/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-lit/gr2006.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 06:00:38,113 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 06:00:38,114 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 06:00:38,146 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 06:00:38,166 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 06:00:38,167 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 06:00:38,167 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 06:00:38,183 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 06:00:38,191 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 06:00:38,191 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 06:00:38,192 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 06:00:38,192 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 06:00:38,192 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 06:00:38,192 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 06:00:38,193 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 06:00:38,193 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 06:00:38,193 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 06:00:38,193 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 06:00:38,193 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 06:00:38,193 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 06:00:38,193 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 06:00:38,193 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 06:00:38,193 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 06:00:38,193 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 06:00:38,193 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 06:00:38,194 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 06:00:38,194 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 06:00:38,194 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 06:00:38,194 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 06:00:38,194 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 06:00:38,194 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 06:00:38,473 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 06:00:38,498 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 06:00:38,500 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 06:00:38,501 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 06:00:38,502 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 06:00:38,503 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gr2006.i [2021-05-06 06:00:38,550 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c694b5e37/1995ad85c0fa408586a66aea91eb0092/FLAGfe4cc7538 [2021-05-06 06:00:38,962 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 06:00:38,963 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gr2006.i [2021-05-06 06:00:38,969 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c694b5e37/1995ad85c0fa408586a66aea91eb0092/FLAGfe4cc7538 [2021-05-06 06:00:38,980 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c694b5e37/1995ad85c0fa408586a66aea91eb0092 [2021-05-06 06:00:38,982 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 06:00:38,983 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 06:00:38,984 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 06:00:38,984 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 06:00:38,987 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 06:00:38,987 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 06:00:38" (1/1) ... [2021-05-06 06:00:38,988 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23d7c6d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:00:38, skipping insertion in model container [2021-05-06 06:00:38,988 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 06:00:38" (1/1) ... [2021-05-06 06:00:38,992 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 06:00:39,004 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 06:00:39,094 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-lit/gr2006.i[895,908] [2021-05-06 06:00:39,102 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 06:00:39,107 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 06:00:39,116 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-lit/gr2006.i[895,908] [2021-05-06 06:00:39,119 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 06:00:39,130 INFO L208 MainTranslator]: Completed translation [2021-05-06 06:00:39,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:00:39 WrapperNode [2021-05-06 06:00:39,130 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 06:00:39,132 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 06:00:39,132 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 06:00:39,132 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 06:00:39,182 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:00:39" (1/1) ... [2021-05-06 06:00:39,185 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:00:39" (1/1) ... [2021-05-06 06:00:39,191 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:00:39" (1/1) ... [2021-05-06 06:00:39,191 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:00:39" (1/1) ... [2021-05-06 06:00:39,200 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:00:39" (1/1) ... [2021-05-06 06:00:39,203 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:00:39" (1/1) ... [2021-05-06 06:00:39,207 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:00:39" (1/1) ... [2021-05-06 06:00:39,214 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 06:00:39,215 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 06:00:39,216 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 06:00:39,216 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 06:00:39,216 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:00:39" (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 [2021-05-06 06:00:39,269 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 06:00:39,270 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 06:00:39,270 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 06:00:39,270 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 06:00:39,270 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 06:00:39,270 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 06:00:39,270 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 06:00:39,271 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 06:00:39,271 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-06 06:00:39,271 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-06 06:00:39,271 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 06:00:39,271 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 06:00:39,271 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 06:00:39,271 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 06:00:39,272 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 06:00:39,272 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 06:00:39,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 06:00:39,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 06:00:39,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 06:00:39,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 06:00:39,273 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 06:00:39,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 06:00:39,527 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 06:00:39,527 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 06:00:39,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 06:00:39 BoogieIcfgContainer [2021-05-06 06:00:39,528 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 06:00:39,529 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 06:00:39,529 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 06:00:39,529 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 06:00:39,531 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 06:00:39" (1/1) ... [2021-05-06 06:00:39,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 06:00:39 BasicIcfg [2021-05-06 06:00:39,557 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 06:00:39,558 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 06:00:39,558 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 06:00:39,560 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 06:00:39,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 06:00:38" (1/4) ... [2021-05-06 06:00:39,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a70ae22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 06:00:39, skipping insertion in model container [2021-05-06 06:00:39,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:00:39" (2/4) ... [2021-05-06 06:00:39,561 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a70ae22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 06:00:39, skipping insertion in model container [2021-05-06 06:00:39,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 06:00:39" (3/4) ... [2021-05-06 06:00:39,561 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a70ae22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 06:00:39, skipping insertion in model container [2021-05-06 06:00:39,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 06:00:39" (4/4) ... [2021-05-06 06:00:39,562 INFO L111 eAbstractionObserver]: Analyzing ICFG gr2006.iJordan [2021-05-06 06:00:39,565 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 06:00:39,568 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 06:00:39,578 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 06:00:39,591 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 06:00:39,591 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 06:00:39,591 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 06:00:39,591 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 06:00:39,591 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 06:00:39,591 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 06:00:39,592 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 06:00:39,592 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 06:00:39,600 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 06:00:39,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 06:00:39,605 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:00:39,605 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:00:39,606 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:00:39,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:00:39,609 INFO L82 PathProgramCache]: Analyzing trace with hash -27272427, now seen corresponding path program 1 times [2021-05-06 06:00:39,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:00:39,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993185974] [2021-05-06 06:00:39,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:00:39,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:00:39,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:00:39,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:00:39,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:00:39,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:00:39,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993185974] [2021-05-06 06:00:39,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993185974] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 06:00:39,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 06:00:39,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 06:00:39,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061640045] [2021-05-06 06:00:39,830 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 06:00:39,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:00:39,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 06:00:39,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 06:00:39,853 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-05-06 06:00:39,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:00:39,909 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2021-05-06 06:00:39,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 06:00:39,910 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 11 [2021-05-06 06:00:39,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:00:39,915 INFO L225 Difference]: With dead ends: 21 [2021-05-06 06:00:39,915 INFO L226 Difference]: Without dead ends: 14 [2021-05-06 06:00:39,916 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 77.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 06:00:39,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-05-06 06:00:39,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-05-06 06:00:39,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:00:39,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-05-06 06:00:39,934 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2021-05-06 06:00:39,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:00:39,935 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-05-06 06:00:39,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-05-06 06:00:39,935 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-05-06 06:00:39,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-06 06:00:39,935 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:00:39,935 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:00:39,935 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 06:00:39,936 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:00:39,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:00:39,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1365319963, now seen corresponding path program 1 times [2021-05-06 06:00:39,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:00:39,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451939881] [2021-05-06 06:00:39,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:00:39,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:00:40,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:00:40,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:00:40,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:00:40,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:00:40,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451939881] [2021-05-06 06:00:40,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451939881] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 06:00:40,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 06:00:40,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 06:00:40,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155290064] [2021-05-06 06:00:40,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 06:00:40,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:00:40,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 06:00:40,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 06:00:40,033 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-05-06 06:00:40,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:00:40,101 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2021-05-06 06:00:40,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 06:00:40,102 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 13 [2021-05-06 06:00:40,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:00:40,103 INFO L225 Difference]: With dead ends: 19 [2021-05-06 06:00:40,103 INFO L226 Difference]: Without dead ends: 19 [2021-05-06 06:00:40,104 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 77.3ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-06 06:00:40,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-06 06:00:40,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2021-05-06 06:00:40,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:00:40,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-05-06 06:00:40,111 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2021-05-06 06:00:40,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:00:40,111 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-05-06 06:00:40,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-05-06 06:00:40,111 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-05-06 06:00:40,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-06 06:00:40,112 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:00:40,112 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:00:40,112 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 06:00:40,112 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:00:40,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:00:40,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1393949114, now seen corresponding path program 1 times [2021-05-06 06:00:40,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:00:40,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229075668] [2021-05-06 06:00:40,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:00:40,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:00:40,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:00:40,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:00:40,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:00:40,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:00:40,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229075668] [2021-05-06 06:00:40,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229075668] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 06:00:40,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 06:00:40,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 06:00:40,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777577882] [2021-05-06 06:00:40,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 06:00:40,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:00:40,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 06:00:40,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 06:00:40,178 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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) [2021-05-06 06:00:40,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:00:40,215 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2021-05-06 06:00:40,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 06:00:40,216 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 13 [2021-05-06 06:00:40,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:00:40,216 INFO L225 Difference]: With dead ends: 20 [2021-05-06 06:00:40,216 INFO L226 Difference]: Without dead ends: 20 [2021-05-06 06:00:40,217 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-06 06:00:40,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-06 06:00:40,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-05-06 06:00:40,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:00:40,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-05-06 06:00:40,219 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 13 [2021-05-06 06:00:40,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:00:40,219 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-05-06 06:00:40,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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) [2021-05-06 06:00:40,219 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-05-06 06:00:40,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-06 06:00:40,220 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:00:40,220 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:00:40,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 06:00:40,220 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:00:40,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:00:40,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1701781083, now seen corresponding path program 1 times [2021-05-06 06:00:40,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:00:40,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412056167] [2021-05-06 06:00:40,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:00:40,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:00:40,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:00:40,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:00:40,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:00:40,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:00:40,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412056167] [2021-05-06 06:00:40,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412056167] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:00:40,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522609920] [2021-05-06 06:00:40,305 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 [2021-05-06 06:00:40,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:00:40,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-06 06:00:40,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:00:40,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:40,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:40,427 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:00:40,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522609920] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:00:40,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:00:40,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-05-06 06:00:40,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039269944] [2021-05-06 06:00:40,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 06:00:40,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:00:40,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 06:00:40,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 06:00:40,429 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:00:40,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:00:40,492 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2021-05-06 06:00:40,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 06:00:40,493 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-05-06 06:00:40,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:00:40,494 INFO L225 Difference]: With dead ends: 23 [2021-05-06 06:00:40,494 INFO L226 Difference]: Without dead ends: 23 [2021-05-06 06:00:40,495 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 82.3ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 06:00:40,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-06 06:00:40,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2021-05-06 06:00:40,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:00:40,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-05-06 06:00:40,503 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 16 [2021-05-06 06:00:40,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:00:40,503 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-05-06 06:00:40,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:00:40,503 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-05-06 06:00:40,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-06 06:00:40,504 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:00:40,504 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:00:40,716 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:00:40,717 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:00:40,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:00:40,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1726174694, now seen corresponding path program 2 times [2021-05-06 06:00:40,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:00:40,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084694459] [2021-05-06 06:00:40,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:00:40,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:00:40,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:00:40,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:00:40,824 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:00:40,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:00:40,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084694459] [2021-05-06 06:00:40,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084694459] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:00:40,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418984158] [2021-05-06 06:00:40,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:00:40,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 06:00:40,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:00:40,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 06:00:40,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:00:40,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:40,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:40,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:40,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:40,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:40,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:40,942 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 