/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/hard-u_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 09:00:02,749 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 09:00:02,750 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 09:00:02,791 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 09:00:02,857 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 09:00:02,858 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 09:00:02,859 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 09:00:02,869 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 09:00:02,877 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 09:00:02,877 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 09:00:02,878 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 09:00:02,878 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 09:00:02,878 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 09:00:02,878 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 09:00:02,878 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 09:00:02,878 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 09:00:02,878 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 09:00:02,878 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 09:00:02,878 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 09:00:02,879 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 09:00:02,879 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 09:00:02,879 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 09:00:02,879 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 09:00:02,879 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 09:00:02,879 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 09:00:02,879 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 09:00:02,879 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 09:00:02,880 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 09:00:02,880 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 09:00:02,880 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 09:00:02,880 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 09:00:03,147 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 09:00:03,162 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 09:00:03,164 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 09:00:03,165 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 09:00:03,165 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 09:00:03,166 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound50.c [2021-05-06 09:00:03,211 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49ba35194/3c42be3c274041c9980298d91cff6d06/FLAGe0c118533 [2021-05-06 09:00:03,573 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 09:00:03,573 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound50.c [2021-05-06 09:00:03,578 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49ba35194/3c42be3c274041c9980298d91cff6d06/FLAGe0c118533 [2021-05-06 09:00:03,592 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49ba35194/3c42be3c274041c9980298d91cff6d06 [2021-05-06 09:00:03,594 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 09:00:03,595 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 09:00:03,597 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 09:00:03,597 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 09:00:03,599 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 09:00:03,600 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 09:00:03" (1/1) ... [2021-05-06 09:00:03,601 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46ed8a42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:00:03, skipping insertion in model container [2021-05-06 09:00:03,601 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 09:00:03" (1/1) ... [2021-05-06 09:00:03,606 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 09:00:03,619 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 09:00:03,734 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/hard-u_unwindbound50.c[545,558] [2021-05-06 09:00:03,749 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 09:00:03,757 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 09:00:03,810 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/hard-u_unwindbound50.c[545,558] [2021-05-06 09:00:03,821 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 09:00:03,832 INFO L208 MainTranslator]: Completed translation [2021-05-06 09:00:03,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:00:03 WrapperNode [2021-05-06 09:00:03,832 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 09:00:03,834 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 09:00:03,834 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 09:00:03,834 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 09:00:03,841 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:00:03" (1/1) ... [2021-05-06 09:00:03,842 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:00:03" (1/1) ... [2021-05-06 09:00:03,852 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:00:03" (1/1) ... [2021-05-06 09:00:03,852 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:00:03" (1/1) ... [2021-05-06 09:00:03,863 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:00:03" (1/1) ... [2021-05-06 09:00:03,866 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:00:03" (1/1) ... [2021-05-06 09:00:03,869 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:00:03" (1/1) ... [2021-05-06 09:00:03,870 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 09:00:03,871 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 09:00:03,871 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 09:00:03,871 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 09:00:03,871 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:00:03" (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 09:00:03,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 09:00:03,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 09:00:03,927 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 09:00:03,927 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 09:00:03,927 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 09:00:03,927 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 09:00:03,927 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 09:00:03,927 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 09:00:03,927 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 09:00:03,928 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 09:00:03,928 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 09:00:03,928 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 09:00:03,928 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 09:00:03,929 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 09:00:03,929 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 09:00:03,929 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 09:00:03,929 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 09:00:03,929 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 09:00:03,930 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 09:00:03,930 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 09:00:04,117 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 09:00:04,118 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 09:00:04,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:00:04 BoogieIcfgContainer [2021-05-06 09:00:04,119 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 09:00:04,119 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 09:00:04,119 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 09:00:04,120 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 09:00:04,121 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:00:04" (1/1) ... [2021-05-06 09:00:04,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 09:00:04 BasicIcfg [2021-05-06 09:00:04,131 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 09:00:04,132 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 09:00:04,132 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 09:00:04,134 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 09:00:04,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 09:00:03" (1/4) ... [2021-05-06 09:00:04,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e8721c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 09:00:04, skipping insertion in model container [2021-05-06 09:00:04,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:00:03" (2/4) ... [2021-05-06 09:00:04,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e8721c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 09:00:04, skipping insertion in model container [2021-05-06 09:00:04,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:00:04" (3/4) ... [2021-05-06 09:00:04,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e8721c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 09:00:04, skipping insertion in model container [2021-05-06 09:00:04,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 09:00:04" (4/4) ... [2021-05-06 09:00:04,136 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_unwindbound50.cJordan [2021-05-06 09:00:04,139 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 09:00:04,142 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 09:00:04,152 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 09:00:04,163 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 09:00:04,163 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 09:00:04,164 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 09:00:04,164 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 