/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/nla-digbench-scaling/divbin_unwindbound50.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 07:57:16,052 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 07:57:16,054 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 07:57:16,095 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 07:57:16,160 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 07:57:16,161 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 07:57:16,162 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 07:57:16,166 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 07:57:16,182 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 07:57:16,182 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 07:57:16,186 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 07:57:16,186 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 07:57:16,186 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 07:57:16,186 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 07:57:16,186 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 07:57:16,187 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 07:57:16,187 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 07:57:16,187 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 07:57:16,188 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 07:57:16,188 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 07:57:16,188 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 07:57:16,188 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 07:57:16,189 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 07:57:16,189 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 07:57:16,189 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 07:57:16,189 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 07:57:16,189 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 07:57:16,189 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 07:57:16,189 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 07:57:16,191 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 07:57:16,191 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 07:57:16,489 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 07:57:16,514 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 07:57:16,516 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 07:57:16,517 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 07:57:16,518 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 07:57:16,519 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin_unwindbound50.i [2021-05-06 07:57:16,582 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90d4f22e1/0fad77b37a0e454f88e9233eb5ea52da/FLAGd06921817 [2021-05-06 07:57:16,997 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 07:57:16,997 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin_unwindbound50.i [2021-05-06 07:57:17,004 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90d4f22e1/0fad77b37a0e454f88e9233eb5ea52da/FLAGd06921817 [2021-05-06 07:57:17,406 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90d4f22e1/0fad77b37a0e454f88e9233eb5ea52da [2021-05-06 07:57:17,408 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 07:57:17,410 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 07:57:17,411 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 07:57:17,411 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 07:57:17,416 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 07:57:17,417 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:57:17" (1/1) ... [2021-05-06 07:57:17,419 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73fb7f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:57:17, skipping insertion in model container [2021-05-06 07:57:17,419 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:57:17" (1/1) ... [2021-05-06 07:57:17,425 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 07:57:17,441 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 07:57:17,558 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin_unwindbound50.i[958,971] [2021-05-06 07:57:17,571 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:57:17,582 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 07:57:17,597 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin_unwindbound50.i[958,971] [2021-05-06 07:57:17,648 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:57:17,661 INFO L208 MainTranslator]: Completed translation [2021-05-06 07:57:17,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:57:17 WrapperNode [2021-05-06 07:57:17,662 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 07:57:17,663 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 07:57:17,663 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 07:57:17,663 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 07:57:17,675 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:57:17" (1/1) ... [2021-05-06 07:57:17,675 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:57:17" (1/1) ... [2021-05-06 07:57:17,682 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:57:17" (1/1) ... [2021-05-06 07:57:17,683 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:57:17" (1/1) ... [2021-05-06 07:57:17,696 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:57:17" (1/1) ... [2021-05-06 07:57:17,700 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:57:17" (1/1) ... [2021-05-06 07:57:17,705 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:57:17" (1/1) ... [2021-05-06 07:57:17,710 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 07:57:17,712 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 07:57:17,712 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 07:57:17,713 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 07:57:17,714 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:57:17" (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 07:57:17,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 07:57:17,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 07:57:17,781 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 07:57:17,782 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 07:57:17,782 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 07:57:17,782 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 07:57:17,782 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 07:57:17,782 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 07:57:17,782 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-06 07:57:17,783 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-06 07:57:17,783 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 07:57:17,783 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 07:57:17,783 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 07:57:17,783 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 07:57:17,784 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 07:57:17,784 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 07:57:17,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 07:57:17,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 07:57:17,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 07:57:17,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 07:57:17,785 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 07:57:17,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 07:57:18,131 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 07:57:18,132 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 07:57:18,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:57:18 BoogieIcfgContainer [2021-05-06 07:57:18,133 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 07:57:18,134 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 07:57:18,134 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 07:57:18,134 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 07:57:18,141 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:57:18" (1/1) ... [2021-05-06 07:57:18,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:57:18 BasicIcfg [2021-05-06 07:57:18,161 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 07:57:18,162 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 07:57:18,162 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 07:57:18,165 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 07:57:18,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 07:57:17" (1/4) ... [2021-05-06 07:57:18,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d3c16f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:57:18, skipping insertion in model container [2021-05-06 07:57:18,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:57:17" (2/4) ... [2021-05-06 07:57:18,167 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d3c16f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:57:18, skipping insertion in model container [2021-05-06 07:57:18,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:57:18" (3/4) ... [2021-05-06 07:57:18,169 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d3c16f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 07:57:18, skipping insertion in model container [2021-05-06 07:57:18,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:57:18" (4/4) ... [2021-05-06 07:57:18,170 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound50.iJordan [2021-05-06 07:57:18,178 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 07:57:18,183 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 07:57:18,198 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 07:57:18,224 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 07:57:18,224 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 07:57:18,224 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 07:57:18,224 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 07:57:18,225 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 07:57:18,225 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 07:57:18,225 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 07:57:18,225 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 07:57:18,241 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 07:57:18,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 07:57:18,249 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:57:18,249 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:57:18,250 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:57:18,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:57:18,255 INFO L82 PathProgramCache]: Analyzing trace with hash 35225450, now seen corresponding path program 1 times [2021-05-06 07:57:18,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:57:18,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407118644] [2021-05-06 07:57:18,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:57:18,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:57:18,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 07:57:18,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:57:18,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 07:57:18,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:57:18,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 07:57:18,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:57:18,559 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 07:57:18,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:57:18,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407118644] [2021-05-06 07:57:18,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407118644] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:57:18,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:57:18,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 07:57:18,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217248085] [2021-05-06 07:57:18,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 07:57:18,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:57:18,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 07:57:18,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:57:18,597 INFO L87 Difference]: Start difference. First operand has 33 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:57:18,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:57:18,694 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2021-05-06 07:57:18,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 07:57:18,696 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 07:57:18,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:57:18,703 INFO L225 Difference]: With dead ends: 34 [2021-05-06 07:57:18,703 INFO L226 Difference]: Without dead ends: 29 [2021-05-06 07:57:18,704 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 67.