/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/divbin2_unwindbound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 07:42:12,863 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 07:42:12,865 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 07:42:12,895 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 07:42:12,952 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 07:42:12,960 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 07:42:12,961 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 07:42:12,962 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 07:42:12,979 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 07:42:12,980 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 07:42:12,982 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 07:42:12,982 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 07:42:12,982 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 07:42:12,982 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 07:42:12,983 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 07:42:12,983 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 07:42:12,983 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 07:42:12,983 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 07:42:12,984 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 07:42:12,984 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 07:42:12,985 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 07:42:12,985 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 07:42:12,985 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 07:42:12,985 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 07:42:12,985 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 07:42:12,985 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 07:42:12,985 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 07:42:12,986 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 07:42:12,986 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 07:42:12,987 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 07:42:12,987 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 07:42:13,264 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 07:42:13,281 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 07:42:13,283 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 07:42:13,284 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 07:42:13,284 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 07:42:13,285 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound2.i [2021-05-06 07:42:13,338 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5658b34c/187811184b4548bb9d49c58b0667087e/FLAG99cb3ff79 [2021-05-06 07:42:13,783 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 07:42:13,784 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound2.i [2021-05-06 07:42:13,788 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5658b34c/187811184b4548bb9d49c58b0667087e/FLAG99cb3ff79 [2021-05-06 07:42:14,187 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5658b34c/187811184b4548bb9d49c58b0667087e [2021-05-06 07:42:14,190 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 07:42:14,192 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 07:42:14,196 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 07:42:14,196 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 07:42:14,199 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 07:42:14,200 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:42:14" (1/1) ... [2021-05-06 07:42:14,202 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b282341 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:42:14, skipping insertion in model container [2021-05-06 07:42:14,202 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:42:14" (1/1) ... [2021-05-06 07:42:14,208 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 07:42:14,220 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 07:42:14,320 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/divbin2_unwindbound2.i[959,972] [2021-05-06 07:42:14,331 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:42:14,338 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 07:42:14,363 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/divbin2_unwindbound2.i[959,972] [2021-05-06 07:42:14,379 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:42:14,407 INFO L208 MainTranslator]: Completed translation [2021-05-06 07:42:14,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:42:14 WrapperNode [2021-05-06 07:42:14,408 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 07:42:14,409 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 07:42:14,409 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 07:42:14,409 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 07:42:14,419 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:42:14" (1/1) ... [2021-05-06 07:42:14,419 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:42:14" (1/1) ... [2021-05-06 07:42:14,425 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:42:14" (1/1) ... [2021-05-06 07:42:14,426 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:42:14" (1/1) ... [2021-05-06 07:42:14,441 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:42:14" (1/1) ... [2021-05-06 07:42:14,444 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:42:14" (1/1) ... [2021-05-06 07:42:14,445 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:42:14" (1/1) ... [2021-05-06 07:42:14,447 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 07:42:14,447 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 07:42:14,447 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 07:42:14,447 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 07:42:14,448 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:42:14" (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 07:42:14,517 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 07:42:14,517 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 07:42:14,517 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 07:42:14,517 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 07:42:14,517 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 07:42:14,518 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 07:42:14,518 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 07:42:14,518 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 07:42:14,518 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-06 07:42:14,519 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-06 07:42:14,519 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 07:42:14,519 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 07:42:14,519 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 07:42:14,519 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 07:42:14,520 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 07:42:14,520 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 07:42:14,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 07:42:14,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 07:42:14,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 07:42:14,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 07:42:14,522 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 07:42:14,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 07:42:14,827 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 07:42:14,827 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 07:42:14,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:42:14 BoogieIcfgContainer [2021-05-06 07:42:14,828 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 07:42:14,829 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 07:42:14,829 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 07:42:14,829 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 07:42:14,831 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:42:14" (1/1) ... [2021-05-06 07:42:14,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:42:14 BasicIcfg [2021-05-06 07:42:14,859 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 07:42:14,860 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 07:42:14,860 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 07:42:14,863 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 07:42:14,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 07:42:14" (1/4) ... [2021-05-06 07:42:14,864 