09:00:04,164 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 09:00:04,164 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 09:00:04,164 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 09:00:04,164 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 09:00:04,173 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 09:00:04,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 09:00:04,177 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:00:04,178 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 09:00:04,178 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:00:04,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:00:04,181 INFO L82 PathProgramCache]: Analyzing trace with hash 79654685, now seen corresponding path program 1 times [2021-05-06 09:00:04,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:00:04,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765619771] [2021-05-06 09:00:04,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:00:04,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:00:04,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 09:00:04,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:00:04,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 09:00:04,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:00:04,331 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 09:00:04,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:00:04,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765619771] [2021-05-06 09:00:04,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765619771] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:00:04,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:00:04,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 09:00:04,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725343410] [2021-05-06 09:00:04,336 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 09:00:04,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:00:04,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 09:00:04,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 09:00:04,346 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) 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 09:00:04,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:00:04,448 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-06 09:00:04,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 09:00:04,449 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 09:00:04,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:00:04,455 INFO L225 Difference]: With dead ends: 38 [2021-05-06 09:00:04,455 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 09:00:04,456 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 09:00:04,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 09:00:04,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-05-06 09:00:04,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 09:00:04,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-06 09:00:04,482 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2021-05-06 09:00:04,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:00:04,483 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-06 09:00:04,483 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 09:00:04,483 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-06 09:00:04,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 09:00:04,483 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:00:04,483 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 09:00:04,484 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 09:00:04,484 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:00:04,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:00:04,485 INFO L82 PathProgramCache]: Analyzing trace with hash -85369733, now seen corresponding path program 1 times [2021-05-06 09:00:04,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:00:04,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609500696] [2021-05-06 09:00:04,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:00:04,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:00:04,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 09:00:04,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:00:04,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 09:00:04,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:00:04,582 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 09:00:04,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:00:04,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609500696] [2021-05-06 09:00:04,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609500696] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:00:04,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:00:04,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 09:00:04,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391339796] [2021-05-06 09:00:04,584 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 09:00:04,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:00:04,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 09:00:04,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:00:04,585 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 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 09:00:04,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:00:04,852 INFO L93 Difference]: Finished difference Result 45 states and 60 transitions. [2021-05-06 09:00:04,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 09:00:04,865 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 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 18 [2021-05-06 09:00:04,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:00:04,867 INFO L225 Difference]: With dead ends: 45 [2021-05-06 09:00:04,867 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 09:00:04,868 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 121.9ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:00:04,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 09:00:04,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2021-05-06 09:00:04,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 09:00:04,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2021-05-06 09:00:04,882 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2021-05-06 09:00:04,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:00:04,882 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2021-05-06 09:00:04,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 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 09:00:04,883 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2021-05-06 09:00:04,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 09:00:04,884 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:00:04,884 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:00:04,886 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 09:00:04,887 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:00:04,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:00:04,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1527809342, now seen corresponding path program 1 times [2021-05-06 09:00:04,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:00:04,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971311744] [2021-05-06 09:00:04,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:00:04,911 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:00:04,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1947954884] [2021-05-06 09:00:04,928 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 09:00:05,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:00:05,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 09:00:05,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:00:05,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:00:05,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:00:05,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:00:05,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:00:05,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:00:05,250 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 09:00:05,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:00:05,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971311744] [2021-05-06 09:00:05,251 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:00:05,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947954884] [2021-05-06 09:00:05,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947954884] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:00:05,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:00:05,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 09:00:05,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192164925] [2021-05-06 09:00:05,252 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 09:00:05,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:00:05,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 09:00:05,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 09:00:05,253 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 09:00:05,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:00:05,283 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2021-05-06 09:00:05,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 09:00:05,284 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-06 09:00:05,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:00:05,284 INFO L225 Difference]: With dead ends: 38 [2021-05-06 09:00:05,284 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 09:00:05,285 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 