06:00:40,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418984158] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:00:40,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:00:40,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-05-06 06:00:40,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078905856] [2021-05-06 06:00:40,945 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 06:00:40,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:00:40,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 06:00:40,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-06 06:00:40,947 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:00:41,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:00:41,181 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2021-05-06 06:00:41,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 06:00:41,182 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-05-06 06:00:41,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:00:41,183 INFO L225 Difference]: With dead ends: 33 [2021-05-06 06:00:41,188 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 06:00:41,189 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 208.7ms TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-05-06 06:00:41,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 06:00:41,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2021-05-06 06:00:41,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:00:41,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2021-05-06 06:00:41,195 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 19 [2021-05-06 06:00:41,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:00:41,196 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2021-05-06 06:00:41,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:00:41,196 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2021-05-06 06:00:41,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 06:00:41,197 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:00:41,198 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:00:41,412 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:00:41,412 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:00:41,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:00:41,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1070981627, now seen corresponding path program 3 times [2021-05-06 06:00:41,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:00:41,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129270727] [2021-05-06 06:00:41,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:00:41,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:00:41,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:00:41,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:00:41,477 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-06 06:00:41,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:00:41,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129270727] [2021-05-06 06:00:41,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129270727] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:00:41,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595069084] [2021-05-06 06:00:41,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:00:41,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-06 06:00:41,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:00:41,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-06 06:00:41,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:00:41,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:41,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:41,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:41,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:41,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:41,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:41,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:41,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:41,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:41,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:41,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:41,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:41,653 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-06 06:00:41,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595069084] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:00:41,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:00:41,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-05-06 06:00:41,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098944745] [2021-05-06 06:00:41,654 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 06:00:41,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:00:41,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 06:00:41,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-06 06:00:41,655 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:00:41,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:00:41,929 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2021-05-06 06:00:41,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 06:00:41,929 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-05-06 06:00:41,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:00:41,930 INFO L225 Difference]: With dead ends: 43 [2021-05-06 06:00:41,930 INFO L226 Difference]: Without dead ends: 43 [2021-05-06 06:00:41,930 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 261.5ms TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2021-05-06 06:00:41,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-06 06:00:41,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2021-05-06 06:00:41,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:00:41,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-05-06 06:00:41,933 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 28 [2021-05-06 06:00:41,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:00:41,933 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-05-06 06:00:41,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:00:41,933 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-05-06 06:00:41,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 06:00:41,934 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:00:41,934 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:00:42,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:00:42,149 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:00:42,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:00:42,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1507340324, now seen corresponding path program 4 times [2021-05-06 06:00:42,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:00:42,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777094021] [2021-05-06 06:00:42,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:00:42,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:00:42,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:00:42,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:00:42,225 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 46 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 06:00:42,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:00:42,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777094021] [2021-05-06 06:00:42,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777094021] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:00:42,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374465060] [2021-05-06 06:00:42,226 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:00:42,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 06:00:42,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:00:42,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-06 06:00:42,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:00:42,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:42,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:42,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:42,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:42,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:42,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:42,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:42,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:42,365 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 46 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 06:00:42,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374465060] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:00:42,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:00:42,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-05-06 06:00:42,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517865389] [2021-05-06 06:00:42,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 06:00:42,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:00:42,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 06:00:42,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 06:00:42,366 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:00:42,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:00:42,504 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2021-05-06 06:00:42,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 06:00:42,505 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2021-05-06 06:00:42,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:00:42,505 INFO L225 Difference]: With dead ends: 39 [2021-05-06 06:00:42,505 INFO L226 Difference]: Without dead ends: 39 [2021-05-06 06:00:42,505 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 128.2ms TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-05-06 06:00:42,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-06 06:00:42,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2021-05-06 06:00:42,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:00:42,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-05-06 06:00:42,508 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 34 [2021-05-06 06:00:42,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:00:42,508 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-05-06 06:00:42,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:00:42,508 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-05-06 06:00:42,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 06:00:42,509 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:00:42,509 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:00:42,717 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:00:42,718 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:00:42,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:00:42,718 INFO L82 PathProgramCache]: Analyzing trace with hash 499616219, now seen corresponding path program 5 times [2021-05-06 06:00:42,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:00:42,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309996970] [2021-05-06 06:00:42,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:00:42,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:00:42,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:00:42,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:00:42,809 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 56 proven. 40 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 06:00:42,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:00:42,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309996970] [2021-05-06 06:00:42,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309996970] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:00:42,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228272957] [2021-05-06 06:00:42,810 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:00:42,858 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-05-06 06:00:42,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:00:42,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 06:00:42,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:00:42,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:42,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:42,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:42,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:42,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:42,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:42,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:42,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:42,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:42,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:42,930 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 56 proven. 40 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 06:00:42,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228272957] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:00:42,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:00:42,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-05-06 06:00:42,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144539322] [2021-05-06 06:00:42,931 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 06:00:42,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:00:42,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 06:00:42,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-06 06:00:42,931 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:00:43,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:00:43,094 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2021-05-06 06:00:43,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 06:00:43,095 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2021-05-06 06:00:43,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:00:43,096 INFO L225 Difference]: With dead ends: 42 [2021-05-06 06:00:43,096 INFO L226 Difference]: Without dead ends: 42 [2021-05-06 06:00:43,096 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 146.1ms TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-05-06 06:00:43,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-06 06:00:43,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-05-06 06:00:43,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:00:43,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2021-05-06 06:00:43,098 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 37 [2021-05-06 06:00:43,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:00:43,098 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2021-05-06 06:00:43,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:00:43,099 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2021-05-06 06:00:43,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-06 06:00:43,099 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:00:43,099 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:00:43,310 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:00:43,311 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:00:43,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:00:43,311 INFO L82 PathProgramCache]: Analyzing trace with hash -497738884, now seen corresponding path program 6 times [2021-05-06 06:00:43,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:00:43,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118095253] [2021-05-06 06:00:43,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:00:43,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:00:43,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:00:43,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:00:43,385 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 66 proven. 57 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 06:00:43,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:00:43,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118095253] [2021-05-06 06:00:43,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118095253] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:00:43,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454780645] [2021-05-06 06:00:43,386 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:00:43,443 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-05-06 06:00:43,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:00:43,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 06:00:43,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:00:43,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:43,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:43,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:43,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:43,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:43,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:43,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:43,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:43,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:43,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:43,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:43,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:43,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:43,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:43,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:43,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:43,575 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 89 proven. 34 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 06:00:43,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454780645] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:00:43,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:00:43,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2021-05-06 06:00:43,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350295465] [2021-05-06 06:00:43,576 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 06:00:43,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:00:43,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 06:00:43,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-05-06 06:00:43,576 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:00:43,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:00:43,986 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2021-05-06 06:00:43,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-06 06:00:43,987 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-05-06 06:00:43,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:00:43,987 INFO L225 Difference]: With dead ends: 58 [2021-05-06 06:00:43,988 INFO L226 Difference]: Without dead ends: 58 [2021-05-06 06:00:43,988 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 359.3ms TimeCoverageRelationStatistics Valid=272, Invalid=658, Unknown=0, NotChecked=0, Total=930 [2021-05-06 06:00:43,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-06 06:00:43,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 47. [2021-05-06 06:00:43,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 42 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:00:43,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2021-05-06 06:00:43,993 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 40 [2021-05-06 06:00:43,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:00:43,993 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2021-05-06 06:00:43,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:00:43,993 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2021-05-06 06:00:43,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-06 06:00:43,994 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:00:43,994 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:00:44,200 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:00:44,201 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:00:44,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:00:44,201 INFO L82 PathProgramCache]: Analyzing trace with hash -795537093, now seen corresponding path program 7 times [2021-05-06 06:00:44,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:00:44,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256876607] [2021-05-06 06:00:44,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:00:44,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:00:44,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:00:44,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:00:44,271 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 99 proven. 77 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-05-06 06:00:44,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:00:44,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256876607] [2021-05-06 06:00:44,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256876607] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:00:44,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905942542] [2021-05-06 06:00:44,271 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:00:44,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:00:44,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 06:00:44,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:00:44,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:44,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:44,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:44,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:44,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:44,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:44,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:44,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:44,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:44,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:44,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:44,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:44,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:44,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:44,403 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 99 proven. 77 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-05-06 06:00:44,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905942542] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:00:44,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:00:44,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2021-05-06 06:00:44,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355248199] [2021-05-06 06:00:44,406 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 06:00:44,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:00:44,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 06:00:44,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-06 06:00:44,407 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:00:44,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:00:44,627 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2021-05-06 06:00:44,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 06:00:44,628 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2021-05-06 06:00:44,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:00:44,628 INFO L225 Difference]: With dead ends: 51 [2021-05-06 06:00:44,628 INFO L226 Difference]: Without dead ends: 51 [2021-05-06 06:00:44,629 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 190.7ms TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2021-05-06 06:00:44,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-06 06:00:44,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2021-05-06 06:00:44,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 45 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:00:44,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2021-05-06 06:00:44,633 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 46 [2021-05-06 06:00:44,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:00:44,633 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2021-05-06 06:00:44,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:00:44,633 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2021-05-06 06:00:44,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-06 06:00:44,636 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:00:44,636 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:00:44,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 06:00:44,849 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:00:44,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:00:44,849 INFO L82 PathProgramCache]: Analyzing trace with hash 367707322, now seen corresponding path program 8 times [2021-05-06 06:00:44,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:00:44,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907416713] [2021-05-06 06:00:44,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:00:44,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:00:44,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:00:44,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:00:44,926 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 112 proven. 