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@165883c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:42:14, skipping insertion in model container [2021-05-06 07:42:14,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:42:14" (2/4) ... [2021-05-06 07:42:14,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@165883c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:42:14, skipping insertion in model container [2021-05-06 07:42:14,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:42:14" (3/4) ... [2021-05-06 07:42:14,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@165883c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 07:42:14, skipping insertion in model container [2021-05-06 07:42:14,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:42:14" (4/4) ... [2021-05-06 07:42:14,866 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_unwindbound2.iJordan [2021-05-06 07:42:14,871 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 07:42:14,874 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 07:42:14,887 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 07:42:14,904 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 07:42:14,905 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 07:42:14,905 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 07:42:14,905 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 07:42:14,905 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 07:42:14,905 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 07:42:14,905 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 07:42:14,905 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 07:42:14,915 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 07:42:14,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 07:42:14,921 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:42:14,926 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:42:14,926 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:42:14,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:42:14,930 INFO L82 PathProgramCache]: Analyzing trace with hash 2097950667, now seen corresponding path program 1 times [2021-05-06 07:42:14,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:42:14,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577072704] [2021-05-06 07:42:14,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:42:15,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:42:15,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 07:42:15,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:42:15,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:42:15,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:42:15,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577072704] [2021-05-06 07:42:15,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577072704] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:42:15,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:42:15,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 07:42:15,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240525004] [2021-05-06 07:42:15,094 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 07:42:15,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:42:15,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 07:42:15,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:42:15,109 INFO L87 Difference]: Start difference. First operand has 26 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:42:15,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:42:15,186 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2021-05-06 07:42:15,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 07:42:15,188 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 07:42:15,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:42:15,195 INFO L225 Difference]: With dead ends: 27 [2021-05-06 07:42:15,195 INFO L226 Difference]: Without dead ends: 22 [2021-05-06 07:42:15,196 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:42:15,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-06 07:42:15,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-05-06 07:42:15,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:42:15,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2021-05-06 07:42:15,222 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 12 [2021-05-06 07:42:15,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:42:15,222 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2021-05-06 07:42:15,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:42:15,222 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2021-05-06 07:42:15,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-06 07:42:15,223 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:42:15,223 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:42:15,223 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 07:42:15,224 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:42:15,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:42:15,224 INFO L82 PathProgramCache]: Analyzing trace with hash 923003056, now seen corresponding path program 1 times [2021-05-06 07:42:15,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:42:15,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007695766] [2021-05-06 07:42:15,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:42:15,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:42:15,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 07:42:15,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:42:15,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:42:15,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:42:15,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007695766] [2021-05-06 07:42:15,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007695766] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:42:15,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:42:15,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 07:42:15,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509500912] [2021-05-06 07:42:15,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 07:42:15,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:42:15,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 07:42:15,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:42:15,344 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:42:15,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:42:15,424 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2021-05-06 07:42:15,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 07:42:15,425 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-05-06 07:42:15,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:42:15,425 INFO L225 Difference]: With dead ends: 23 [2021-05-06 07:42:15,426 INFO L226 Difference]: Without dead ends: 23 [2021-05-06 07:42:15,426 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 78.3ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:42:15,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-06 07:42:15,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-06 07:42:15,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:42:15,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2021-05-06 07:42:15,430 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 14 [2021-05-06 07:42:15,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:42:15,430 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2021-05-06 07:42:15,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:42:15,430 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2021-05-06 07:42:15,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-06 07:42:15,431 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:42:15,431 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:42:15,431 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 07:42:15,431 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:42:15,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:42:15,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1207414063, now seen corresponding path program 1 times [2021-05-06 07:42:15,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:42:15,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44982454] [2021-05-06 07:42:15,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:42:15,462 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:42:15,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [682316128] [2021-05-06 