09:00:05,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 09:00:05,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-06 09:00:05,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 09:00:05,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2021-05-06 09:00:05,288 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2021-05-06 09:00:05,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:00:05,288 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2021-05-06 09:00:05,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 09:00:05,288 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2021-05-06 09:00:05,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 09:00:05,289 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:00:05,289 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, 1, 1] [2021-05-06 09:00:05,513 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-06 09:00:05,513 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:00:05,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:00:05,514 INFO L82 PathProgramCache]: Analyzing trace with hash 2128444854, now seen corresponding path program 1 times [2021-05-06 09:00:05,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:00:05,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211265793] [2021-05-06 09:00:05,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:00:05,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:00:05,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 09:00:05,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:00:05,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 09:00:05,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:00:05,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-06 09:00:05,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:00:05,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 09:00:05,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:00:05,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211265793] [2021-05-06 09:00:05,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211265793] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:00:05,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:00:05,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 09:00:05,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896261132] [2021-05-06 09:00:05,734 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 09:00:05,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:00:05,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 09:00:05,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:00:05,735 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 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 09:00:06,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:00:06,040 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2021-05-06 09:00:06,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 09:00:06,041 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 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 23 [2021-05-06 09:00:06,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:00:06,043 INFO L225 Difference]: With dead ends: 50 [2021-05-06 09:00:06,043 INFO L226 Difference]: Without dead ends: 50 [2021-05-06 09:00:06,044 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 183.7ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:00:06,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-06 09:00:06,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2021-05-06 09:00:06,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 09:00:06,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2021-05-06 09:00:06,052 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2021-05-06 09:00:06,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:00:06,052 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2021-05-06 09:00:06,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 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 09:00:06,052 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2021-05-06 09:00:06,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 09:00:06,053 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:00:06,054 INFO L523 BasicCegarLoop]: trace histogram [3, 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 09:00:06,054 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-06 09:00:06,054 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:00:06,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:00:06,055 INFO L82 PathProgramCache]: Analyzing trace with hash 135546551, now seen corresponding path program 1 times [2021-05-06 09:00:06,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:00:06,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873927547] [2021-05-06 09:00:06,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:00:06,088 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:00:06,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [452702579] [2021-05-06 09:00:06,095 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 09:00:06,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:00:06,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 09:00:06,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:00:06,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:00:06,316 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 09:00:06,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:00:06,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873927547] [2021-05-06 09:00:06,317 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:00:06,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452702579] [2021-05-06 09:00:06,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452702579] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:00:06,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:00:06,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 09:00:06,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541945434] [2021-05-06 09:00:06,317 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 09:00:06,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:00:06,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 09:00:06,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 09:00:06,318 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 09:00:08,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:00:08,580 INFO L93 Difference]: Finished difference Result 57 states and 73 transitions. [2021-05-06 09:00:08,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 09:00:08,581 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-06 09:00:08,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:00:08,581 INFO L225 Difference]: With dead ends: 57 [2021-05-06 09:00:08,581 INFO L226 Difference]: Without dead ends: 56 [2021-05-06 09:00:08,582 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:00:08,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-06 09:00:08,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-06 09:00:08,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 35 states have internal predecessors, (42), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 09:00:08,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 71 transitions. [2021-05-06 09:00:08,585 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 71 transitions. Word has length 28 [2021-05-06 09:00:08,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:00:08,585 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 71 transitions. [2021-05-06 09:00:08,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 09:00:08,586 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 71 transitions. [2021-05-06 09:00:08,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 09:00:08,586 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:00:08,586 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:00:08,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:00:08,801 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:00:08,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:00:08,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1016025214, now seen corresponding path program 1 times [2021-05-06 09:00:08,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:00:08,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426470880] [2021-05-06 09:00:08,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:00:08,819 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:00:08,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [529876610] [2021-05-06 09:00:08,820 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 09:00:08,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:00:08,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 09:00:08,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:00:08,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:00:08,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:00:08,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:00:08,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:00:08,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:00:09,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:00:09,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:00:09,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:00:09,086 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 09:00:09,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:00:09,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426470880] [2021-05-06 09:00:09,086 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:00:09,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529876610] [2021-05-06 