/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_valuebound5.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 07:52:25,303 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 07:52:25,305 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 07:52:25,337 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 07:52:25,380 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 07:52:25,380 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 07:52:25,381 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 07:52:25,384 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 07:52:25,399 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 07:52:25,400 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 07:52:25,402 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 07:52:25,402 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 07:52:25,402 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 07:52:25,402 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 07:52:25,402 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 07:52:25,402 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 07:52:25,403 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 07:52:25,403 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 07:52:25,403 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 07:52:25,404 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 07:52:25,404 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 07:52:25,404 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 07:52:25,404 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 07:52:25,404 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 07:52:25,404 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 07:52:25,404 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 07:52:25,404 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 07:52:25,405 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 07:52:25,405 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 07:52:25,406 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 07:52:25,406 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 07:52:25,634 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 07:52:25,660 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 07:52:25,662 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 07:52:25,663 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 07:52:25,664 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 07:52:25,664 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin2_valuebound5.i [2021-05-06 07:52:25,719 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2030f218f/55f6e1399bba4181828740a12ece64ce/FLAGb63b20494 [2021-05-06 07:52:26,360 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 07:52:26,361 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_valuebound5.i [2021-05-06 07:52:26,365 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2030f218f/55f6e1399bba4181828740a12ece64ce/FLAGb63b20494 [2021-05-06 07:52:26,515 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2030f218f/55f6e1399bba4181828740a12ece64ce [2021-05-06 07:52:26,517 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 07:52:26,520 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 07:52:26,522 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 07:52:26,522 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 07:52:26,532 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 07:52:26,533 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:52:26" (1/1) ... [2021-05-06 07:52:26,538 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@264aaa1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:52:26, skipping insertion in model container [2021-05-06 07:52:26,538 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:52:26" (1/1) ... [2021-05-06 07:52:26,543 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 07:52:26,556 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 07:52:26,722 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_valuebound5.i[959,972] [2021-05-06 07:52:26,734 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:52:26,740 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 07:52:26,809 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_valuebound5.i[959,972] [2021-05-06 07:52:26,837 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:52:26,846 INFO L208 MainTranslator]: Completed translation [2021-05-06 07:52:26,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:52:26 WrapperNode [2021-05-06 07:52:26,847 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 07:52:26,847 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 07:52:26,848 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 07:52:26,848 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 07:52:26,856 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:52:26" (1/1) ... [2021-05-06 07:52:26,856 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:52:26" (1/1) ... [2021-05-06 07:52:26,861 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:52:26" (1/1) ... [2021-05-06 07:52:26,861 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:52:26" (1/1) ... [2021-05-06 07:52:26,874 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:52:26" (1/1) ... [2021-05-06 07:52:26,877 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:52:26" (1/1) ... [2021-05-06 07:52:26,882 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:52:26" (1/1) ... [2021-05-06 07:52:26,886 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 07:52:26,887 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 07:52:26,887 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 07:52:26,888 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 07:52:26,888 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:52:26" (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 07:52:27,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 07:52:27,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 07:52:27,004 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 07:52:27,005 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 07:52:27,005 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 07:52:27,005 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 07:52:27,005 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 07:52:27,005 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 07:52:27,005 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-06 07:52:27,005 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-06 07:52:27,005 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 07:52:27,006 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 07:52:27,006 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 07:52:27,006 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 07:52:27,006 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 07:52:27,006 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 07:52:27,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 07:52:27,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 07:52:27,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 07:52:27,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 07:52:27,008 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 07:52:27,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 07:52:27,205 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 07:52:27,206 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 07:52:27,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:52:27 BoogieIcfgContainer [2021-05-06 07:52:27,207 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 07:52:27,207 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 07:52:27,207 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 07:52:27,208 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 07:52:27,210 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:52:27" (1/1) ... [2021-05-06 07:52:27,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:52:27 BasicIcfg [2021-05-06 07:52:27,220 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 07:52:27,221 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 07:52:27,222 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 07:52:27,223 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 07:52:27,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 07:52:26" (1/4) ... [2021-05-06 07:52:27,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37756bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:52:27, skipping insertion in model container [2021-05-06 07:52:27,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:52:26" (2/4) ... [2021-05-06 07:52:27,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37756bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:52:27, skipping insertion in model container [2021-05-06 07:52:27,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:52:27" (3/4) ... [2021-05-06 07:52:27,225 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37756bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 07:52:27, skipping insertion in model container [2021-05-06 07:52:27,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:52:27" (4/4) ... [2021-05-06 07:52:27,225 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_valuebound5.iJordan [2021-05-06 07:52:27,229 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 07:52:27,231 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 07:52:27,242 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 07:52:27,255 