100 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-05-06 06:00:44,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:00:44,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907416713] [2021-05-06 06:00:44,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907416713] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:00:44,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38933872] [2021-05-06 06:00:44,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:00:44,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 06:00:44,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:00:44,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 06:00:44,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:00:44,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:44,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:44,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:44,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:45,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:45,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:45,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:45,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:45,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:45,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:45,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:45,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:45,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:45,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:45,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:45,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:45,057 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 112 proven. 100 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-05-06 06:00:45,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38933872] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:00:45,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:00:45,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-05-06 06:00:45,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647043818] [2021-05-06 06:00:45,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 06:00:45,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:00:45,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 06:00:45,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-06 06:00:45,059 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:00:45,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:00:45,292 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2021-05-06 06:00:45,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 06:00:45,293 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2021-05-06 06:00:45,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:00:45,293 INFO L225 Difference]: With dead ends: 54 [2021-05-06 06:00:45,293 INFO L226 Difference]: Without dead ends: 54 [2021-05-06 06:00:45,294 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 200.9ms TimeCoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2021-05-06 06:00:45,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-06 06:00:45,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-05-06 06:00:45,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.125) internal successors, (54), 48 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:00:45,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2021-05-06 06:00:45,299 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 49 [2021-05-06 06:00:45,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:00:45,299 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2021-05-06 06:00:45,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:00:45,299 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2021-05-06 06:00:45,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-06 06:00:45,300 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:00:45,300 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:00:45,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-06 06:00:45,513 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:00:45,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:00:45,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1509036837, now seen corresponding path program 9 times [2021-05-06 06:00:45,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:00:45,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023628054] [2021-05-06 06:00:45,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:00:45,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:00:45,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:00:45,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:00:45,617 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 125 proven. 126 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-05-06 06:00:45,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:00:45,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023628054] [2021-05-06 06:00:45,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023628054] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:00:45,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727655302] [2021-05-06 06:00:45,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:00:45,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-05-06 06:00:45,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:00:45,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 06:00:45,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:00:45,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:45,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:45,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:45,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:45,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:45,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:45,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:45,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:45,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:45,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:45,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:45,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:45,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:45,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:45,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:45,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:45,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:45,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:45,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:45,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:45,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:45,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:45,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:45,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:45,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:45,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:45,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:45,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:45,905 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 203 proven. 57 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-05-06 06:00:45,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727655302] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:00:45,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:00:45,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-05-06 06:00:45,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123545786] [2021-05-06 06:00:45,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-06 06:00:45,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:00:45,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-06 06:00:45,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2021-05-06 06:00:45,906 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 22 states have internal predecessors, (75), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:00:46,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:00:46,651 INFO L93 Difference]: Finished difference Result 137 states and 167 transitions. [2021-05-06 06:00:46,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-06 06:00:46,652 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 22 states have internal predecessors, (75), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2021-05-06 06:00:46,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:00:46,653 INFO L225 Difference]: With dead ends: 137 [2021-05-06 06:00:46,653 INFO L226 Difference]: Without dead ends: 137 [2021-05-06 06:00:46,654 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 710.9ms TimeCoverageRelationStatistics Valid=665, Invalid=1987, Unknown=0, NotChecked=0, Total=2652 [2021-05-06 06:00:46,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-05-06 06:00:46,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 71. [2021-05-06 06:00:46,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.1666666666666667) internal successors, (77), 66 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:00:46,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2021-05-06 06:00:46,657 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 52 [2021-05-06 06:00:46,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:00:46,657 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2021-05-06 06:00:46,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 22 states have internal predecessors, (75), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:00:46,657 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2021-05-06 06:00:46,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-06 06:00:46,658 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:00:46,658 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:00:46,872 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:00:46,873 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:00:46,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:00:46,873 INFO L82 PathProgramCache]: Analyzing trace with hash -2079511428, now seen corresponding path program 10 times [2021-05-06 06:00:46,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:00:46,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488368824] [2021-05-06 06:00:46,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:00:46,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:00:46,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:00:46,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:00:46,988 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 298 proven. 155 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-05-06 06:00:46,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:00:46,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488368824] [2021-05-06 06:00:46,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488368824] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:00:46,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617612220] [2021-05-06 06:00:46,988 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:00:47,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 06:00:47,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:00:47,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 06:00:47,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:00:47,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:47,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:47,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:47,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:47,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:47,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:47,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:47,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:47,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:47,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:47,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:47,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:47,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:47,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:47,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:47,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:47,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:47,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:47,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:47,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:47,124 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 298 proven. 155 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-05-06 06:00:47,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617612220] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:00:47,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:00:47,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-05-06 06:00:47,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115633221] [2021-05-06 06:00:47,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 06:00:47,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:00:47,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 06:00:47,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-06 06:00:47,126 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:00:47,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:00:47,362 INFO L93 Difference]: Finished difference Result 75 states and 85 transitions. [2021-05-06 06:00:47,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 06:00:47,363 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2021-05-06 06:00:47,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:00:47,363 INFO L225 Difference]: With dead ends: 75 [2021-05-06 06:00:47,363 INFO L226 Difference]: Without dead ends: 75 [2021-05-06 06:00:47,364 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 267.4ms TimeCoverageRelationStatistics Valid=248, Invalid=402, Unknown=0, NotChecked=0, Total=650 [2021-05-06 06:00:47,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-06 06:00:47,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2021-05-06 06:00:47,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.1594202898550725) internal successors, (80), 69 states have internal predecessors, (80), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:00:47,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2021-05-06 06:00:47,366 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 70 [2021-05-06 06:00:47,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:00:47,367 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2021-05-06 06:00:47,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:00:47,367 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2021-05-06 06:00:47,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-06 06:00:47,367 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:00:47,367 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:00:47,581 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:00:47,581 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:00:47,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:00:47,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1271917829, now seen corresponding path program 11 times [2021-05-06 06:00:47,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:00:47,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171994569] [2021-05-06 06:00:47,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:00:47,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:00:47,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:00:47,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:00:47,717 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 326 proven. 187 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-05-06 06:00:47,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:00:47,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171994569] [2021-05-06 06:00:47,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171994569] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:00:47,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115288899] [2021-05-06 06:00:47,717 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:00:47,790 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-05-06 06:00:47,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:00:47,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 06:00:47,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:00:47,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:47,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:47,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:47,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:47,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:47,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:47,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:47,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:47,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:47,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:47,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:47,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:47,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:47,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:47,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:47,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:47,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:47,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:47,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:47,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:47,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:47,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:47,896 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 326 proven. 187 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-05-06 06:00:47,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115288899] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:00:47,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:00:47,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-05-06 06:00:47,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905549179] [2021-05-06 06:00:47,897 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 06:00:47,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:00:47,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 06:00:47,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-06 06:00:47,898 INFO L87 Difference]: Start difference. First operand 74 states and 84 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:00:48,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:00:48,194 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2021-05-06 06:00:48,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 06:00:48,194 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2021-05-06 06:00:48,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:00:48,195 INFO L225 Difference]: With dead ends: 78 [2021-05-06 06:00:48,195 INFO L226 Difference]: Without dead ends: 78 [2021-05-06 06:00:48,195 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 274.8ms TimeCoverageRelationStatistics Valid=288, Invalid=468, Unknown=0, NotChecked=0, Total=756 [2021-05-06 06:00:48,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-06 06:00:48,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2021-05-06 06:00:48,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.1527777777777777) internal successors, (83), 72 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:00:48,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2021-05-06 06:00:48,205 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 73 [2021-05-06 06:00:48,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:00:48,205 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2021-05-06 06:00:48,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:00:48,205 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2021-05-06 06:00:48,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-06 06:00:48,207 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:00:48,207 INFO L523 BasicCegarLoop]: trace histogram [22, 21, 12, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:00:48,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 06:00:48,421 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:00:48,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:00:48,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1637165084, now seen corresponding path program 12 times [2021-05-06 06:00:48,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:00:48,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010060958] [2021-05-06 06:00:48,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:00:48,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:00:48,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:00:48,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:00:48,545 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 354 proven. 222 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-05-06 06:00:48,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:00:48,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010060958] [2021-05-06 06:00:48,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010060958] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:00:48,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616597965] [2021-05-06 06:00:48,545 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:00:48,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2021-05-06 06:00:48,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:00:48,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 06:00:48,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:00:48,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:48,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:48,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:48,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:48,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:48,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:48,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:48,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:48,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:48,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:48,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:48,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:48,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:48,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:48,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:48,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:48,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:48,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:48,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:48,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:48,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:48,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:48,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:48,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:48,739 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 354 proven. 