-02 18:07:34,180 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 309.2ms TimeCoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2021-05-02 18:07:34,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-05-02 18:07:34,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 350. [2021-05-02 18:07:34,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 160 states have (on average 1.29375) internal successors, (207), 173 states have internal predecessors, (207), 174 states have call successors, (174), 16 states have call predecessors, (174), 15 states have return successors, (173), 160 states have call predecessors, (173), 173 states have call successors, (173) [2021-05-02 18:07:34,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 554 transitions. [2021-05-02 18:07:34,191 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 554 transitions. Word has length 79 [2021-05-02 18:07:34,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:07:34,192 INFO L480 AbstractCegarLoop]: Abstraction has 350 states and 554 transitions. [2021-05-02 18:07:34,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.857142857142857) internal successors, (40), 12 states have internal predecessors, (40), 5 states have call successors, (27), 4 states have call predecessors, (27), 1 states have return successors, (23), 5 states have call predecessors, (23), 5 states have call successors, (23) [2021-05-02 18:07:34,192 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 554 transitions. [2021-05-02 18:07:34,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-05-02 18:07:34,193 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:07:34,193 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:07:34,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:07:34,408 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:07:34,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:07:34,409 INFO L82 PathProgramCache]: Analyzing trace with hash 544844568, now seen corresponding path program 1 times [2021-05-02 18:07:34,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:07:34,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449067571] [2021-05-02 18:07:34,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:07:34,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:34,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:07:34,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:34,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 18:07:34,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:34,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-05-02 18:07:34,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:34,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 18:07:34,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:34,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-05-02 18:07:34,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:34,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-05-02 18:07:34,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:34,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-05-02 18:07:34,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:34,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-05-02 18:07:34,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:34,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-05-02 18:07:34,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:34,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-05-02 18:07:34,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:34,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-05-02 18:07:34,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:34,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-05-02 18:07:34,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:34,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-05-02 18:07:34,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:34,473 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-05-02 18:07:34,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:07:34,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449067571] [2021-05-02 18:07:34,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449067571] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:07:34,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286770225] [2021-05-02 18:07:34,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 18:07:34,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:34,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 18:07:34,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:07:34,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:34,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:34,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:34,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:34,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:34,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:34,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:34,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:34,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:34,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:34,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:34,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:34,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:34,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:34,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:34,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:34,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:34,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:34,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:34,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:34,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:34,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:34,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:34,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:34,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:34,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:34,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:34,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:34,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:34,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:34,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:34,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:34,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:34,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:34,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:34,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:34,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:34,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:34,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:34,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:34,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:34,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:34,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:34,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:34,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:34,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:34,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:34,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:34,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:34,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:34,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:34,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:34,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:34,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:34,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:34,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:34,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:34,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:34,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:34,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:34,746 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-05-02 18:07:34,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286770225] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:07:34,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:07:34,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-05-02 18:07:34,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712419615] [2021-05-02 18:07:34,746 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 18:07:34,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:07:34,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 18:07:34,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-05-02 18:07:34,747 INFO L87 Difference]: Start difference. First operand 350 states and 554 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 11 states have internal predecessors, (39), 6 states have call successors, (29), 4 states have call predecessors, (29), 1 states have return successors, (25), 6 states have call predecessors, (25), 6 states have call successors, (25) [2021-05-02 18:07:36,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:07:36,592 INFO L93 Difference]: Finished difference Result 773 states and 1265 transitions. [2021-05-02 18:07:36,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-02 18:07:36,592 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 11 states have internal predecessors, (39), 6 states have call successors, (29), 4 states have call predecessors, (29), 1 states have return successors, (25), 6 states have call predecessors, (25), 6 states have call successors, (25) Word has length 84 [2021-05-02 18:07:36,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:07:36,595 INFO L225 Difference]: With dead ends: 773 [2021-05-02 18:07:36,595 INFO L226 Difference]: Without dead ends: 773 [2021-05-02 18:07:36,596 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 623.0ms TimeCoverageRelationStatistics Valid=303, Invalid=1103, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 18:07:36,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2021-05-02 18:07:36,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 404. [2021-05-02 18:07:36,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 185 states have (on average 1.3027027027027027) internal successors, (241), 199 states have internal predecessors, (241), 200 states have call successors, (200), 19 states have call predecessors, (200), 18 states have return successors, (199), 185 states have call predecessors, (199), 199 states have call successors, (199) [2021-05-02 18:07:36,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 640 transitions. [2021-05-02 18:07:36,610 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 640 transitions. Word has length 84 [2021-05-02 18:07:36,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:07:36,610 INFO L480 AbstractCegarLoop]: Abstraction has 404 states and 640 transitions. [2021-05-02 18:07:36,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 11 states have internal predecessors, (39), 6 states have call successors, (29), 4 states have call predecessors, (29), 1 states have return successors, (25), 6 states have call predecessors, (25), 6 states have call successors, (25) [2021-05-02 18:07:36,610 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 640 transitions. [2021-05-02 18:07:36,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-02 