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 07:52:27,255 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 07:52:27,256 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 07:52:27,256 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 07:52:27,256 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 07:52:27,256 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 07:52:27,256 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 07:52:27,256 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 07:52:27,278 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 07:52:27,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 07:52:27,284 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:52:27,284 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:52:27,285 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:52:27,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:52:27,295 INFO L82 PathProgramCache]: Analyzing trace with hash 483266332, now seen corresponding path program 1 times [2021-05-06 07:52:27,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:52:27,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486150609] [2021-05-06 07:52:27,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:52:27,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:52:27,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 07:52:27,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:52:27,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 07:52:27,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:52:27,640 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 07:52:27,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:52:27,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486150609] [2021-05-06 07:52:27,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486150609] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:52:27,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:52:27,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 07:52:27,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329081861] [2021-05-06 07:52:27,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 07:52:27,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:52:27,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 07:52:27,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:52:27,655 INFO L87 Difference]: Start difference. First operand has 30 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 07:52:27,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:52:27,693 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-05-06 07:52:27,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 07:52:27,695 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-06 07:52:27,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:52:27,699 INFO L225 Difference]: With dead ends: 30 [2021-05-06 07:52:27,700 INFO L226 Difference]: Without dead ends: 25 [2021-05-06 07:52:27,701 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:52:27,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-06 07:52:27,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-06 07:52:27,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 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 07:52:27,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-05-06 07:52:27,722 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 18 [2021-05-06 07:52:27,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:52:27,723 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-05-06 07:52:27,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 07:52:27,723 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-05-06 07:52:27,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-06 07:52:27,724 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:52:27,724 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:52:27,724 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 07:52:27,724 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:52:27,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:52:27,725 INFO L82 PathProgramCache]: Analyzing trace with hash -2138426952, now seen corresponding path program 1 times [2021-05-06 07:52:27,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:52:27,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469993627] [2021-05-06 07:52:27,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:52:27,745 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:52:27,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1340875338] [2021-05-06 07:52:27,745 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 07:52:27,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:52:27,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 07:52:27,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:52:27,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:52:27,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:52:28,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:52:28,018 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 07:52:28,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:52:28,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469993627] [2021-05-06 07:52:28,020 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:52:28,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340875338] [2021-05-06 07:52:28,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340875338] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:52:28,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:52:28,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 07:52:28,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290623688] [2021-05-06 07:52:28,022 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 07:52:28,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:52:28,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 07:52:28,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:52:28,024 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 07:52:28,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:52:28,085 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2021-05-06 07:52:28,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 07:52:28,086 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-05-06 07:52:28,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:52:28,088 INFO L225 Difference]: With dead ends: 35 [2021-05-06 07:52:28,088 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 07:52:28,089 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 39.2ms TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:52:28,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 07:52:28,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-06 07:52:28,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 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 07:52:28,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-05-06 07:52:28,101 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 19 [2021-05-06 07:52:28,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:52:28,101 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-05-06 07:52:28,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 07:52:28,102 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-05-06 07:52:28,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-06 07:52:28,107 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:52:28,107 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:52:28,321 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 07:52:28,321 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:52:28,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:52:28,322 INFO L82 PathProgramCache]: Analyzing trace with hash -554838191, now seen corresponding path program 1 times [2021-05-06 07:52:28,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:52:28,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741927891] [2021-05-06 07:52:28,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:52:28,331 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:52:28,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [40101840] [2021-05-06 07:52:28,331 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 07:52:28,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:52:28,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 07:52:28,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:52:28,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:52:28,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:52:28,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:52:28,522 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 07:52:28,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:52:28,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741927891] [2021-05-06 07:52:28,522 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:52:28,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40101840] [2021-05-06 07:52:28,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40101840] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:52:28,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:52:28,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 07:52:28,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541135705] [2021-05-06 07:52:28,523 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 07:52:28,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:52:28,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 07:52:28,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 07:52:28,524 