222 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-05-06 06:00:48,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616597965] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:00:48,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:00:48,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2021-05-06 06:00:48,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861556302] [2021-05-06 06:00:48,740 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 06:00:48,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:00:48,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 06:00:48,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-05-06 06:00:48,741 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:00:49,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:00:49,057 INFO L93 Difference]: Finished difference Result 81 states and 91 transitions. [2021-05-06 06:00:49,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 06:00:49,058 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2021-05-06 06:00:49,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:00:49,058 INFO L225 Difference]: With dead ends: 81 [2021-05-06 06:00:49,058 INFO L226 Difference]: Without dead ends: 81 [2021-05-06 06:00:49,059 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 320.6ms TimeCoverageRelationStatistics Valid=331, Invalid=539, Unknown=0, NotChecked=0, Total=870 [2021-05-06 06:00:49,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-06 06:00:49,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2021-05-06 06:00:49,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.1466666666666667) internal successors, (86), 75 states have internal predecessors, (86), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:00:49,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 90 transitions. [2021-05-06 06:00:49,061 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 90 transitions. Word has length 76 [2021-05-06 06:00:49,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:00:49,061 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 90 transitions. [2021-05-06 06:00:49,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:00:49,061 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 90 transitions. [2021-05-06 06:00:49,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-06 06:00:49,063 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:00:49,064 INFO L523 BasicCegarLoop]: trace histogram [23, 22, 13, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:00:49,268 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-06 06:00:49,269 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:00:49,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:00:49,269 INFO L82 PathProgramCache]: Analyzing trace with hash -2018839717, now seen corresponding path program 13 times [2021-05-06 06:00:49,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:00:49,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981411061] [2021-05-06 06:00:49,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:00:49,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:00:49,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:00:49,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:00:49,441 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 382 proven. 260 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-05-06 06:00:49,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:00:49,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981411061] [2021-05-06 06:00:49,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981411061] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:00:49,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278111567] [2021-05-06 06:00:49,441 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:00:49,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:00:49,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 06:00:49,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:00:49,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:49,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:49,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:49,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:49,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:49,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:49,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:49,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:49,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:49,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:49,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:49,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:49,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:49,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:49,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:49,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:49,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:49,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:49,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:49,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:49,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:49,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:49,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:49,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:49,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:49,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:49,595 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 382 proven. 260 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-05-06 06:00:49,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278111567] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:00:49,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:00:49,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2021-05-06 06:00:49,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104414867] [2021-05-06 06:00:49,596 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 06:00:49,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:00:49,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 06:00:49,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-06 06:00:49,596 INFO L87 Difference]: Start difference. First operand 80 states and 90 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:00:49,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:00:49,959 INFO L93 Difference]: Finished difference Result 84 states and 94 transitions. [2021-05-06 06:00:49,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 06:00:49,960 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2021-05-06 06:00:49,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:00:49,960 INFO L225 Difference]: With dead ends: 84 [2021-05-06 06:00:49,960 INFO L226 Difference]: Without dead ends: 84 [2021-05-06 06:00:49,961 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 387.7ms TimeCoverageRelationStatistics Valid=377, Invalid=615, Unknown=0, NotChecked=0, Total=992 [2021-05-06 06:00:49,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-06 06:00:49,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2021-05-06 06:00:49,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.141025641025641) internal successors, (89), 78 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:00:49,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 93 transitions. [2021-05-06 06:00:49,963 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 93 transitions. Word has length 79 [2021-05-06 06:00:49,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:00:49,963 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 93 transitions. [2021-05-06 06:00:49,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:00:49,963 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 93 transitions. [2021-05-06 06:00:49,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-06 06:00:49,964 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:00:49,964 INFO L523 BasicCegarLoop]: trace histogram [24, 23, 14, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:00:50,180 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 06:00:50,180 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:00:50,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:00:50,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1982207044, now seen corresponding path program 14 times [2021-05-06 06:00:50,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:00:50,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683458829] [2021-05-06 06:00:50,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:00:50,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:00:50,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:00:50,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:00:50,316 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 410 proven. 301 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-05-06 06:00:50,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:00:50,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683458829] [2021-05-06 06:00:50,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683458829] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:00:50,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769018303] [2021-05-06 06:00:50,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:00:50,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 06:00:50,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:00:50,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 06:00:50,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:00:50,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:50,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:50,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:50,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:50,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:50,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:50,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:50,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:50,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:50,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:50,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:50,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:50,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:50,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:50,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:50,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:50,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:50,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:50,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:50,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:50,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:50,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:50,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:50,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:50,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:50,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:50,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:50,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:50,474 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 410 proven. 301 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-05-06 06:00:50,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769018303] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:00:50,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:00:50,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2021-05-06 06:00:50,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358882583] [2021-05-06 06:00:50,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-06 06:00:50,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:00:50,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-06 06:00:50,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-06 06:00:50,476 INFO L87 Difference]: Start difference. First operand 83 states and 93 transitions. Second operand has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:00:50,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:00:50,828 INFO L93 Difference]: Finished difference Result 87 states and 97 transitions. [2021-05-06 06:00:50,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 06:00:50,829 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2021-05-06 06:00:50,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:00:50,829 INFO L225 Difference]: With dead ends: 87 [2021-05-06 06:00:50,829 INFO L226 Difference]: Without dead ends: 87 [2021-05-06 06:00:50,830 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 387.7ms TimeCoverageRelationStatistics Valid=426, Invalid=696, Unknown=0, NotChecked=0, Total=1122 [2021-05-06 06:00:50,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-05-06 06:00:50,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2021-05-06 06:00:50,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 81 states have (on average 1.1358024691358024) internal successors, (92), 81 states have internal predecessors, (92), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:00:50,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 96 transitions. [2021-05-06 06:00:50,832 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 96 transitions. Word has length 82 [2021-05-06 06:00:50,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:00:50,832 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 96 transitions. [2021-05-06 06:00:50,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:00:50,832 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 96 transitions. [2021-05-06 06:00:50,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-06 06:00:50,832 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:00:50,833 INFO L523 BasicCegarLoop]: trace histogram [25, 24, 15, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:00:51,049 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:00:51,049 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:00:51,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:00:51,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1579938885, now seen corresponding path program 15 times [2021-05-06 06:00:51,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:00:51,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827257473] [2021-05-06 06:00:51,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:00:51,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:00:51,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:00:51,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:00:51,183 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 438 proven. 345 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-05-06 06:00:51,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:00:51,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827257473] [2021-05-06 06:00:51,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827257473] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:00:51,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113420170] [2021-05-06 06:00:51,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:00:51,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2021-05-06 06:00:51,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:00:51,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-06 06:00:51,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:00:51,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:51,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:51,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:51,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:51,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:51,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:51,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:51,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:51,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:51,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:51,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:51,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:51,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:51,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:51,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:51,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:51,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:51,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:51,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:51,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:51,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:51,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:51,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:51,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:51,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:51,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:51,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:51,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:51,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:51,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:51,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:51,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:51,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:51,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:51,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:51,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:51,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:51,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:51,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:51,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:51,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:51,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:51,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:51,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:51,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:51,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:51,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:51,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:51,559 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 24 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:00:51,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113420170] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:00:51,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:00:51,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 27] total 29 [2021-05-06 06:00:51,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356559649] [2021-05-06 06:00:51,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-06 06:00:51,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:00:51,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-06 06:00:51,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2021-05-06 06:00:51,561 INFO L87 Difference]: Start difference. First operand 86 states and 96 transitions. Second operand has 29 states, 29 states have (on average 3.103448275862069) internal successors, (90), 28 states have internal predecessors, (90), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:00:52,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:00:52,351 INFO L93 Difference]: Finished difference Result 117 states and 127 transitions. [2021-05-06 06:00:52,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-06 06:00:52,352 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.103448275862069) internal successors, (90), 28 states have internal predecessors, (90), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2021-05-06 06:00:52,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:00:52,352 INFO L225 Difference]: With dead ends: 117 [2021-05-06 06:00:52,352 INFO L226 Difference]: Without dead ends: 117 [2021-05-06 06:00:52,353 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 938.4ms TimeCoverageRelationStatistics Valid=1081, Invalid=1781, Unknown=0, NotChecked=0, Total=2862 [2021-05-06 06:00:52,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-05-06 06:00:52,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2021-05-06 06:00:52,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 111 states have (on average 1.0990990990990992) internal successors, (122), 111 states have internal predecessors, (122), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:00:52,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 126 transitions. [2021-05-06 06:00:52,355 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 126 transitions. Word has length 85 [2021-05-06 06:00:52,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:00:52,355 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 126 transitions. [2021-05-06 06:00:52,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 3.103448275862069) internal successors, (90), 28 states have internal predecessors, (90), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:00:52,355 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 126 transitions. [2021-05-06 06:00:52,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-05-06 06:00:52,356 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:00:52,356 INFO L523 BasicCegarLoop]: trace histogram [35, 34, 25, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:00:52,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 06:00:52,569 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:00:52,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:00:52,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1031327131, now seen corresponding path program 16 times [2021-05-06 06:00:52,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:00:52,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554002128] [2021-05-06 06:00:52,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:00:52,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:00:52,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:00:52,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:00:52,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1785 backedges. 718 proven. 950 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-05-06 06:00:52,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:00:52,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554002128] [2021-05-06 06:00:52,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554002128] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:00:52,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906517300] [2021-05-06 06:00:52,923 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:00:52,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 06:00:52,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:00:52,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-06 06:00:52,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:00:52,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:52,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:52,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:53,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:53,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:53,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:53,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:53,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:53,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:53,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:53,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:53,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:53,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:53,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:53,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:53,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:53,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:53,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:53,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:53,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:53,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:53,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:53,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:53,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:53,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:53,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:53,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:53,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:53,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:53,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:53,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:53,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:53,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:53,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:53,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:53,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:53,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:53,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:53,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:53,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:53,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:53,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:53,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:53,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:53,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:53,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:53,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:53,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:53,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:53,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:53,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1785 backedges. 718 proven. 