09:00:09,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529876610] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:00:09,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:00:09,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 09:00:09,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961296300] [2021-05-06 09:00:09,088 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 09:00:09,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:00:09,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 09:00:09,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 09:00:09,089 INFO L87 Difference]: Start difference. First operand 56 states and 71 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 09:00:09,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:00:09,139 INFO L93 Difference]: Finished difference Result 69 states and 80 transitions. [2021-05-06 09:00:09,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 09:00:09,139 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2021-05-06 09:00:09,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:00:09,141 INFO L225 Difference]: With dead ends: 69 [2021-05-06 09:00:09,141 INFO L226 Difference]: Without dead ends: 69 [2021-05-06 09:00:09,142 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.9ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 09:00:09,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-06 09:00:09,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2021-05-06 09:00:09,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 44 states have internal predecessors, (50), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 09:00:09,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2021-05-06 09:00:09,157 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 36 [2021-05-06 09:00:09,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:00:09,158 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2021-05-06 09:00:09,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 09:00:09,159 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2021-05-06 09:00:09,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 09:00:09,161 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:00:09,161 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:00:09,378 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:00:09,378 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:00:09,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:00:09,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1017127481, now seen corresponding path program 1 times [2021-05-06 09:00:09,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:00:09,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690842344] [2021-05-06 09:00:09,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:00:09,386 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:00:09,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [32407727] [2021-05-06 09:00:09,386 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 09:00:09,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:00:09,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 09:00:09,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:00:09,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:00:09,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:00:09,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:00:09,588 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 09:00:09,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:00:09,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690842344] [2021-05-06 09:00:09,589 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:00:09,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32407727] [2021-05-06 09:00:09,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32407727] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:00:09,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:00:09,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 09:00:09,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910391474] [2021-05-06 09:00:09,589 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 09:00:09,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:00:09,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 09:00:09,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:00:09,590 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 09:00:13,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:00:13,927 INFO L93 Difference]: Finished difference Result 80 states and 96 transitions. [2021-05-06 09:00:13,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 09:00:13,927 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2021-05-06 09:00:13,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:00:13,928 INFO L225 Difference]: With dead ends: 80 [2021-05-06 09:00:13,928 INFO L226 Difference]: Without dead ends: 79 [2021-05-06 09:00:13,928 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 40.2ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 09:00:13,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-06 09:00:13,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2021-05-06 09:00:13,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 51 states have internal predecessors, (59), 18 states have call successors, (18), 11 states have call predecessors, (18), 10 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 09:00:13,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 93 transitions. [2021-05-06 09:00:13,932 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 93 transitions. Word has length 36 [2021-05-06 09:00:13,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:00:13,932 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 93 transitions. [2021-05-06 09:00:13,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 09:00:13,932 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 93 transitions. [2021-05-06 09:00:13,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 09:00:13,933 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:00:13,933 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:00:14,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:00:14,145 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:00:14,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:00:14,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1880362404, now seen corresponding path program 1 times [2021-05-06 09:00:14,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:00:14,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525969451] [2021-05-06 09:00:14,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:00:14,152 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:00:14,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1268292193] [2021-05-06 09:00:14,152 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 09:00:14,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:00:14,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 09:00:14,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:00:14,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:00:14,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:00:14,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:00:14,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:00:14,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:00:14,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:00:14,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:00:14,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:00:14,324 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 09:00:14,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:00:14,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525969451] [2021-05-06 09:00:14,324 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:00:14,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268292193] [2021-05-06 09:00:14,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268292193] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:00:14,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:00:14,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 09:00:14,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060730466] [2021-05-06 09:00:14,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 09:00:14,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:00:14,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 09:00:14,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 09:00:14,327 INFO L87 Difference]: Start difference. First operand 78 states and 93 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 09:00:14,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:00:14,386 INFO L93 Difference]: Finished difference Result 80 states and 95 transitions. [2021-05-06 09:00:14,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 09:00:14,387 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 38 [2021-05-06 09:00:14,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:00:14,389 INFO L225 Difference]: With dead ends: 80 [2021-05-06 09:00:14,389 INFO L226 Difference]: Without dead ends: 80 [2021-05-06 09:00:14,389 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 18.6ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:00:14,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-05-06 09:00:14,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-05-06 09:00:14,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 51 states have (on average 1.196078431372549) internal successors, (61), 53 states have internal predecessors, (61), 18 states have call successors, (18), 11 states have call predecessors, (18), 10 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 09:00:14,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 