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:57:18,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-06 07:57:18,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-05-06 07:57:18,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 07:57:18,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2021-05-06 07:57:18,734 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 23 [2021-05-06 07:57:18,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:57:18,735 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2021-05-06 07:57:18,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:57:18,735 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2021-05-06 07:57:18,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-06 07:57:18,737 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:57:18,737 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:57:18,737 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 07:57:18,737 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:57:18,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:57:18,738 INFO L82 PathProgramCache]: Analyzing trace with hash 106385839, now seen corresponding path program 1 times [2021-05-06 07:57:18,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:57:18,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828067582] [2021-05-06 07:57:18,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:57:18,753 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:57:18,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [824170714] [2021-05-06 07:57:18,753 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 07:57:18,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:57:18,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 07:57:18,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:57:18,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:18,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:18,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:19,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:19,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:19,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 07:57:19,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:57:19,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828067582] [2021-05-06 07:57:19,049 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:57:19,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824170714] [2021-05-06 07:57:19,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824170714] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:57:19,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:57:19,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 07:57:19,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485795617] [2021-05-06 07:57:19,051 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 07:57:19,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:57:19,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 07:57:19,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 07:57:19,052 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:57:19,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:57:19,074 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2021-05-06 07:57:19,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 07:57:19,076 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2021-05-06 07:57:19,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:57:19,079 INFO L225 Difference]: With dead ends: 30 [2021-05-06 07:57:19,079 INFO L226 Difference]: Without dead ends: 30 [2021-05-06 07:57:19,080 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 07:57:19,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-06 07:57:19,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-06 07:57:19,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 07:57:19,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2021-05-06 07:57:19,084 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 25 [2021-05-06 07:57:19,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:57:19,085 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2021-05-06 07:57:19,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:57:19,086 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2021-05-06 07:57:19,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-06 07:57:19,086 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:57:19,087 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:57:19,311 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 07:57:19,311 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:57:19,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:57:19,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1662084126, now seen corresponding path program 1 times [2021-05-06 07:57:19,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:57:19,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123692025] [2021-05-06 07:57:19,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:57:19,332 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:57:19,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1305931131] [2021-05-06 07:57:19,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:57:19,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:57:19,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 07:57:19,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:57:19,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:19,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:19,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:19,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:19,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:19,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:19,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:19,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:19,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 07:57:19,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:57:19,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123692025] [2021-05-06 07:57:19,615 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:57:19,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305931131] [2021-05-06 07:57:19,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305931131] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:57:19,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:57:19,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 07:57:19,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149890028] [2021-05-06 07:57:19,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 07:57:19,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:57:19,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 07:57:19,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:57:19,617 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:57:19,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:57:19,656 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2021-05-06 07:57:19,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 07:57:19,657 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2021-05-06 07:57:19,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:57:19,658 INFO L225 Difference]: With dead ends: 34 [2021-05-06 07:57:19,658 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 07:57:19,659 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.8ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:57:19,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 07:57:19,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-05-06 07:57:19,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 07:57:19,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2021-05-06 07:57:19,669 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 26 [2021-05-06 07:57:19,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:57:19,670 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2021-05-06 07:57:19,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:57:19,670 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2021-05-06 07:57:19,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-06 07:57:19,671 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:57:19,671 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:57:19,885 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:57:19,885 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:57:19,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:57:19,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1663216184, now seen corresponding path program 1 times [2021-05-06 07:57:19,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:57:19,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026242104] [2021-05-06 07:57:19,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:57:19,900 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:57:19,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1080311402] [2021-05-06 07:57:19,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:57:19,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:57:19,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 07:57:19,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:57:20,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:20,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:20,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:20,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:20,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:20,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 07:57:20,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:57:20,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026242104] [2021-05-06 07:57:20,125 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:57:20,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080311402] [2021-05-06 