950 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-05-06 06:00:53,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906517300] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:00:53,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:00:53,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2021-05-06 06:00:53,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892177107] [2021-05-06 06:00:53,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-06 06:00:53,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:00:53,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-06 06:00:53,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2021-05-06 06:00:53,127 INFO L87 Difference]: Start difference. First operand 116 states and 126 transitions. Second operand has 30 states, 30 states have (on average 3.066666666666667) internal successors, (92), 29 states have internal predecessors, (92), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:00:53,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:00:53,887 INFO L93 Difference]: Finished difference Result 120 states and 130 transitions. [2021-05-06 06:00:53,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-06 06:00:53,888 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.066666666666667) internal successors, (92), 29 states have internal predecessors, (92), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 115 [2021-05-06 06:00:53,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:00:53,888 INFO L225 Difference]: With dead ends: 120 [2021-05-06 06:00:53,889 INFO L226 Difference]: Without dead ends: 120 [2021-05-06 06:00:53,889 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 911.6ms TimeCoverageRelationStatistics Valid=1163, Invalid=1917, Unknown=0, NotChecked=0, Total=3080 [2021-05-06 06:00:53,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-05-06 06:00:53,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2021-05-06 06:00:53,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.0964912280701755) internal successors, (125), 114 states have internal predecessors, (125), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:00:53,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 129 transitions. [2021-05-06 06:00:53,891 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 129 transitions. Word has length 115 [2021-05-06 06:00:53,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:00:53,891 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 129 transitions. [2021-05-06 06:00:53,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 3.066666666666667) internal successors, (92), 29 states have internal predecessors, (92), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:00:53,892 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 129 transitions. [2021-05-06 06:00:53,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-05-06 06:00:53,892 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:00:53,892 INFO L523 BasicCegarLoop]: trace histogram [36, 35, 26, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:00:54,104 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:00:54,104 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:00:54,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:00:54,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1210247548, now seen corresponding path program 17 times [2021-05-06 06:00:54,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:00:54,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019087514] [2021-05-06 06:00:54,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:00:54,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:00:54,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:00:54,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:00:54,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 746 proven. 1027 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-05-06 06:00:54,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:00:54,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019087514] [2021-05-06 06:00:54,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019087514] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:00:54,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008222201] [2021-05-06 06:00:54,413 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:00:54,499 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2021-05-06 06:00:54,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:00:54,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-06 06:00:54,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:00:54,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:54,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:54,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:54,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:54,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:54,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:54,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:54,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:54,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:54,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:54,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:54,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:54,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:54,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:54,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:54,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:54,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:54,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:54,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:54,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:54,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:54,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:54,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:54,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:54,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:54,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:54,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:54,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:54,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:54,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:54,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:54,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:54,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:54,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:54,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:54,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:54,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:54,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:54,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:54,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:54,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:54,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:54,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:54,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:54,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:54,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:54,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:54,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:54,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:54,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:54,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:54,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:54,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 746 proven. 1027 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-05-06 06:00:54,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008222201] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:00:54,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:00:54,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2021-05-06 06:00:54,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997650299] [2021-05-06 06:00:54,655 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-06 06:00:54,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:00:54,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-06 06:00:54,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2021-05-06 06:00:54,655 INFO L87 Difference]: Start difference. First operand 119 states and 129 transitions. Second operand has 31 states, 31 states have (on average 3.064516129032258) internal successors, (95), 30 states have internal predecessors, (95), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:00:55,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:00:55,475 INFO L93 Difference]: Finished difference Result 123 states and 133 transitions. [2021-05-06 06:00:55,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-06 06:00:55,475 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.064516129032258) internal successors, (95), 30 states have internal predecessors, (95), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 118 [2021-05-06 06:00:55,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:00:55,476 INFO L225 Difference]: With dead ends: 123 [2021-05-06 06:00:55,476 INFO L226 Difference]: Without dead ends: 123 [2021-05-06 06:00:55,477 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 916.9ms TimeCoverageRelationStatistics Valid=1248, Invalid=2058, Unknown=0, NotChecked=0, Total=3306 [2021-05-06 06:00:55,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-05-06 06:00:55,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2021-05-06 06:00:55,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 117 states have (on average 1.0940170940170941) internal successors, (128), 117 states have internal predecessors, (128), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:00:55,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 132 transitions. [2021-05-06 06:00:55,479 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 132 transitions. Word has length 118 [2021-05-06 06:00:55,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:00:55,479 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 132 transitions. [2021-05-06 06:00:55,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 3.064516129032258) internal successors, (95), 30 states have internal predecessors, (95), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:00:55,479 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 132 transitions. [2021-05-06 06:00:55,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-05-06 06:00:55,480 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:00:55,480 INFO L523 BasicCegarLoop]: trace histogram [37, 36, 27, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:00:55,696 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:00:55,696 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:00:55,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:00:55,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1373976059, now seen corresponding path program 18 times [2021-05-06 06:00:55,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:00:55,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322186055] [2021-05-06 06:00:55,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:00:55,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:00:56,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:00:56,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:00:56,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1998 backedges. 774 proven. 1107 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-05-06 06:00:56,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:00:56,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322186055] [2021-05-06 06:00:56,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322186055] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:00:56,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894234399] [2021-05-06 06:00:56,045 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:00:56,122 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2021-05-06 06:00:56,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:00:56,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 06:00:56,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:00:56,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:56,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:56,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:56,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:56,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:56,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:56,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:56,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:56,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:56,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:56,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:56,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:56,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:56,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:56,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:56,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:56,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:56,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:56,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:56,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:56,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:56,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:56,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:56,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:56,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:56,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:56,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:56,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:56,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:56,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:56,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:56,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:56,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:56,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:56,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:56,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:56,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:56,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:56,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:56,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:56,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:56,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:56,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:56,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:56,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:56,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:56,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:56,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:56,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:56,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:56,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:56,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:56,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:56,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:56,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1998 backedges. 774 proven. 1107 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-05-06 06:00:56,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894234399] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:00:56,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:00:56,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2021-05-06 06:00:56,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477972311] [2021-05-06 06:00:56,312 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-06 06:00:56,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:00:56,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-06 06:00:56,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2021-05-06 06:00:56,315 INFO L87 Difference]: Start difference. First operand 122 states and 132 transitions. Second operand has 32 states, 32 states have (on average 3.0625) internal successors, (98), 31 states have internal predecessors, (98), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:00:57,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:00:57,146 INFO L93 Difference]: Finished difference Result 126 states and 136 transitions. [2021-05-06 06:00:57,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-06 06:00:57,147 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.0625) internal successors, (98), 31 states have internal predecessors, (98), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 121 [2021-05-06 06:00:57,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:00:57,148 INFO L225 Difference]: With dead ends: 126 [2021-05-06 06:00:57,148 INFO L226 Difference]: Without dead ends: 126 [2021-05-06 06:00:57,148 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 1021.2ms TimeCoverageRelationStatistics Valid=1336, Invalid=2204, Unknown=0, NotChecked=0, Total=3540 [2021-05-06 06:00:57,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-05-06 06:00:57,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2021-05-06 06:00:57,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.0916666666666666) internal successors, (131), 120 states have internal predecessors, (131), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:00:57,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 135 transitions. [2021-05-06 06:00:57,151 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 135 transitions. Word has length 121 [2021-05-06 06:00:57,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:00:57,151 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 135 transitions. [2021-05-06 06:00:57,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 3.0625) internal successors, (98), 31 states have internal predecessors, (98), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:00:57,151 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 135 transitions. [2021-05-06 06:00:57,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-05-06 06:00:57,151 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:00:57,151 INFO L523 BasicCegarLoop]: trace histogram [38, 37, 28, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:00:57,352 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-06 06:00:57,352 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:00:57,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:00:57,352 INFO L82 PathProgramCache]: Analyzing trace with hash -72800996, now seen corresponding path program 19 times [2021-05-06 06:00:57,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:00:57,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994918305] [2021-05-06 06:00:57,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:00:57,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:00:57,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:00:57,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:00:57,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2109 backedges. 802 proven. 1190 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-05-06 06:00:57,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:00:57,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994918305] [2021-05-06 06:00:57,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994918305] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:00:57,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363694035] [2021-05-06 06:00:57,724 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:00:57,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:00:57,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-06 06:00:57,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:00:57,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:57,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:57,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:57,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:57,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:57,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:57,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:57,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:57,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:57,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:57,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:57,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:57,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:57,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:57,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:57,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:57,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:57,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:57,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:57,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:57,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:57,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:57,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:57,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:57,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:57,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:57,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:57,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:57,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:57,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:57,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:57,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:57,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:57,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:57,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:57,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:57,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:57,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:57,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:57,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:57,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:57,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:57,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:57,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:57,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:57,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:57,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:57,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:57,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:57,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:57,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:57,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:57,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:57,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:57,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:57,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:57,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2109 backedges. 802 proven. 1190 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-05-06 06:00:57,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363694035] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:00:57,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:00:57,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2021-05-06 06:00:57,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997553931] [2021-05-06 06:00:57,941 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-06 06:00:57,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:00:57,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-06 06:00:57,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2021-05-06 06:00:57,942 INFO L87 Difference]: Start difference. First operand 125 states and 135 transitions. Second operand has 33 states, 33 states have (on average 3.0606060606060606) internal successors, (101), 32 states have internal predecessors, (101), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:00:58,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:00:58,765 INFO L93 Difference]: Finished difference Result 129 states and 139 transitions. [2021-05-06 06:00:58,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-06 06:00:58,767 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.0606060606060606) internal successors, (101), 32 states have internal predecessors, (101), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 124 [2021-05-06 06:00:58,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:00:58,767 INFO L225 Difference]: With dead ends: 129 [2021-05-06 06:00:58,767 INFO L226 Difference]: Without dead ends: 129 [2021-05-06 06:00:58,768 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 987.2ms TimeCoverageRelationStatistics Valid=1427, Invalid=2355, Unknown=0, NotChecked=0, Total=3782 [2021-05-06 06:00:58,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-06 06:00:58,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2021-05-06 06:00:58,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 123 states have (on average 1.089430894308943) internal successors, (134), 123 states have internal predecessors, (134), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:00:58,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 138 transitions. [2021-05-06 06:00:58,771 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 138 transitions. Word has length 124 [2021-05-06 06:00:58,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:00:58,771 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 138 transitions. [2021-05-06 06:00:58,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 3.0606060606060606) internal successors, (101), 32 states have internal predecessors, (101), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:00:58,771 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 138 transitions. [2021-05-06 06:00:58,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-05-06 06:00:58,772 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:00:58,772 INFO L523 BasicCegarLoop]: trace histogram [39, 38, 29, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:00:58,972 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:00:58,973 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:00:58,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:00:58,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1011231141, now seen corresponding path program 20 times [2021-05-06 06:00:58,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:00:58,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82749833] [2021-05-06 06:00:58,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:00:58,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:00:59,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:00:59,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:00:59,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2223 backedges. 