95 transitions. [2021-05-06 09:00:14,411 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 95 transitions. Word has length 38 [2021-05-06 09:00:14,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:00:14,412 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 95 transitions. [2021-05-06 09:00:14,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 09:00:14,413 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 95 transitions. [2021-05-06 09:00:14,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-06 09:00:14,414 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:00:14,414 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:00:14,617 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:00:14,617 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:00:14,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:00:14,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1525733273, now seen corresponding path program 1 times [2021-05-06 09:00:14,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:00:14,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700538055] [2021-05-06 09:00:14,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:00:14,623 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:00:14,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1200764097] [2021-05-06 09:00:14,623 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 09:00:14,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:00:14,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 09:00:14,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:00:14,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:00:14,939 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 09:00:14,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:00:14,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700538055] [2021-05-06 09:00:14,940 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:00:14,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200764097] [2021-05-06 09:00:14,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200764097] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:00:14,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:00:14,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 09:00:14,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862016551] [2021-05-06 09:00:14,941 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 09:00:14,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:00:14,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 09:00:14,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:00:14,941 INFO L87 Difference]: Start difference. First operand 80 states and 95 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 09:00:17,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:00:17,297 INFO L93 Difference]: Finished difference Result 95 states and 117 transitions. [2021-05-06 09:00:17,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 09:00:17,297 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2021-05-06 09:00:17,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:00:17,298 INFO L225 Difference]: With dead ends: 95 [2021-05-06 09:00:17,298 INFO L226 Difference]: Without dead ends: 95 [2021-05-06 09:00:17,299 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.4ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 09:00:17,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-05-06 09:00:17,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2021-05-06 09:00:17,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 58 states have (on average 1.206896551724138) internal successors, (70), 60 states have internal predecessors, (70), 23 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 09:00:17,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 114 transitions. [2021-05-06 09:00:17,302 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 114 transitions. Word has length 46 [2021-05-06 09:00:17,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:00:17,302 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 114 transitions. [2021-05-06 09:00:17,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 09:00:17,303 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 114 transitions. [2021-05-06 09:00:17,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 09:00:17,303 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:00:17,303 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:00:17,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:00:17,504 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:00:17,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:00:17,505 INFO L82 PathProgramCache]: Analyzing trace with hash 450187565, now seen corresponding path program 1 times [2021-05-06 09:00:17,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:00:17,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925125713] [2021-05-06 09:00:17,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:00:17,511 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:00:17,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [678478101] [2021-05-06 09:00:17,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:00:17,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:00:17,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 09:00:17,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:00:17,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:00:17,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:00:17,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:00:17,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:00:17,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:00:17,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:00:17,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:00:17,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:00:17,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:00:17,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:00:17,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:00:17,746 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 09:00:17,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:00:17,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925125713] [2021-05-06 09:00:17,747 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:00:17,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678478101] [2021-05-06 09:00:17,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678478101] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:00:17,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:00:17,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 09:00:17,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440961291] [2021-05-06 09:00:17,748 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 09:00:17,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:00:17,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 09:00:17,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:00:17,749 INFO L87 Difference]: Start difference. First operand 93 states and 114 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-06 09:00:17,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:00:17,818 INFO L93 Difference]: Finished difference Result 115 states and 132 transitions. [2021-05-06 09:00:17,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 09:00:17,819 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 50 [2021-05-06 09:00:17,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:00:17,820 INFO L225 Difference]: With dead ends: 115 [2021-05-06 09:00:17,820 INFO L226 Difference]: Without dead ends: 115 [2021-05-06 09:00:17,820 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 19.5ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-06 09:00:17,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-05-06 09:00:17,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2021-05-06 09:00:17,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 75 states have (on average 1.16) internal successors, (87), 77 states have internal predecessors, (87), 23 states have call successors, (23), 16 states have call predecessors, (23), 15 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 09:00:17,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 131 transitions. [2021-05-06 09:00:17,824 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 131 transitions. Word has length 50 [2021-05-06 09:00:17,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:00:17,824 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 131 transitions. [2021-05-06 09:00:17,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-06 09:00:17,825 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 131 transitions. [2021-05-06 09:00:17,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 09:00:17,825 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:00:17,825 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:00:18,041 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 09:00:18,041 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:00:18,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:00:18,041 INFO L82 PathProgramCache]: Analyzing trace with hash 451289832, now seen corresponding path program 1 times [2021-05-06 09:00:18,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:00:18,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845151750] [2021-05-06 09:00:18,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:00:18,060 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:00:18,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [74843884] [2021-05-06 09:00:18,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true