07:42:15,463 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 07:42:15,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:42:15,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 07:42:15,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:42:15,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:15,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:15,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:15,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:15,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:15,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:15,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:15,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:15,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:42:15,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:42:15,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44982454] [2021-05-06 07:42:15,775 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:42:15,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682316128] [2021-05-06 07:42:15,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682316128] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:42:15,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:42:15,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 07:42:15,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630084241] [2021-05-06 07:42:15,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 07:42:15,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:42:15,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 07:42:15,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:42:15,777 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:42:15,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:42:15,807 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2021-05-06 07:42:15,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 07:42:15,810 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-05-06 07:42:15,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:42:15,811 INFO L225 Difference]: With dead ends: 27 [2021-05-06 07:42:15,811 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 07:42:15,812 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.5ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:42:15,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 07:42:15,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-05-06 07:42:15,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:42:15,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2021-05-06 07:42:15,815 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 15 [2021-05-06 07:42:15,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:42:15,816 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2021-05-06 07:42:15,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:42:15,816 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2021-05-06 07:42:15,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-06 07:42:15,818 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:42:15,818 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:42:16,041 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-06 07:42:16,041 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:42:16,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:42:16,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1208546121, now seen corresponding path program 1 times [2021-05-06 07:42:16,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:42:16,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598880182] [2021-05-06 07:42:16,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:42:16,059 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:42:16,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1980554474] [2021-05-06 07:42:16,059 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 07:42:16,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:42:16,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 07:42:16,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:42:16,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:16,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:16,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:16,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:42:16,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:42:16,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598880182] [2021-05-06 07:42:16,278 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:42:16,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980554474] [2021-05-06 07:42:16,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980554474] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:42:16,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:42:16,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 07:42:16,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342924784] [2021-05-06 07:42:16,278 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 07:42:16,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:42:16,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 07:42:16,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:42:16,279 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:42:16,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:42:16,349 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2021-05-06 07:42:16,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 07:42:16,349 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-05-06 07:42:16,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:42:16,350 INFO L225 Difference]: With dead ends: 33 [2021-05-06 07:42:16,350 INFO L226 Difference]: Without dead ends: 32 [2021-05-06 07:42:16,351 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 49.9ms TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:42:16,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-06 07:42:16,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-06 07:42:16,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 07:42:16,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2021-05-06 07:42:16,355 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 15 [2021-05-06 07:42:16,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:42:16,356 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2021-05-06 07:42:16,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:42:16,356 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2021-05-06 07:42:16,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 07:42:16,356 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:42:16,357 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:42:16,578 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:42:16,578 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:42:16,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:42:16,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1227316531, now seen corresponding path program 1 times [2021-05-06 07:42:16,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:42:16,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105850614] [2021-05-06 07:42:16,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:42:16,591 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:42:16,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [153325058] [2021-05-06 07:42:16,591 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 07:42:16,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:42:16,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 07:42:16,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:42:16,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:16,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:16,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:16,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:16,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:16,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:16,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:16,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:16,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:42:16,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:42:16,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105850614] [2021-05-06 07:42:16,785 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:42:16,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153325058] [2021-05-06 