/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_valuebound20.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 07:59:22,254 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 07:59:22,256 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 07:59:22,285 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 07:59:22,335 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 07:59:22,335 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 07:59:22,336 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 07:59:22,341 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 07:59:22,352 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 07:59:22,352 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 07:59:22,355 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 07:59:22,355 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 07:59:22,355 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 07:59:22,355 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 07:59:22,356 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 07:59:22,356 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 07:59:22,356 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 07:59:22,356 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 07:59:22,357 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 07:59:22,357 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 07:59:22,357 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 07:59:22,357 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 07:59:22,357 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 07:59:22,357 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 07:59:22,357 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 07:59:22,357 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 07:59:22,357 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 07:59:22,358 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 07:59:22,358 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 07:59:22,358 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 07:59:22,359 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 07:59:22,558 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 07:59:22,574 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 07:59:22,575 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 07:59:22,576 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 07:59:22,576 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 07:59:22,577 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin_valuebound20.i [2021-05-06 07:59:22,620 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/248466f17/eb28092a05f54c67931f3e2e5bb11da0/FLAG9e6413838 [2021-05-06 07:59:22,954 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 07:59:22,954 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin_valuebound20.i [2021-05-06 07:59:22,959 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/248466f17/eb28092a05f54c67931f3e2e5bb11da0/FLAG9e6413838 [2021-05-06 07:59:22,972 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/248466f17/eb28092a05f54c67931f3e2e5bb11da0 [2021-05-06 07:59:22,974 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 07:59:22,976 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 07:59:22,978 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 07:59:22,978 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 07:59:22,980 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 07:59:22,981 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:59:22" (1/1) ... [2021-05-06 07:59:22,982 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@198f943 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:59:22, skipping insertion in model container [2021-05-06 07:59:22,982 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:59:22" (1/1) ... [2021-05-06 07:59:22,986 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 07:59:22,997 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 07:59:23,110 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_valuebound20.i[958,971] [2021-05-06 07:59:23,165 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:59:23,179 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 07:59:23,189 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_valuebound20.i[958,971] [2021-05-06 07:59:23,206 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:59:23,215 INFO L208 MainTranslator]: Completed translation [2021-05-06 07:59:23,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:59:23 WrapperNode [2021-05-06 07:59:23,216 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 07:59:23,217 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 07:59:23,217 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 07:59:23,217 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 07:59:23,224 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:59:23" (1/1) ... [2021-05-06 07:59:23,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:59:23" (1/1) ... [2021-05-06 07:59:23,229 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:59:23" (1/1) ... [2021-05-06 07:59:23,230 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:59:23" (1/1) ... [2021-05-06 07:59:23,239 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:59:23" (1/1) ... [2021-05-06 07:59:23,242 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:59:23" (1/1) ... [2021-05-06 07:59:23,246 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:59:23" (1/1) ... [2021-05-06 07:59:23,249 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 07:59:23,250 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 07:59:23,250 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 07:59:23,250 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 07:59:23,251 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:59:23" (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 07:59:23,304 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 07:59:23,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 07:59:23,305 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 07:59:23,305 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 07:59:23,305 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 07:59:23,305 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 07:59:23,305 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 07:59:23,306 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 07:59:23,306 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-06 07:59:23,306 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-06 07:59:23,306 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 07:59:23,306 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 07:59:23,306 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 07:59:23,306 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 07:59:23,306 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 07:59:23,307 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 07:59:23,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 07:59:23,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 07:59:23,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 07:59:23,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 07:59:23,308 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 07:59:23,308 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 07:59:23,488 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 07:59:23,489 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 07:59:23,489 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:59:23 BoogieIcfgContainer [2021-05-06 07:59:23,490 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 07:59:23,490 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 07:59:23,490 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 07:59:23,491 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 07:59:23,492 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:59:23" (1/1) ... [2021-05-06 07:59:23,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:59:23 BasicIcfg [2021-05-06 07:59:23,502 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 07:59:23,503 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 07:59:23,503 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 07:59:23,504 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 07:59:23,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 07:59:22" (1/4) ... [2021-05-06 07:59:23,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1323bc2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:59:23, skipping insertion in model container [2021-05-06 07:59:23,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:59:23" (2/4) ... [2021-05-06 07:59:23,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1323bc2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:59:23, skipping insertion in model container [2021-05-06 07:59:23,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:59:23" (3/4) ... [2021-05-06 07:59:23,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1323bc2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 07:59:23, skipping insertion in model container [2021-05-06 07:59:23,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:59:23" (4/4) ... [2021-05-06 07:59:23,506 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_valuebound20.iJordan [2021-05-06 07:59:23,509 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 07:59:23,511 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 07:59:23,520 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 07:59:23,531 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 07:59:23,531 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 07:59:23,531 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 07:59:23,531 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 07:59:23,531 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 07:59:23,531 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 07:59:23,531 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 07:59:23,531 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 07:59:23,539 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 07:59:23,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 07:59:23,543 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:59:23,543 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:59:23,543 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:59:23,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:59:23,546 INFO L82 PathProgramCache]: Analyzing trace with hash -402483300, now seen corresponding path program 1 times [2021-05-06 07:59:23,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:59:23,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148812505] [2021-05-06 07:59:23,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:59:23,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:59:23,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 07:59:23,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:59:23,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 07:59:23,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:59:23,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 07:59:23,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:59:23,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 07:59:23,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:59:23,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-06 07:59:23,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:59:23,699 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 07:59:23,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:59:23,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148812505] [2021-05-06 07:59:23,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148812505] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:59:23,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:59:23,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 07:59:23,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499974886] [2021-05-06 07:59:23,703 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 07:59:23,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:59:23,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 07:59:23,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:59:23,712 INFO L87 Difference]: Start difference. First operand has 34 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 07:59:23,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:59:23,763 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2021-05-06 07:59:23,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 07:59:23,764 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-05-06 07:59:23,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:59:23,769 INFO L225 Difference]: With dead ends: 34 [2021-05-06 07:59:23,769 INFO L226 Difference]: Without dead ends: 29 [2021-05-06 07:59:23,770 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:59:23,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-06 