07:57:20,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080311402] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:57:20,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:57:20,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 07:57:20,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645528322] [2021-05-06 07:57:20,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 07:57:20,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:57:20,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 07:57:20,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 07:57:20,127 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:57:20,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:57:20,260 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2021-05-06 07:57:20,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 07:57:20,260 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2021-05-06 07:57:20,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:57:20,261 INFO L225 Difference]: With dead ends: 43 [2021-05-06 07:57:20,261 INFO L226 Difference]: Without dead ends: 42 [2021-05-06 07:57:20,262 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 100.0ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 07:57:20,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-06 07:57:20,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2021-05-06 07:57:20,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 29 states have internal predecessors, (36), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 07:57:20,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2021-05-06 07:57:20,267 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 26 [2021-05-06 07:57:20,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:57:20,267 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2021-05-06 07:57:20,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:57:20,268 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2021-05-06 07:57:20,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 07:57:20,268 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:57:20,269 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:57:20,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:57:20,473 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:57:20,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:57:20,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1664227005, now seen corresponding path program 1 times [2021-05-06 07:57:20,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:57:20,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104200450] [2021-05-06 07:57:20,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:57:20,483 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:57:20,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [414218628] [2021-05-06 07:57:20,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:57:20,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:57:20,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 07:57:20,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:57:20,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:20,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:20,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:20,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:20,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:20,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:20,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:20,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:20,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 07:57:20,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:57:20,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104200450] [2021-05-06 07:57:20,635 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:57:20,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414218628] [2021-05-06 07:57:20,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414218628] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:57:20,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:57:20,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 07:57:20,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198179423] [2021-05-06 07:57:20,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 07:57:20,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:57:20,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 07:57:20,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:57:20,637 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:57:20,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:57:20,669 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2021-05-06 07:57:20,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 07:57:20,670 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2021-05-06 07:57:20,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:57:20,670 INFO L225 Difference]: With dead ends: 43 [2021-05-06 07:57:20,671 INFO L226 Difference]: Without dead ends: 43 [2021-05-06 07:57:20,671 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 16.1ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:57:20,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-06 07:57:20,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2021-05-06 07:57:20,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 31 states have internal predecessors, (38), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 07:57:20,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2021-05-06 07:57:20,675 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 28 [2021-05-06 07:57:20,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:57:20,675 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2021-05-06 07:57:20,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:57:20,676 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2021-05-06 07:57:20,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 07:57:20,676 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:57:20,676 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:57:20,901 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:57:20,902 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:57:20,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:57:20,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1687306486, now seen corresponding path program 1 times [2021-05-06 07:57:20,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:57:20,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476037687] [2021-05-06 07:57:20,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:57:20,918 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:57:20,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1327703535] [2021-05-06 07:57:20,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 07:57:20,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:57:20,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 07:57:20,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:57:21,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:21,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:21,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:21,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:21,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:21,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:21,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:21,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:21,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:21,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:21,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:21,091 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 07:57:21,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:57:21,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476037687] [2021-05-06 07:57:21,092 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:57:21,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327703535] [2021-05-06 07:57:21,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327703535] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:57:21,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:57:21,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 07:57:21,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417129803] [2021-05-06 07:57:21,093 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 07:57:21,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:57:21,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 07:57:21,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:57:21,094 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:57:21,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:57:21,134 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2021-05-06 07:57:21,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 07:57:21,134 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-05-06 07:57:21,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:57:21,135 INFO L225 Difference]: With dead ends: 57 [2021-05-06 07:57:21,135 INFO L226 Difference]: Without dead ends: 57 [2021-05-06 07:57:21,135 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 21.5ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:57:21,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-06 07:57:21,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2021-05-06 07:57:21,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 40 states have (on average 1.25) internal successors, (50), 41 states have internal predecessors, (50), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 07:57:21,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2021-05-06 07:57:21,140 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 29 [2021-05-06 07:57:21,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:57:21,140 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2021-05-06 07:57:21,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:57:21,141 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2021-05-06 07:57:21,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 07:57:21,141 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:57:21,141 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:57:21,365 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 07:57:21,365 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:57:21,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:57:21,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1686174428, now seen corresponding path program 1 times [2021-05-06 07:57:21,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:57:21,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312473677] [2021-05-06 07:57:21,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:57:21,378 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:57:21,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1369098859] [2021-05-06 07:57:21,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:57:21,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:57:21,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 