07:42:16,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153325058] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:42:16,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:42:16,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 07:42:16,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594268638] [2021-05-06 07:42:16,786 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 07:42:16,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:42:16,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 07:42:16,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:42:16,787 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:42:16,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:42:16,812 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2021-05-06 07:42:16,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 07:42:16,812 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-05-06 07:42:16,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:42:16,813 INFO L225 Difference]: With dead ends: 34 [2021-05-06 07:42:16,813 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 07:42:16,813 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 16.2ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:42:16,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 07:42:16,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-06 07:42:16,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 07:42:16,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2021-05-06 07:42:16,817 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 17 [2021-05-06 07:42:16,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:42:16,818 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2021-05-06 07:42:16,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:42:16,818 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2021-05-06 07:42:16,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 07:42:16,819 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:42:16,819 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:42:17,040 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:42:17,041 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:42:17,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:42:17,041 INFO L82 PathProgramCache]: Analyzing trace with hash 2051197196, now seen corresponding path program 1 times [2021-05-06 07:42:17,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:42:17,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515997227] [2021-05-06 07:42:17,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:42:17,053 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:42:17,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [129107829] [2021-05-06 07:42:17,053 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 07:42:17,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:42:17,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 07:42:17,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:42:17,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:17,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:17,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:17,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:42:17,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:42:17,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515997227] [2021-05-06 07:42:17,270 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:42:17,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129107829] [2021-05-06 07:42:17,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129107829] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:42:17,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:42:17,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 07:42:17,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072023314] [2021-05-06 07:42:17,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 07:42:17,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:42:17,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 07:42:17,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:42:17,271 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:42:17,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:42:17,358 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2021-05-06 07:42:17,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 07:42:17,359 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-05-06 07:42:17,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:42:17,360 INFO L225 Difference]: With dead ends: 44 [2021-05-06 07:42:17,360 INFO L226 Difference]: Without dead ends: 43 [2021-05-06 07:42:17,360 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.6ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:42:17,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-06 07:42:17,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-06 07:42:17,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 32 states have (on average 1.25) internal successors, (40), 33 states have internal predecessors, (40), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 07:42:17,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2021-05-06 07:42:17,367 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 18 [2021-05-06 07:42:17,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:42:17,367 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2021-05-06 07:42:17,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:42:17,368 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2021-05-06 07:42:17,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-06 07:42:17,368 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:42:17,368 INFO L523 BasicCegarLoop]: trace histogram [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 07:42:17,569 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:42:17,569 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:42:17,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:42:17,570 INFO L82 PathProgramCache]: Analyzing trace with hash 461534109, now seen corresponding path program 1 times [2021-05-06 07:42:17,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:42:17,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448184892] [2021-05-06 07:42:17,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:42:17,596 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:42:17,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1476040864] [2021-05-06 07:42:17,596 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 07:42:17,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:42:17,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 07:42:17,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:42:17,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:42:17,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:42:17,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448184892] [2021-05-06 07:42:17,726 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:42:17,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476040864] [2021-05-06 07:42:17,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476040864] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:42:17,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:42:17,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 07:42:17,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136835080] [2021-05-06 07:42:17,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 07:42:17,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:42:17,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 07:42:17,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:42:17,728 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:42:17,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:42:17,747 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2021-05-06 07:42:17,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 07:42:17,749 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2021-05-06 07:42:17,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:42:17,752 INFO L225 Difference]: With dead ends: 43 [2021-05-06 07:42:17,755 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 07:42:17,755 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:42:17,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 07:42:17,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 07:42:17,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 07:42:17,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2021-05-06 07:42:17,764 