07:59:23,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-06 07:59:23,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 07:59:23,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-05-06 07:59:23,790 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 34 [2021-05-06 07:59:23,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:59:23,791 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-05-06 07:59:23,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 07:59:23,791 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-05-06 07:59:23,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-06 07:59:23,792 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:59:23,792 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:59:23,792 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 07:59:23,792 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:59:23,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:59:23,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1131459816, now seen corresponding path program 1 times [2021-05-06 07:59:23,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:59:23,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952021652] [2021-05-06 07:59:23,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:59:23,848 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:59:23,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1723379213] [2021-05-06 07:59:23,848 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 07:59:23,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:59:23,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 07:59:23,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:59:24,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:59:24,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:59:24,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:59:24,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:59:24,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:59:24,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:59:24,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:59:24,199 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-06 07:59:24,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:59:24,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952021652] [2021-05-06 07:59:24,199 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:59:24,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723379213] [2021-05-06 07:59:24,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723379213] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:59:24,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:59:24,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 07:59:24,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815919516] [2021-05-06 07:59:24,200 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 07:59:24,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:59:24,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 07:59:24,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 07:59:24,201 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 07:59:24,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:59:24,346 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2021-05-06 07:59:24,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 07:59:24,346 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 35 [2021-05-06 07:59:24,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:59:24,348 INFO L225 Difference]: With dead ends: 42 [2021-05-06 07:59:24,348 INFO L226 Difference]: Without dead ends: 41 [2021-05-06 07:59:24,348 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 83.4ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 07:59:24,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-06 07:59:24,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2021-05-06 07:59:24,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.24) internal successors, (31), 26 states have internal predecessors, (31), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 07:59:24,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2021-05-06 07:59:24,359 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 35 [2021-05-06 07:59:24,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:59:24,359 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2021-05-06 07:59:24,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 07:59:24,360 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2021-05-06 07:59:24,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 07:59:24,361 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:59:24,362 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 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 07:59:24,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 07:59:24,573 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:59:24,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:59:24,573 INFO L82 PathProgramCache]: Analyzing trace with hash -305154333, now seen corresponding path program 1 times [2021-05-06 07:59:24,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:59:24,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184434534] [2021-05-06 07:59:24,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:59:24,585 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:59:24,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [324202306] [2021-05-06 07:59:24,585 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 07:59:24,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:59:24,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 07:59:24,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:59:24,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:59:24,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:59:24,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:59:24,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:59:24,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:59:24,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:59:24,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:59:24,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:59:24,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:59:24,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:59:24,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:59:24,834 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 07:59:24,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:59:24,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184434534] [2021-05-06 07:59:24,835 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:59:24,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324202306] [2021-05-06 07:59:24,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324202306] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:59:24,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:59:24,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 07:59:24,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100144883] [2021-05-06 07:59:24,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 07:59:24,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:59:24,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 07:59:24,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 07:59:24,836 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 07:59:27,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:59:27,189 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2021-05-06 07:59:27,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 07:59:27,190 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2021-05-06 07:59:27,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:59:27,190 INFO L225 Difference]: With dead ends: 54 [2021-05-06 07:59:27,191 INFO L226 Difference]: Without dead ends: 53 [2021-05-06 07:59:27,191 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 99.6ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-06 07:59:27,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-06 07:59:27,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 46. [2021-05-06 07:59:27,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 07:59:27,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2021-05-06 07:59:27,195 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 37 [2021-05-06 07:59:27,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:59:27,195 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2021-05-06 07:59:27,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 07:59:27,195 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2021-05-06 07:59:27,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 07:59:27,196 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:59:27,196 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:59:27,414 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:59:27,414 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:59:27,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:59:27,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1858557484, now seen corresponding path program 1 times [2021-05-06 07:59:27,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:59:27,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170089490] [2021-05-06 07:59:27,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:59:27,431 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:59:27,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2072168066] [2021-05-06 07:59:27,431 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 07:59:27,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:59:27,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-06 07:59:27,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:59:27,575 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 07:59:27,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:59:27,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170089490] [2021-05-06 07:59:27,575 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:59:27,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072168066] [2021-05-06 07:59:27,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072168066] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:59:27,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:59:27,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 07:59:27,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331110729] [2021-05-06 07:59:27,576 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 07:59:27,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:59:27,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 07:59:27,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:59:27,577 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 07:59:27,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:59:27,600 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2021-05-06 07:59:27,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 07:59:27,600 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2021-05-06 07:59:27,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:59:27,601 INFO L225 Difference]: With dead ends: 45 [2021-05-06 07:59:27,601 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 07:59:27,602 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:59:27,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 07:59:27,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-06 07:59:27,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 25 states have internal predecessors, (28), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 07:59:27,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2021-05-06 07:59:27,605 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 43 [2021-05-06 07:59:27,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:59:27,605 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2021-05-06 07:59:27,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 07:59:27,605 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2021-05-06 07:59:27,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-06 07:59:27,606 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:59:27,606 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:59:27,820 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:59:27,821 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:59:27,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:59:27,821 INFO L82 PathProgramCache]: Analyzing trace with hash 270500047, now seen corresponding path program 1 times [2021-05-06 07:59:27,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:59:27,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617694574] [2021-05-06 07:59:27,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:59:27,831 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:59:27,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1108633650] [2021-05-06 07:59:27,831 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