18:07:36,611 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:07:36,611 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:07:36,827 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:07:36,827 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:07:36,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:07:36,827 INFO L82 PathProgramCache]: Analyzing trace with hash 2088167042, now seen corresponding path program 2 times [2021-05-02 18:07:36,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:07:36,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044767006] [2021-05-02 18:07:36,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:07:36,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:36,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:07:36,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:36,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 18:07:36,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:36,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-05-02 18:07:36,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:36,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 18:07:36,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:36,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-05-02 18:07:36,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:36,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-05-02 18:07:36,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:36,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-05-02 18:07:36,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:36,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-05-02 18:07:36,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:36,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-05-02 18:07:36,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:36,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-05-02 18:07:36,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:36,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-05-02 18:07:36,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:36,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-05-02 18:07:36,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:36,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-05-02 18:07:36,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:36,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-05-02 18:07:36,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:36,940 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 26 proven. 8 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-05-02 18:07:36,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:07:36,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044767006] [2021-05-02 18:07:36,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044767006] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:07:36,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41377268] [2021-05-02 18:07:36,940 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 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 18:07:36,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 18:07:36,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:07:36,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 18:07:36,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:07:37,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:37,428 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-05-02 18:07:37,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41377268] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:07:37,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:07:37,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-02 18:07:37,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250830417] [2021-05-02 18:07:37,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 18:07:37,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:07:37,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 18:07:37,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-02 18:07:37,430 INFO L87 Difference]: Start difference. First operand 404 states and 640 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 15 states have internal predecessors, (40), 6 states have call successors, (31), 4 states have call predecessors, (31), 1 states have return successors, (27), 6 states have call predecessors, (27), 6 states have call successors, (27) [2021-05-02 18:07:40,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:07:40,266 INFO L93 Difference]: Finished difference Result 651 states and 1036 transitions. [2021-05-02 18:07:40,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-02 18:07:40,266 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 15 states have internal predecessors, (40), 6 states have call successors, (31), 4 states have call predecessors, (31), 1 states have return successors, (27), 6 states have call predecessors, (27), 6 states have call successors, (27) Word has length 89 [2021-05-02 18:07:40,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:07:40,268 INFO L225 Difference]: With dead ends: 651 [2021-05-02 18:07:40,268 INFO L226 Difference]: Without dead ends: 651 [2021-05-02 18:07:40,269 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 1342.0ms TimeCoverageRelationStatistics Valid=499, Invalid=1951, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 18:07:40,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2021-05-02 18:07:40,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 437. [2021-05-02 18:07:40,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 203 states have (on average 1.3004926108374384) internal successors, (264), 218 states have internal predecessors, (264), 212 states have call successors, (212), 22 states have call predecessors, (212), 21 states have return successors, (211), 196 states have call predecessors, (211), 211 states have call successors, (211) [2021-05-02 18:07:40,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 687 transitions. [2021-05-02 18:07:40,281 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 687 transitions. Word has length 89 [2021-05-02 18:07:40,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:07:40,282 INFO L480 AbstractCegarLoop]: Abstraction has 437 states and 687 transitions. [2021-05-02 18:07:40,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 15 states have internal predecessors, (40), 6 states have call successors, (31), 4 states have call predecessors, (31), 1 states have return successors, (27), 6 states have call predecessors, (27), 6 states have call successors, (27) [2021-05-02 18:07:40,282 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 687 transitions. [2021-05-02 18:07:40,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-05-02 18:07:40,283 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:07:40,283 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 20, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:07:40,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-02 18:07:40,500 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:07:40,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:07:40,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1146365298, now seen corresponding path program 1 times [2021-05-02 18:07:40,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:07:40,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193608435] [2021-05-02 18:07:40,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:07:40,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:40,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:07:40,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:40,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 18:07:40,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:40,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-05-02 18:07:40,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:40,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-02 18:07:40,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:40,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-05-02 18:07:40,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:40,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-05-02 18:07:40,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:40,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-05-02 18:07:40,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:40,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-05-02 18:07:40,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:40,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-05-02 18:07:40,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:40,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-05-02 18:07:40,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:40,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-05-02 18:07:40,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:40,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-05-02 18:07:40,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:40,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-05-02 18:07:40,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:40,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-05-02 18:07:40,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:40,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-05-02 18:07:40,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:40,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-05-02 18:07:40,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:40,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-05-02 18:07:40,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:40,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-05-02 18:07:40,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:40,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-05-02 18:07:40,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:40,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-05-02 18:07:40,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:40,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-05-02 18:07:40,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:40,606 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 53 proven. 