830 proven. 1276 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-05-06 06:00:59,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:00:59,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82749833] [2021-05-06 06:00:59,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82749833] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:00:59,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746221453] [2021-05-06 06:00:59,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:00:59,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 06:00:59,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:00:59,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-06 06:00:59,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:00:59,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:59,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:59,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:59,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:59,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:59,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:59,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:59,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:59,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:59,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:59,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:59,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:59,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:59,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:59,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:59,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:59,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:59,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:59,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:59,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:59,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:59,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:59,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:59,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:59,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:59,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:59,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:59,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:59,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:59,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:59,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:59,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:59,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:59,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:59,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:59,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:59,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:59,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:59,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:59,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:59,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:59,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:59,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:59,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:59,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:59,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:59,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:59,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:59,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:59,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:59,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:59,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:59,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:59,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:59,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:59,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:59,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:59,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:00:59,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2223 backedges. 830 proven. 1276 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-05-06 06:00:59,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746221453] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:00:59,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:00:59,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 34 [2021-05-06 06:00:59,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621326175] [2021-05-06 06:00:59,604 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-06 06:00:59,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:00:59,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-06 06:00:59,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-05-06 06:00:59,605 INFO L87 Difference]: Start difference. First operand 128 states and 138 transitions. Second operand has 34 states, 34 states have (on average 3.0588235294117645) internal successors, (104), 33 states have internal predecessors, (104), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:01:00,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:01:00,441 INFO L93 Difference]: Finished difference Result 132 states and 142 transitions. [2021-05-06 06:01:00,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-06 06:01:00,441 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.0588235294117645) internal successors, (104), 33 states have internal predecessors, (104), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 127 [2021-05-06 06:01:00,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:01:00,442 INFO L225 Difference]: With dead ends: 132 [2021-05-06 06:01:00,442 INFO L226 Difference]: Without dead ends: 132 [2021-05-06 06:01:00,443 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 1030.9ms TimeCoverageRelationStatistics Valid=1521, Invalid=2511, Unknown=0, NotChecked=0, Total=4032 [2021-05-06 06:01:00,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-05-06 06:01:00,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2021-05-06 06:01:00,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.0873015873015872) internal successors, (137), 126 states have internal predecessors, (137), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:01:00,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 141 transitions. [2021-05-06 06:01:00,445 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 141 transitions. Word has length 127 [2021-05-06 06:01:00,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:01:00,445 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 141 transitions. [2021-05-06 06:01:00,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 3.0588235294117645) internal successors, (104), 33 states have internal predecessors, (104), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:01:00,445 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 141 transitions. [2021-05-06 06:01:00,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-06 06:01:00,445 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:01:00,446 INFO L523 BasicCegarLoop]: trace histogram [40, 39, 30, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:01:00,657 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-06 06:01:00,657 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:01:00,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:01:00,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1841551172, now seen corresponding path program 21 times [2021-05-06 06:01:00,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:01:00,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637538706] [2021-05-06 06:01:00,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:01:00,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:01:01,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:01:01,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:01:01,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2340 backedges. 858 proven. 1365 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-05-06 06:01:01,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:01:01,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637538706] [2021-05-06 06:01:01,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637538706] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:01:01,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685737553] [2021-05-06 06:01:01,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:01:01,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2021-05-06 06:01:01,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:01:01,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-06 06:01:01,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:01:01,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:01,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:01,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:01,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:01,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:01,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:01,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:01,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:01,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:01,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:01,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:01,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:01,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:01,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:01,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:01,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:01,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:01,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:01,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:01,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:01,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:01,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:01,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:01,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:01,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:01,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:01,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:01,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:01,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:01,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:01,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:01,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:01,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:01,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:01,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:01,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:01,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:01,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:01,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:01,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:01,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2340 backedges. 1481 proven. 262 refuted. 0 times theorem prover too weak. 597 trivial. 0 not checked. [2021-05-06 06:01:01,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685737553] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:01:01,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:01:01,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 13] total 45 [2021-05-06 06:01:01,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472633626] [2021-05-06 06:01:01,528 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-05-06 06:01:01,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:01:01,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-05-06 06:01:01,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=607, Invalid=1373, Unknown=0, NotChecked=0, Total=1980 [2021-05-06 06:01:01,529 INFO L87 Difference]: Start difference. First operand 131 states and 141 transitions. Second operand has 45 states, 45 states have (on average 3.3333333333333335) internal successors, (150), 44 states have internal predecessors, (150), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:01:03,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:01:03,147 INFO L93 Difference]: Finished difference Result 166 states and 186 transitions. [2021-05-06 06:01:03,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-06 06:01:03,148 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.3333333333333335) internal successors, (150), 44 states have internal predecessors, (150), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 130 [2021-05-06 06:01:03,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:01:03,148 INFO L225 Difference]: With dead ends: 166 [2021-05-06 06:01:03,148 INFO L226 Difference]: Without dead ends: 166 [2021-05-06 06:01:03,150 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1857 ImplicationChecksByTransitivity, 1834.3ms TimeCoverageRelationStatistics Valid=2597, Invalid=6715, Unknown=0, NotChecked=0, Total=9312 [2021-05-06 06:01:03,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-05-06 06:01:03,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 137. [2021-05-06 06:01:03,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.0909090909090908) internal successors, (144), 132 states have internal predecessors, (144), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:01:03,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 148 transitions. [2021-05-06 06:01:03,152 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 148 transitions. Word has length 130 [2021-05-06 06:01:03,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:01:03,152 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 148 transitions. [2021-05-06 06:01:03,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 3.3333333333333335) internal successors, (150), 44 states have internal predecessors, (150), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:01:03,152 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 148 transitions. [2021-05-06 06:01:03,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-05-06 06:01:03,153 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:01:03,153 INFO L523 BasicCegarLoop]: trace histogram [42, 41, 31, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:01:03,358 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-06 06:01:03,358 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:01:03,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:01:03,359 INFO L82 PathProgramCache]: Analyzing trace with hash -446354245, now seen corresponding path program 22 times [2021-05-06 06:01:03,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:01:03,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748824430] [2021-05-06 06:01:03,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:01:03,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:01:03,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:01:03,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:01:03,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2583 backedges. 981 proven. 1457 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-05-06 06:01:03,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:01:03,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748824430] [2021-05-06 06:01:03,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748824430] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:01:03,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061172654] [2021-05-06 06:01:03,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:01:03,888 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 06:01:03,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:01:03,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-06 06:01:03,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:01:03,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:03,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:03,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:03,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:03,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:03,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:03,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:03,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:03,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:03,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:03,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:03,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:03,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:03,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:03,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:03,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:03,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:03,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:03,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:03,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:03,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:03,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:03,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:03,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:03,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:03,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:03,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:03,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:03,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:03,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:03,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:03,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:03,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:03,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:03,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:03,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:03,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:03,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:03,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:03,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:03,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:03,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:03,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:03,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:03,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:04,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:04,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:04,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:04,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:04,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:04,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:04,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:04,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:04,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:04,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:04,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:04,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:04,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:04,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:04,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:04,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:04,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:04,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:04,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:04,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:04,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:04,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:04,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:04,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:04,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:04,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:04,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:04,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:04,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:04,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:04,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:04,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:04,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:04,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:04,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:04,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2583 backedges. 162 proven. 2420 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 06:01:04,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061172654] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:01:04,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:01:04,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 43] total 45 [2021-05-06 06:01:04,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767556409] [2021-05-06 06:01:04,297 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-05-06 06:01:04,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:01:04,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-05-06 06:01:04,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2021-05-06 06:01:04,298 INFO L87 Difference]: Start difference. First operand 137 states and 148 transitions. Second operand has 45 states, 45 states have (on average 3.066666666666667) internal successors, (138), 44 states have internal predecessors, (138), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:01:05,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:01:05,662 INFO L93 Difference]: Finished difference Result 168 states and 179 transitions. [2021-05-06 06:01:05,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-06 06:01:05,663 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.066666666666667) internal successors, (138), 44 states have internal predecessors, (138), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 136 [2021-05-06 06:01:05,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:01:05,663 INFO L225 Difference]: With dead ends: 168 [2021-05-06 06:01:05,663 INFO L226 Difference]: Without dead ends: 168 [2021-05-06 06:01:05,665 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 968 ImplicationChecksByTransitivity, 1803.0ms TimeCoverageRelationStatistics Valid=2753, Invalid=4557, Unknown=0, NotChecked=0, Total=7310 [2021-05-06 06:01:05,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-05-06 06:01:05,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 167. [2021-05-06 06:01:05,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.0740740740740742) internal successors, (174), 162 states have internal predecessors, (174), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:01:05,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 178 transitions. [2021-05-06 06:01:05,667 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 178 transitions. Word has length 136 [2021-05-06 06:01:05,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:01:05,667 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 178 transitions. [2021-05-06 06:01:05,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 3.066666666666667) internal successors, (138), 44 states have internal predecessors, (138), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:01:05,667 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 178 transitions. [2021-05-06 06:01:05,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-05-06 06:01:05,668 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:01:05,668 INFO L523 BasicCegarLoop]: trace histogram [52, 51, 41, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:01:05,880 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:01:05,881 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:01:05,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:01:05,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1188438309, now seen corresponding path program 23 times [2021-05-06 06:01:05,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:01:05,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701469589] [2021-05-06 06:01:05,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:01:05,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:01:06,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:01:06,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:01:06,581 INFO L134 CoverageAnalysis]: Checked inductivity of 3978 backedges. 