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 07:52:28,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:52:28,612 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2021-05-06 07:52:28,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 07:52:28,612 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2021-05-06 07:52:28,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:52:28,613 INFO L225 Difference]: With dead ends: 43 [2021-05-06 07:52:28,613 INFO L226 Difference]: Without dead ends: 42 [2021-05-06 07:52:28,614 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 48.8ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 07:52:28,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-06 07:52:28,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-05-06 07:52:28,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 07:52:28,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2021-05-06 07:52:28,617 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 21 [2021-05-06 07:52:28,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:52:28,617 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2021-05-06 07:52:28,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 07:52:28,617 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2021-05-06 07:52:28,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-06 07:52:28,618 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:52:28,618 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:52:28,832 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:52:28,833 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:52:28,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:52:28,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1600606598, now seen corresponding path program 1 times [2021-05-06 07:52:28,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:52:28,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081680291] [2021-05-06 07:52:28,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:52:28,841 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:52:28,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1833110337] [2021-05-06 07:52:28,841 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 07:52:28,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:52:28,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 07:52:28,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:52:28,936 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 07:52:28,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:52:28,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081680291] [2021-05-06 07:52:28,937 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:52:28,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833110337] [2021-05-06 07:52:28,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833110337] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:52:28,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:52:28,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 07:52:28,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699110782] [2021-05-06 07:52:28,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 07:52:28,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:52:28,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 07:52:28,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:52:28,938 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:52:28,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:52:28,949 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2021-05-06 07:52:28,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 07:52:28,949 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2021-05-06 07:52:28,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:52:28,950 INFO L225 Difference]: With dead ends: 42 [2021-05-06 07:52:28,950 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 07:52:28,950 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:52:28,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 07:52:28,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 07:52:28,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 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 07:52:28,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-05-06 07:52:28,953 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 27 [2021-05-06 07:52:28,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:52:28,953 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-05-06 07:52:28,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:52:28,953 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-05-06 07:52:28,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 07:52:28,954 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:52:28,954 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:52:29,163 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:52:29,163 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:52:29,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:52:29,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1664896543, now seen corresponding path program 1 times [2021-05-06 07:52:29,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:52:29,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079423951] [2021-05-06 07:52:29,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:52:29,171 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:52:29,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1944793416] [2021-05-06 07:52:29,171 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 07:52:29,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:52:29,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 07:52:29,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:52:29,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:52:29,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:52:29,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:52:29,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:52:29,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:52:29,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:52:29,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:52:29,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079423951] [2021-05-06 07:52:29,486 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:52:29,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944793416] [2021-05-06 07:52:29,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944793416] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:52:29,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:52:29,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 07:52:29,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094779373] [2021-05-06 07:52:29,487 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 07:52:29,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:52:29,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 07:52:29,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-06 07:52:29,488 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 10 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:52:29,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:52:29,599 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2021-05-06 07:52:29,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 07:52:29,599 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 10 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-05-06 07:52:29,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:52:29,600 INFO L225 Difference]: With dead ends: 53 [2021-05-06 07:52:29,600 INFO L226 Difference]: Without dead ends: 52 [2021-05-06 07:52:29,600 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 143.5ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-06 07:52:29,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-06 07:52:29,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-05-06 07:52:29,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 37 states have (on average 1.162162162162162) internal successors, (43), 38 states have internal predecessors, (43), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 07:52:29,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2021-05-06 07:52:29,604 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 29 [2021-05-06 07:52:29,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:52:29,604 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2021-05-06 07:52:29,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 10 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:52:29,604 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2021-05-06 07:52:29,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-06 07:52:29,604 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:52:29,605 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:52:29,819 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:52:29,820 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:52:29,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:52:29,820 INFO L82 PathProgramCache]: Analyzing trace with hash -976975752, now seen corresponding path program 2 times [2021-05-06 07:52:29,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:52:29,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278952046] [2021-05-06 07:52:29,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:52:29,838 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:52:29,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1710546482] [2021-05-06 07:52:29,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true