13 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2021-05-02 18:07:40,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:07:40,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193608435] [2021-05-02 18:07:40,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193608435] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:07:40,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029185920] [2021-05-02 18:07:40,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 18:07:40,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:40,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 18:07:40,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:07:40,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:40,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:40,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:40,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:40,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:40,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:40,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:40,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:40,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:40,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:40,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:40,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:40,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:40,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:40,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:40,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:40,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:40,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:40,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:40,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:40,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:40,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:40,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:40,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:40,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:40,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:40,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:40,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:40,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:40,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:40,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:40,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:40,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:40,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:40,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:40,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:40,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:40,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:40,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:40,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:40,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:40,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:41,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:41,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:41,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:41,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:41,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:41,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:41,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:41,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:41,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:41,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:41,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:41,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:41,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:41,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:41,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:41,162 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 382 proven. 8 refuted. 0 times theorem prover too weak. 436 trivial. 0 not checked. [2021-05-02 18:07:41,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029185920] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:07:41,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:07:41,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-05-02 18:07:41,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401971512] [2021-05-02 18:07:41,163 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 18:07:41,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:07:41,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 18:07:41,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-05-02 18:07:41,164 INFO L87 Difference]: Start difference. First operand 437 states and 687 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 15 states have internal predecessors, (58), 10 states have call successors, (45), 4 states have call predecessors, (45), 2 states have return successors, (41), 10 states have call predecessors, (41), 10 states have call successors, (41) [2021-05-02 18:07:43,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:07:43,504 INFO L93 Difference]: Finished difference Result 703 states and 1110 transitions. [2021-05-02 18:07:43,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-02 18:07:43,505 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 15 states have internal predecessors, (58), 10 states have call successors, (45), 4 states have call predecessors, (45), 2 states have return successors, (41), 10 states have call predecessors, (41), 10 states have call successors, (41) Word has length 133 [2021-05-02 18:07:43,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:07:43,508 INFO L225 Difference]: With dead ends: 703 [2021-05-02 18:07:43,508 INFO L226 Difference]: Without dead ends: 696 [2021-05-02 18:07:43,509 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 1010.5ms TimeCoverageRelationStatistics Valid=503, Invalid=1849, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 18:07:43,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2021-05-02 18:07:43,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 535. [2021-05-02 18:07:43,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 250 states have (on average 1.308) internal successors, (327), 269 states have internal predecessors, (327), 261 states have call successors, (261), 24 states have call predecessors, (261), 23 states have return successors, (259), 241 states have call predecessors, (259), 259 states have call successors, (259) [2021-05-02 18:07:43,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 847 transitions. [2021-05-02 18:07:43,523 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 847 transitions. Word has length 133 [2021-05-02 18:07:43,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:07:43,523 INFO L480 AbstractCegarLoop]: Abstraction has 535 states and 847 transitions. [2021-05-02 18:07:43,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 15 states have internal predecessors, (58), 10 states have call successors, (45), 4 states have call predecessors, (45), 2 states have return successors, (41), 10 states have call predecessors, (41), 10 states have call successors, (41) [2021-05-02 18:07:43,524 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 847 transitions. [2021-05-02 18:07:43,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-05-02 18:07:43,525 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:07:43,525 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 20, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:07:43,743 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-02 18:07:43,743 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:07:43,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:07:43,743 INFO L82 PathProgramCache]: Analyzing trace with hash -702753875, now seen corresponding path program 1 times [2021-05-02 18:07:43,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:07:43,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739342451] [2021-05-02 18:07:43,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:07:43,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:43,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:07:43,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:43,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 18:07:43,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:43,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-05-02 18:07:43,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:43,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-02 18:07:43,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:43,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-05-02 18:07:43,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:43,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-05-02 18:07:43,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:43,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-05-02 18:07:43,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:43,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-05-02 18:07:43,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:43,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-05-02 18:07:43,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:43,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-05-02 18:07:43,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:43,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-05-02 18:07:43,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:43,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-05-02 18:07:43,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:43,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-05-02 18:07:43,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:43,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-05-02 18:07:43,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:43,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-05-02 18:07:43,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:43,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-05-02 18:07:43,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:43,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-05-02 18:07:43,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:43,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-05-02 18:07:43,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:43,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-05-02 18:07:43,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:43,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-05-02 18:07:43,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:43,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-05-02 18:07:43,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:43,837 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 53 proven. 