1291 proven. 2542 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-05-06 06:01:06,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:01:06,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701469589] [2021-05-06 06:01:06,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701469589] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:01:06,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107586048] [2021-05-06 06:01:06,582 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:01:06,669 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2021-05-06 06:01:06,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:01:06,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-06 06:01:06,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:01:06,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:06,964 INFO L134 CoverageAnalysis]: Checked inductivity of 3978 backedges. 1291 proven. 2542 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-05-06 06:01:06,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107586048] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:01:06,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:01:06,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 46 [2021-05-06 06:01:06,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594192493] [2021-05-06 06:01:06,965 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-06 06:01:06,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:01:06,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-06 06:01:06,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2021-05-06 06:01:06,966 INFO L87 Difference]: Start difference. First operand 167 states and 178 transitions. Second operand has 46 states, 46 states have (on average 3.0434782608695654) internal successors, (140), 45 states have internal predecessors, (140), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:01:08,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:01:08,489 INFO L93 Difference]: Finished difference Result 171 states and 182 transitions. [2021-05-06 06:01:08,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-06 06:01:08,489 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.0434782608695654) internal successors, (140), 45 states have internal predecessors, (140), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 166 [2021-05-06 06:01:08,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:01:08,490 INFO L225 Difference]: With dead ends: 171 [2021-05-06 06:01:08,490 INFO L226 Difference]: Without dead ends: 171 [2021-05-06 06:01:08,491 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 1909.2ms TimeCoverageRelationStatistics Valid=2883, Invalid=4773, Unknown=0, NotChecked=0, Total=7656 [2021-05-06 06:01:08,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-05-06 06:01:08,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 170. [2021-05-06 06:01:08,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 165 states have (on average 1.0727272727272728) internal successors, (177), 165 states have internal predecessors, (177), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:01:08,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 181 transitions. [2021-05-06 06:01:08,494 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 181 transitions. Word has length 166 [2021-05-06 06:01:08,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:01:08,494 INFO L480 AbstractCegarLoop]: Abstraction has 170 states and 181 transitions. [2021-05-06 06:01:08,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 3.0434782608695654) internal successors, (140), 45 states have internal predecessors, (140), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:01:08,494 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 181 transitions. [2021-05-06 06:01:08,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-05-06 06:01:08,494 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:01:08,495 INFO L523 BasicCegarLoop]: trace histogram [53, 52, 42, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:01:08,709 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-06 06:01:08,709 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:01:08,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:01:08,709 INFO L82 PathProgramCache]: Analyzing trace with hash 367497562, now seen corresponding path program 24 times [2021-05-06 06:01:08,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:01:08,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054569776] [2021-05-06 06:01:08,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:01:08,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:01:09,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:01:09,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:01:09,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4134 backedges. 1322 proven. 2667 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-05-06 06:01:09,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:01:09,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054569776] [2021-05-06 06:01:09,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054569776] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:01:09,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564474993] [2021-05-06 06:01:09,427 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:01:09,524 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2021-05-06 06:01:09,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:01:09,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-06 06:01:09,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:01:09,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:09,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:09,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:09,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:09,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:09,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:09,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:09,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:09,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:09,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:09,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:09,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:09,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:09,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:09,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:09,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:09,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:09,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:09,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:09,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:09,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:09,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:09,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:09,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:09,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:09,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:09,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:09,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:09,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:09,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:10,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:10,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:10,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:10,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:10,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:10,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:10,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:10,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:10,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:10,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:10,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:10,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:10,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:10,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:10,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:10,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:10,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:10,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:10,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:10,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:10,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:10,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:10,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:10,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:10,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:10,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:10,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:10,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:10,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:10,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:10,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:10,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:10,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:10,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:10,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:10,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:10,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:10,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:10,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:10,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:10,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:10,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:10,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:10,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:10,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:10,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:10,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:10,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:10,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:10,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:10,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:10,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:10,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:10,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:10,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:10,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:10,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:10,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:10,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4134 backedges. 3674 proven. 321 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-05-06 06:01:10,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564474993] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:01:10,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:01:10,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 36] total 80 [2021-05-06 06:01:10,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390130448] [2021-05-06 06:01:10,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2021-05-06 06:01:10,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:01:10,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-05-06 06:01:10,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1621, Invalid=4699, Unknown=0, NotChecked=0, Total=6320 [2021-05-06 06:01:10,836 INFO L87 Difference]: Start difference. First operand 170 states and 181 transitions. Second operand has 80 states, 80 states have (on average 3.2) internal successors, (256), 79 states have internal predecessors, (256), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:01:15,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:01:15,269 INFO L93 Difference]: Finished difference Result 956 states and 1220 transitions. [2021-05-06 06:01:15,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-05-06 06:01:15,274 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 3.2) internal successors, (256), 79 states have internal predecessors, (256), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 169 [2021-05-06 06:01:15,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:01:15,276 INFO L225 Difference]: With dead ends: 956 [2021-05-06 06:01:15,276 INFO L226 Difference]: Without dead ends: 956 [2021-05-06 06:01:15,278 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9545 ImplicationChecksByTransitivity, 5051.1ms TimeCoverageRelationStatistics Valid=8054, Invalid=27856, Unknown=0, NotChecked=0, Total=35910 [2021-05-06 06:01:15,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2021-05-06 06:01:15,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 242. [2021-05-06 06:01:15,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 237 states have (on average 1.1476793248945147) internal successors, (272), 237 states have internal predecessors, (272), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:01:15,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 276 transitions. [2021-05-06 06:01:15,283 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 276 transitions. Word has length 169 [2021-05-06 06:01:15,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:01:15,283 INFO L480 AbstractCegarLoop]: Abstraction has 242 states and 276 transitions. [2021-05-06 06:01:15,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 80 states, 80 states have (on average 3.2) internal successors, (256), 79 states have internal predecessors, (256), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:01:15,283 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 276 transitions. [2021-05-06 06:01:15,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-05-06 06:01:15,284 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:01:15,284 INFO L523 BasicCegarLoop]: trace histogram [77, 76, 43, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:01:15,497 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:01:15,497 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:01:15,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:01:15,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1669273851, now seen corresponding path program 25 times [2021-05-06 06:01:15,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:01:15,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261226218] [2021-05-06 06:01:15,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:01:15,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:01:16,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:01:16,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:01:16,274 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 4366 proven. 2795 refuted. 0 times theorem prover too weak. 1617 trivial. 0 not checked. [2021-05-06 06:01:16,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:01:16,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261226218] [2021-05-06 06:01:16,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261226218] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:01:16,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106676034] [2021-05-06 06:01:16,275 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:01:16,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:01:16,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-06 06:01:16,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:01:16,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:16,664 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 4366 proven. 2795 refuted. 0 times theorem prover too weak. 1617 trivial. 0 not checked. [2021-05-06 06:01:16,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106676034] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:01:16,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:01:16,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 48 [2021-05-06 06:01:16,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762727694] [2021-05-06 06:01:16,665 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-06 06:01:16,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:01:16,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-06 06:01:16,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2021-05-06 06:01:16,666 INFO L87 Difference]: Start difference. First operand 242 states and 276 transitions. Second operand has 48 states, 48 states have (on average 3.0416666666666665) internal successors, (146), 47 states have internal predecessors, (146), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:01:18,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:01:18,253 INFO L93 Difference]: Finished difference Result 246 states and 280 transitions. [2021-05-06 06:01:18,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-06 06:01:18,253 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.0416666666666665) internal successors, (146), 47 states have internal predecessors, (146), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 241 [2021-05-06 06:01:18,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:01:18,254 INFO L225 Difference]: With dead ends: 246 [2021-05-06 06:01:18,254 INFO L226 Difference]: Without dead ends: 246 [2021-05-06 06:01:18,255 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1115 ImplicationChecksByTransitivity, 2033.5ms TimeCoverageRelationStatistics Valid=3152, Invalid=5220, Unknown=0, NotChecked=0, Total=8372 [2021-05-06 06:01:18,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-05-06 06:01:18,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 245. [2021-05-06 06:01:18,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 240 states have (on average 1.1458333333333333) internal successors, (275), 240 states have internal predecessors, (275), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:01:18,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 279 transitions. [2021-05-06 06:01:18,258 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 279 transitions. Word has length 241 [2021-05-06 06:01:18,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:01:18,258 INFO L480 AbstractCegarLoop]: Abstraction has 245 states and 279 transitions. [2021-05-06 06:01:18,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 3.0416666666666665) internal successors, (146), 47 states have internal predecessors, (146), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:01:18,258 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 279 transitions. [2021-05-06 06:01:18,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-05-06 06:01:18,259 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:01:18,259 INFO L523 BasicCegarLoop]: trace histogram [78, 77, 44, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:01:18,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-06 06:01:18,469 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:01:18,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:01:18,469 INFO L82 PathProgramCache]: Analyzing trace with hash -307386084, now seen corresponding path program 26 times [2021-05-06 06:01:18,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:01:18,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132117598] [2021-05-06 06:01:18,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:01:18,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:01:19,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:01:19,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:01:19,208 INFO L134 CoverageAnalysis]: Checked inductivity of 9009 backedges. 4466 proven. 2926 refuted. 0 times theorem prover too weak. 1617 trivial. 0 not checked. [2021-05-06 06:01:19,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:01:19,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132117598] [2021-05-06 06:01:19,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132117598] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:01:19,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36495364] [2021-05-06 06:01:19,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:01:19,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 06:01:19,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:01:19,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 616 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-06 06:01:19,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:01:19,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:19,581 INFO L134 CoverageAnalysis]: Checked inductivity of 9009 backedges. 4466 proven. 2926 refuted. 0 times theorem prover too weak. 1617 trivial. 0 not checked. [2021-05-06 06:01:19,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36495364] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:01:19,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:01:19,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47] total 49 [2021-05-06 06:01:19,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262806418] [2021-05-06 06:01:19,582 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-05-06 06:01:19,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:01:19,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-05-06 06:01:19,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2021-05-06 06:01:19,582 INFO L87 Difference]: Start difference. First operand 245 states and 279 transitions. Second operand has 49 states, 49 states have (on average 3.0408163265306123) internal successors, (149), 48 states have internal predecessors, (149), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:01:21,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:01:21,166 INFO L93 Difference]: Finished difference Result 249 states and 283 transitions. [2021-05-06 06:01:21,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-06 06:01:21,166 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.0408163265306123) internal successors, (149), 48 states have internal predecessors, (149), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 244 [2021-05-06 06:01:21,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:01:21,167 INFO L225 Difference]: With dead ends: 249 [2021-05-06 06:01:21,167 INFO L226 Difference]: Without dead ends: 249 [2021-05-06 06:01:21,168 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1163 ImplicationChecksByTransitivity, 2085.8ms TimeCoverageRelationStatistics Valid=3291, Invalid=5451, Unknown=0, NotChecked=0, Total=8742 [2021-05-06 06:01:21,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-05-06 06:01:21,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 248. [2021-05-06 06:01:21,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 243 states have (on average 1.1440329218106995) internal successors, (278), 243 states have internal predecessors, (278), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:01:21,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 282 transitions. [2021-05-06 06:01:21,171 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 282 transitions. Word has length 244 [2021-05-06 06:01:21,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:01:21,171 INFO L480 AbstractCegarLoop]: Abstraction has 248 states and 282 transitions. [2021-05-06 06:01:21,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 3.0408163265306123) internal successors, (149), 48 states have internal predecessors, (149), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:01:21,171 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 282 transitions. [2021-05-06 06:01:21,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2021-05-06 06:01:21,172 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:01:21,172 INFO L523 BasicCegarLoop]: trace histogram [79, 78, 45, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:01:21,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-06 06:01:21,377 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:01:21,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:01:21,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1313085787, now seen corresponding path program 27 times [2021-05-06 06:01:21,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:01:21,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16633501] [2021-05-06 06:01:21,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:01:21,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:01:22,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:01:22,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:01:22,241 INFO L134 CoverageAnalysis]: Checked inductivity of 9243 backedges. 