07:57:21,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:57:21,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:21,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:21,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:21,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:21,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:21,718 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 07:57:21,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:57:21,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312473677] [2021-05-06 07:57:21,719 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:57:21,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369098859] [2021-05-06 07:57:21,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369098859] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:57:21,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:57:21,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 07:57:21,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320634916] [2021-05-06 07:57:21,721 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 07:57:21,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:57:21,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 07:57:21,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 07:57:21,726 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 07:57:24,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:57:24,152 INFO L93 Difference]: Finished difference Result 71 states and 86 transitions. [2021-05-06 07:57:24,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 07:57:24,152 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2021-05-06 07:57:24,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:57:24,153 INFO L225 Difference]: With dead ends: 71 [2021-05-06 07:57:24,153 INFO L226 Difference]: Without dead ends: 68 [2021-05-06 07:57:24,154 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 182.5ms TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-05-06 07:57:24,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-06 07:57:24,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2021-05-06 07:57:24,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 45 states have (on average 1.2) internal successors, (54), 46 states have internal predecessors, (54), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 07:57:24,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2021-05-06 07:57:24,158 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 29 [2021-05-06 07:57:24,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:57:24,158 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2021-05-06 07:57:24,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 07:57:24,158 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2021-05-06 07:57:24,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-06 07:57:24,159 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:57:24,159 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:57:24,359 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:57:24,368 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:57:24,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:57:24,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1552566600, now seen corresponding path program 1 times [2021-05-06 07:57:24,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:57:24,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55454215] [2021-05-06 07:57:24,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:57:24,379 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:57:24,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [989989003] [2021-05-06 07:57:24,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:57:24,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:57:24,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-06 07:57:24,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:57:24,517 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 07:57:24,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:57:24,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55454215] [2021-05-06 07:57:24,517 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:57:24,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989989003] [2021-05-06 07:57:24,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989989003] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:57:24,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:57:24,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 07:57:24,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553902694] [2021-05-06 07:57:24,520 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 07:57:24,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:57:24,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 07:57:24,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:57:24,521 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 07:57:24,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:57:24,545 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2021-05-06 07:57:24,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 07:57:24,545 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2021-05-06 07:57:24,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:57:24,547 INFO L225 Difference]: With dead ends: 49 [2021-05-06 07:57:24,547 INFO L226 Difference]: Without dead ends: 41 [2021-05-06 07:57:24,547 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:57:24,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-06 07:57:24,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-05-06 07:57:24,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 07:57:24,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2021-05-06 07:57:24,553 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 35 [2021-05-06 07:57:24,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:57:24,553 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2021-05-06 07:57:24,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 07:57:24,554 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2021-05-06 07:57:24,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 07:57:24,554 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:57:24,554 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:57:24,773 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:57:24,774 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:57:24,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:57:24,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1290263155, now seen corresponding path program 1 times [2021-05-06 07:57:24,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:57:24,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858140723] [2021-05-06 07:57:24,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:57:24,784 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:57:24,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [565684080] [2021-05-06 07:57:24,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:57:24,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:57:24,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 07:57:24,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:57:24,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:24,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:24,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:24,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:24,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:24,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:24,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:24,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:24,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:24,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:24,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:24,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:24,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:24,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:57:24,963 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 07:57:24,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:57:24,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858140723] [2021-05-06 07:57:24,963 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:57:24,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565684080] [2021-05-06 07:57:24,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565684080] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:57:24,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:57:24,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 07:57:24,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535274810] [2021-05-06 07:57:24,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 07:57:24,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:57:24,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 07:57:24,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:57:24,965 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 07:57:25,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:57:25,028 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2021-05-06 07:57:25,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 07:57:25,029 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2021-05-06 07:57:25,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:57:25,031 INFO L225 Difference]: With dead ends: 59 [2021-05-06 07:57:25,032 INFO L226 Difference]: Without dead ends: 59 [2021-05-06 07:57:25,032 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 41.6ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:57:25,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-06 07:57:25,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2021-05-06 07:57:25,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 39 states have (on average 1.205128205128205) internal successors, (47), 40 states have internal predecessors, (47), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 07:57:25,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2021-05-06 07:57:25,047 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 38 [2021-05-06 07:57:25,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:57:25,048 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2021-05-06 07:57:25,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 07:57:25,049 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2021-05-06 07:57:25,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 07:57:25,052 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:57:25,052 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:57:25,279 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-06 07:57:25,279 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:57:25,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:57:25,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1291395213, now seen corresponding path program 1 times [2021-05-06 07:57:25,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:57:25,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609407770] [2021-05-06 07:57:25,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:57:25,290 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:57:25,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1868956530] [2021-05-06 07:57:25,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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