13 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2021-05-02 18:07:43,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:07:43,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739342451] [2021-05-02 18:07:43,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739342451] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:07:43,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101716137] [2021-05-02 18:07:43,837 INFO L95 rtionOrderModulation]: Keeping assertion order 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 18:07:43,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:43,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 18:07:43,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:07:43,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:43,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:43,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:43,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:43,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:43,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:43,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:43,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:43,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:43,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:43,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:44,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:44,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:44,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:44,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:44,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:44,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:44,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:44,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:44,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:44,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:44,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:44,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:44,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:44,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:44,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:44,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:44,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:44,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:44,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:44,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:44,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:44,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:44,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:44,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:44,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:44,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:44,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:44,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:44,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:44,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:44,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:44,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:44,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:44,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:44,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:44,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:44,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:44,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:44,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:44,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:44,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:44,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:44,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:44,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:44,236 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 382 proven. 8 refuted. 0 times theorem prover too weak. 436 trivial. 0 not checked. [2021-05-02 18:07:44,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101716137] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:07:44,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:07:44,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-05-02 18:07:44,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037260984] [2021-05-02 18:07:44,237 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 18:07:44,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:07:44,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 18:07:44,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-05-02 18:07:44,237 INFO L87 Difference]: Start difference. First operand 535 states and 847 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 13 states have internal predecessors, (58), 8 states have call successors, (45), 4 states have call predecessors, (45), 2 states have return successors, (41), 8 states have call predecessors, (41), 8 states have call successors, (41) [2021-05-02 18:07:46,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:07:46,125 INFO L93 Difference]: Finished difference Result 568 states and 864 transitions. [2021-05-02 18:07:46,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-02 18:07:46,126 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 13 states have internal predecessors, (58), 8 states have call successors, (45), 4 states have call predecessors, (45), 2 states have return successors, (41), 8 states have call predecessors, (41), 8 states have call successors, (41) Word has length 133 [2021-05-02 18:07:46,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:07:46,128 INFO L225 Difference]: With dead ends: 568 [2021-05-02 18:07:46,128 INFO L226 Difference]: Without dead ends: 568 [2021-05-02 18:07:46,129 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 970.5ms TimeCoverageRelationStatistics Valid=384, Invalid=1338, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 18:07:46,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-05-02 18:07:46,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 436. [2021-05-02 18:07:46,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 218 states have (on average 1.2522935779816513) internal successors, (273), 229 states have internal predecessors, (273), 194 states have call successors, (194), 24 states have call predecessors, (194), 23 states have return successors, (192), 182 states have call predecessors, (192), 192 states have call successors, (192) [2021-05-02 18:07:46,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 659 transitions. [2021-05-02 18:07:46,140 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 659 transitions. Word has length 133 [2021-05-02 18:07:46,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:07:46,140 INFO L480 AbstractCegarLoop]: Abstraction has 436 states and 659 transitions. [2021-05-02 18:07:46,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 13 states have internal predecessors, (58), 8 states have call successors, (45), 4 states have call predecessors, (45), 2 states have return successors, (41), 8 states have call predecessors, (41), 8 states have call successors, (41) [2021-05-02 18:07:46,140 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 659 transitions. [2021-05-02 18:07:46,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-05-02 18:07:46,142 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:07:46,142 INFO L523 BasicCegarLoop]: trace histogram [22, 21, 21, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:07:46,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:07:46,357 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:07:46,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:07:46,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1117836428, now seen corresponding path program 1 times [2021-05-02 18:07:46,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:07:46,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881487246] [2021-05-02 18:07:46,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:07:46,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:46,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:07:46,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:46,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 18:07:46,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:46,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-05-02 18:07:46,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:46,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 18:07:46,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:46,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-05-02 18:07:46,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:46,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-05-02 18:07:46,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:46,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-05-02 18:07:46,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:46,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-05-02 18:07:46,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:46,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-05-02 18:07:46,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:46,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-05-02 18:07:46,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:46,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-05-02 18:07:46,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:46,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-05-02 18:07:46,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:46,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-05-02 18:07:46,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:46,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-05-02 18:07:46,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:46,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-05-02 18:07:46,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:46,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-05-02 18:07:46,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:46,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-05-02 18:07:46,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:46,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-05-02 18:07:46,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:46,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-05-02 18:07:46,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:46,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-05-02 18:07:46,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:46,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-05-02 18:07:46,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:46,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-05-02 18:07:46,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:46,477 INFO L134 CoverageAnalysis]: Checked inductivity of 909 backedges. 42 proven. 27 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2021-05-02 18:07:46,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:07:46,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881487246] [2021-05-02 18:07:46,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881487246] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:07:46,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397920476] [2021-05-02 18:07:46,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 18:07:46,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:07:46,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 18:07:46,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:07:46,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:46,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:47,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:47,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:47,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:47,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:47,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:47,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:47,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:47,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:47,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:47,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:47,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:47,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:47,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:47,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:47,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:47,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:49,142 WARN L205 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 3403 DAG size of output: 3396 [2021-05-02 18:07:49,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:07:49,736 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 2100 DAG size of output: 1991