4566 proven. 3060 refuted. 0 times theorem prover too weak. 1617 trivial. 0 not checked. [2021-05-06 06:01:22,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:01:22,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16633501] [2021-05-06 06:01:22,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16633501] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:01:22,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591004183] [2021-05-06 06:01:22,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:01:22,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 79 check-sat command(s) [2021-05-06 06:01:22,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:01:22,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-06 06:01:22,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:01:22,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:22,928 INFO L134 CoverageAnalysis]: Checked inductivity of 9243 backedges. 4370 proven. 3626 refuted. 0 times theorem prover too weak. 1247 trivial. 0 not checked. [2021-05-06 06:01:22,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591004183] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:01:22,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:01:22,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 52] total 54 [2021-05-06 06:01:22,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409763852] [2021-05-06 06:01:22,929 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-05-06 06:01:22,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:01:22,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-05-06 06:01:22,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2021-05-06 06:01:22,930 INFO L87 Difference]: Start difference. First operand 248 states and 282 transitions. Second operand has 54 states, 54 states have (on average 3.0555555555555554) internal successors, (165), 53 states have internal predecessors, (165), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:01:24,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:01:24,806 INFO L93 Difference]: Finished difference Result 295 states and 329 transitions. [2021-05-06 06:01:24,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-06 06:01:24,806 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.0555555555555554) internal successors, (165), 53 states have internal predecessors, (165), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 247 [2021-05-06 06:01:24,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:01:24,807 INFO L225 Difference]: With dead ends: 295 [2021-05-06 06:01:24,807 INFO L226 Difference]: Without dead ends: 295 [2021-05-06 06:01:24,808 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1414 ImplicationChecksByTransitivity, 2571.0ms TimeCoverageRelationStatistics Valid=4031, Invalid=6681, Unknown=0, NotChecked=0, Total=10712 [2021-05-06 06:01:24,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-05-06 06:01:24,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 263. [2021-05-06 06:01:24,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 258 states have (on average 1.1356589147286822) internal successors, (293), 258 states have internal predecessors, (293), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:01:24,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 297 transitions. [2021-05-06 06:01:24,811 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 297 transitions. Word has length 247 [2021-05-06 06:01:24,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:01:24,811 INFO L480 AbstractCegarLoop]: Abstraction has 263 states and 297 transitions. [2021-05-06 06:01:24,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 3.0555555555555554) internal successors, (165), 53 states have internal predecessors, (165), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:01:24,811 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 297 transitions. [2021-05-06 06:01:24,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-05-06 06:01:24,812 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:01:24,812 INFO L523 BasicCegarLoop]: trace histogram [84, 83, 50, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:01:25,024 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:01:25,025 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:01:25,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:01:25,025 INFO L82 PathProgramCache]: Analyzing trace with hash 2024270844, now seen corresponding path program 28 times [2021-05-06 06:01:25,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:01:25,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516112486] [2021-05-06 06:01:25,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:01:25,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:01:25,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:01:25,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:01:25,558 INFO L134 CoverageAnalysis]: Checked inductivity of 10458 backedges. 6665 proven. 3334 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2021-05-06 06:01:25,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:01:25,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516112486] [2021-05-06 06:01:25,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516112486] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:01:25,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756828177] [2021-05-06 06:01:25,558 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:01:25,653 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 06:01:25,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:01:25,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 86 conjunts are in the unsatisfiable core [2021-05-06 06:01:25,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:01:25,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:25,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:26,529 INFO L134 CoverageAnalysis]: Checked inductivity of 10458 backedges. 7024 proven. 3334 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-05-06 06:01:26,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756828177] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:01:26,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:01:26,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 53] total 54 [2021-05-06 06:01:26,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434991189] [2021-05-06 06:01:26,530 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-05-06 06:01:26,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:01:26,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-05-06 06:01:26,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2021-05-06 06:01:26,531 INFO L87 Difference]: Start difference. First operand 263 states and 297 transitions. Second operand has 54 states, 54 states have (on average 3.9814814814814814) internal successors, (215), 53 states have internal predecessors, (215), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:01:28,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:01:28,032 INFO L93 Difference]: Finished difference Result 2014 states and 2626 transitions. [2021-05-06 06:01:28,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-06 06:01:28,032 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.9814814814814814) internal successors, (215), 53 states have internal predecessors, (215), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 262 [2021-05-06 06:01:28,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:01:28,037 INFO L225 Difference]: With dead ends: 2014 [2021-05-06 06:01:28,037 INFO L226 Difference]: Without dead ends: 2014 [2021-05-06 06:01:28,038 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1259 ImplicationChecksByTransitivity, 2086.1ms TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2021-05-06 06:01:28,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2014 states. [2021-05-06 06:01:28,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2014 to 314. [2021-05-06 06:01:28,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 309 states have (on average 1.168284789644013) internal successors, (361), 309 states have internal predecessors, (361), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:01:28,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 365 transitions. [2021-05-06 06:01:28,048 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 365 transitions. Word has length 262 [2021-05-06 06:01:28,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:01:28,049 INFO L480 AbstractCegarLoop]: Abstraction has 314 states and 365 transitions. [2021-05-06 06:01:28,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 3.9814814814814814) internal successors, (215), 53 states have internal predecessors, (215), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:01:28,049 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 365 transitions. [2021-05-06 06:01:28,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2021-05-06 06:01:28,051 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:01:28,051 INFO L523 BasicCegarLoop]: trace histogram [101, 100, 51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:01:28,256 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:01:28,257 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:01:28,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:01:28,257 INFO L82 PathProgramCache]: Analyzing trace with hash 727187930, now seen corresponding path program 29 times [2021-05-06 06:01:28,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:01:28,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738494085] [2021-05-06 06:01:28,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:01:28,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:01:31,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:01:31,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:01:31,590 INFO L134 CoverageAnalysis]: Checked inductivity of 15150 backedges. 0 proven. 15150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:01:31,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:01:31,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738494085] [2021-05-06 06:01:31,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738494085] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:01:31,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467789352] [2021-05-06 06:01:31,590 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:01:31,783 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 101 check-sat command(s) [2021-05-06 06:01:31,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:01:31,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 777 conjuncts, 205 conjunts are in the unsatisfiable core [2021-05-06 06:01:31,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:01:35,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:35,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:35,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:35,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:35,447 INFO L134 CoverageAnalysis]: Checked inductivity of 15150 backedges. 0 proven. 15150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:01:35,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467789352] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:01:35,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:01:35,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 105] total 158 [2021-05-06 06:01:35,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464420886] [2021-05-06 06:01:35,449 INFO L460 AbstractCegarLoop]: Interpolant automaton has 158 states [2021-05-06 06:01:35,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:01:35,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2021-05-06 06:01:35,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2865, Invalid=21941, Unknown=0, NotChecked=0, Total=24806 [2021-05-06 06:01:35,450 INFO L87 Difference]: Start difference. First operand 314 states and 365 transitions. Second operand has 158 states, 158 states have (on average 2.9240506329113924) internal successors, (462), 155 states have internal predecessors, (462), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:01:54,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:01:54,499 INFO L93 Difference]: Finished difference Result 4243 states and 4343 transitions. [2021-05-06 06:01:54,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-05-06 06:01:54,499 INFO L78 Accepts]: Start accepts. Automaton has has 158 states, 158 states have (on average 2.9240506329113924) internal successors, (462), 155 states have internal predecessors, (462), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 313 [2021-05-06 06:01:54,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:01:54,509 INFO L225 Difference]: With dead ends: 4243 [2021-05-06 06:01:54,509 INFO L226 Difference]: Without dead ends: 4240 [2021-05-06 06:01:54,512 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 262 SyntacticMatches, 2 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17592 ImplicationChecksByTransitivity, 12254.3ms TimeCoverageRelationStatistics Valid=4718, Invalid=64188, Unknown=0, NotChecked=0, Total=68906 [2021-05-06 06:01:54,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4240 states. [2021-05-06 06:01:54,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4240 to 4191. [2021-05-06 06:01:54,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4191 states, 4186 states have (on average 1.0241280458671762) internal successors, (4287), 4186 states have internal predecessors, (4287), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:01:54,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4191 states to 4191 states and 4291 transitions. [2021-05-06 06:01:54,556 INFO L78 Accepts]: Start accepts. Automaton has 4191 states and 4291 transitions. Word has length 313 [2021-05-06 06:01:54,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:01:54,557 INFO L480 AbstractCegarLoop]: Abstraction has 4191 states and 4291 transitions. [2021-05-06 06:01:54,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 158 states, 158 states have (on average 2.9240506329113924) internal successors, (462), 155 states have internal predecessors, (462), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:01:54,557 INFO L276 IsEmpty]: Start isEmpty. Operand 4191 states and 4291 transitions. [2021-05-06 06:01:54,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2021-05-06 06:01:54,558 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:01:54,558 INFO L523 BasicCegarLoop]: trace histogram [102, 101, 52, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:01:54,772 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-05-06 06:01:54,773 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:01:54,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:01:54,773 INFO L82 PathProgramCache]: Analyzing trace with hash 635638076, now seen corresponding path program 30 times [2021-05-06 06:01:54,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:01:54,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118598974] [2021-05-06 06:01:54,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:01:54,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:01:55,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:01:55,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:01:55,862 INFO L134 CoverageAnalysis]: Checked inductivity of 15453 backedges. 7903 proven. 7403 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-05-06 06:01:55,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:01:55,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118598974] [2021-05-06 06:01:55,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118598974] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:01:55,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65743237] [2021-05-06 06:01:55,863 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:01:56,066 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 102 check-sat command(s) [2021-05-06 06:01:56,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:01:56,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 103 conjunts are in the unsatisfiable core [2021-05-06 06:01:56,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:01:56,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:01:56,566 INFO L134 CoverageAnalysis]: Checked inductivity of 15453 backedges. 7903 proven. 7401 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-05-06 06:01:56,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65743237] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:01:56,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:01:56,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 54] total 56 [2021-05-06 06:01:56,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150612421] [2021-05-06 06:01:56,567 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-05-06 06:01:56,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:01:56,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-05-06 06:01:56,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1486, Invalid=1594, Unknown=0, NotChecked=0, Total=3080 [2021-05-06 06:01:56,567 INFO L87 Difference]: Start difference. First operand 4191 states and 4291 transitions. Second operand has 56 states, 56 states have (on average 3.875) internal successors, (217), 55 states have internal predecessors, (217), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:01:59,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:01:59,059 INFO L93 Difference]: Finished difference Result 309 states and 308 transitions. [2021-05-06 06:01:59,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-06 06:01:59,059 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.875) internal successors, (217), 55 states have internal predecessors, (217), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 316 [2021-05-06 06:01:59,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:01:59,059 INFO L225 Difference]: With dead ends: 309 [2021-05-06 06:01:59,059 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 06:01:59,060 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 367 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1725 ImplicationChecksByTransitivity, 2781.0ms TimeCoverageRelationStatistics Valid=4452, Invalid=7320, Unknown=0, NotChecked=0, Total=11772 [2021-05-06 06:01:59,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 06:01:59,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 06:01:59,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 06:01:59,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 06:01:59,060 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 316 [2021-05-06 06:01:59,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:01:59,060 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 06:01:59,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 56 states, 56 states have (on average 3.875) internal successors, (217), 55 states have internal predecessors, (217), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:01:59,060 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 06:01:59,060 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 06:01:59,278 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:01:59,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 06:01:59 BasicIcfg [2021-05-06 06:01:59,281 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 06:01:59,281 INFO L168 Benchmark]: Toolchain (without parser) took 80299.01 ms. Allocated memory was 170.9 MB in the beginning and 429.9 MB in the end (delta: 259.0 MB). Free memory was 136.4 MB in the beginning and 293.7 MB in the end (delta: -157.4 MB). Peak memory consumption was 102.7 MB. Max. memory is 8.0 GB. [2021-05-06 06:01:59,282 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 170.9 MB. Free memory is still 152.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 06:01:59,282 INFO L168 Benchmark]: CACSL2BoogieTranslator took 146.56 ms. Allocated memory is still 170.9 MB. Free memory was 136.0 MB in the beginning and 126.2 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-06 06:01:59,282 INFO L168 Benchmark]: Boogie Preprocessor took 81.92 ms. Allocated memory is still 170.9 MB. Free memory was 126.2 MB in the beginning and 154.1 MB in the end (delta: -27.9 MB). Peak memory consumption was 5.0 MB. Max. memory is 8.0 GB. [2021-05-06 06:01:59,282 INFO L168 Benchmark]: RCFGBuilder took 312.95 ms. Allocated memory is still 170.9 MB. Free memory was 154.1 MB in the beginning and 139.5 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-06 06:01:59,282 INFO L168 Benchmark]: IcfgTransformer took 28.06 ms. Allocated memory is still 170.9 MB. Free memory was 139.5 MB in the beginning and 138.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 06:01:59,282 INFO L168 Benchmark]: TraceAbstraction took 79723.49 ms. Allocated memory was 170.9 MB in the beginning and 429.9 MB in the end (delta: 259.0 MB). Free memory was 138.0 MB in the beginning and 293.7 MB in the end (delta: -155.8 MB). Peak memory consumption was 105.0 MB. Max. memory is 8.0 GB. [2021-05-06 06:01:59,282 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 170.9 MB. Free memory is still 152.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 146.56 ms. Allocated memory is still 170.9 MB. Free memory was 136.0 MB in the beginning and 126.2 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 81.92 ms. Allocated memory is still 170.9 MB. Free memory was 126.2 MB in the beginning and 154.1 MB in the end (delta: -27.9 MB). Peak memory consumption was 5.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 312.95 ms. Allocated memory is still 170.9 MB. Free memory was 154.1 MB in the beginning and 139.5 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 28.06 ms. Allocated memory is still 170.9 MB. Free memory was 139.5 MB in the beginning and 138.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 79723.49 ms. Allocated memory was 170.9 MB in the beginning and 429.9 MB in the end (delta: 259.0 MB). Free memory was 138.0 MB in the beginning and 293.7 MB in the end (delta: -155.8 MB). Peak memory consumption was 105.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 79688.7ms, OverallIterations: 33, TraceHistogramMax: 102, EmptinessCheckTime: 31.6ms, AutomataDifference: 46216.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 698 SDtfs, 2493 SDslu, 8132 SDs, 0 SdLazy, 48169 SolverSat, 1721 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 13883.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5571 GetRequests, 3686 SyntacticMatches, 2 SemanticMatches, 1883 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42197 ImplicationChecksByTransitivity, 44331.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=4191occurred in iteration=32, InterpolantAutomatonStates: 1019, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 164.9ms AutomataMinimizationTime, 33 MinimizatonAttempts, 2636 StatesRemovedByMinimization, 31 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 426.5ms SsaConstructionTime, 1701.6ms SatisfiabilityAnalysisTime, 23870.5ms InterpolantComputationTime, 7267 NumberOfCodeBlocks, 7225 NumberOfCodeBlocksAsserted, 651 NumberOfCheckSat, 7204 ConstructedInterpolants, 0 QuantifiedInterpolants, 19298 SizeOfPredicates, 1 NumberOfNonLiveVariables, 9737 ConjunctsInSsa, 1004 ConjunctsInUnsatCore, 63 InterpolantComputations, 3 PerfectInterpolantSequences, 94349/193200 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...