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 24 [2021-05-06 07:42:17,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:42:17,765 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2021-05-06 07:42:17,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:42:17,765 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2021-05-06 07:42:17,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-06 07:42:17,765 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:42:17,766 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] [2021-05-06 07:42:17,972 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-06 07:42:17,973 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:42:17,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:42:17,974 INFO L82 PathProgramCache]: Analyzing trace with hash -269721504, now seen corresponding path program 1 times [2021-05-06 07:42:17,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:42:17,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115360969] [2021-05-06 07:42:17,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:42:17,985 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:42:17,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1215874354] [2021-05-06 07:42:17,985 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 07:42:18,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:42:18,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 07:42:18,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:42:18,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:18,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:18,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:18,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:18,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:18,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:18,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:18,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:18,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:18,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:18,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:18,134 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-06 07:42:18,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:42:18,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115360969] [2021-05-06 07:42:18,135 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:42:18,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215874354] [2021-05-06 07:42:18,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215874354] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:42:18,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:42:18,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 07:42:18,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979908474] [2021-05-06 07:42:18,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 07:42:18,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:42:18,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 07:42:18,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:42:18,137 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:42:18,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:42:18,159 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2021-05-06 07:42:18,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 07:42:18,160 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2021-05-06 07:42:18,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:42:18,160 INFO L225 Difference]: With dead ends: 16 [2021-05-06 07:42:18,160 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 07:42:18,160 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 17.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:42:18,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 07:42:18,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 07:42:18,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 07:42:18,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 07:42:18,161 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2021-05-06 07:42:18,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:42:18,161 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 07:42:18,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:42:18,161 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 07:42:18,161 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 07:42:18,367 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:42:18,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 07:42:18 BasicIcfg [2021-05-06 07:42:18,371 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 07:42:18,371 INFO L168 Benchmark]: Toolchain (without parser) took 4179.59 ms. Allocated memory was 184.5 MB in the beginning and 228.6 MB in the end (delta: 44.0 MB). Free memory was 150.6 MB in the beginning and 203.3 MB in the end (delta: -52.7 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 07:42:18,371 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 184.5 MB. Free memory is still 167.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 07:42:18,371 INFO L168 Benchmark]: CACSL2BoogieTranslator took 212.29 ms. Allocated memory is still 184.5 MB. Free memory was 150.4 MB in the beginning and 167.8 MB in the end (delta: -17.4 MB). Peak memory consumption was 13.0 MB. Max. memory is 8.0 GB. [2021-05-06 07:42:18,372 INFO L168 Benchmark]: Boogie Preprocessor took 37.91 ms. Allocated memory is still 184.5 MB. Free memory was 167.8 MB in the beginning and 166.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 07:42:18,372 INFO L168 Benchmark]: RCFGBuilder took 380.84 ms. Allocated memory is still 184.5 MB. Free memory was 166.7 MB in the beginning and 151.0 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-06 07:42:18,373 INFO L168 Benchmark]: IcfgTransformer took 30.38 ms. Allocated memory is still 184.5 MB. Free memory was 151.0 MB in the beginning and 149.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 07:42:18,373 INFO L168 Benchmark]: TraceAbstraction took 3510.56 ms. Allocated memory was 184.5 MB in the beginning and 228.6 MB in the end (delta: 44.0 MB). Free memory was 149.4 MB in the beginning and 203.3 MB in the end (delta: -53.9 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 07:42:18,374 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 184.5 MB. Free memory is still 167.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 212.29 ms. Allocated memory is still 184.5 MB. Free memory was 150.4 MB in the beginning and 167.8 MB in the end (delta: -17.4 MB). Peak memory consumption was 13.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 37.91 ms. Allocated memory is still 184.5 MB. Free memory was 167.8 MB in the beginning and 166.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 380.84 ms. Allocated memory is still 184.5 MB. Free memory was 166.7 MB in the beginning and 151.0 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 30.38 ms. Allocated memory is still 184.5 MB. Free memory was 151.0 MB in the beginning and 149.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3510.56 ms. Allocated memory was 184.5 MB in the beginning and 228.6 MB in the end (delta: 44.0 MB). Free memory was 149.4 MB in the beginning and 203.3 MB in the end (delta: -53.9 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 21]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3464.6ms, OverallIterations: 8, TraceHistogramMax: 2, EmptinessCheckTime: 14.7ms, AutomataDifference: 460.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 182 SDtfs, 47 SDslu, 332 SDs, 0 SdLazy, 196 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 225.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 125 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 239.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=6, InterpolantAutomatonStates: 41, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 46.8ms AutomataMinimizationTime, 8 MinimizatonAttempts, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 66.2ms SsaConstructionTime, 211.4ms SatisfiabilityAnalysisTime, 860.9ms InterpolantComputationTime, 142 NumberOfCodeBlocks, 142 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 134 ConstructedInterpolants, 0 QuantifiedInterpolants, 478 SizeOfPredicates, 11 NumberOfNonLiveVariables, 641 ConjunctsInSsa, 52 ConjunctsInUnsatCore, 8 InterpolantComputations, 6 PerfectInterpolantSequences, 11/16 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...