/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound5.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 07:42:34,397 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 07:42:34,399 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 07:42:34,434 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 07:42:34,446 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 07:42:34,446 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 07:42:34,447 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 07:42:34,448 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 07:42:34,448 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 07:42:34,449 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 07:42:34,450 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 07:42:34,462 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 07:42:34,463 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 07:42:34,465 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 07:42:34,466 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 07:42:34,466 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 07:42:34,468 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 07:42:34,472 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 07:42:34,473 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 07:42:34,473 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 07:42:34,474 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 07:42:34,482 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 07:42:34,482 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 07:42:34,483 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 07:42:34,483 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 07:42:34,483 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 07:42:34,483 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 07:42:34,483 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 07:42:34,484 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 07:42:34,484 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 07:42:34,484 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 07:42:34,484 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 07:42:34,484 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 07:42:34,484 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 07:42:34,484 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 07:42:34,484 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 07:42:34,484 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 07:42:34,485 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 07:42:34,485 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 07:42:34,485 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 07:42:34,485 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 07:42:34,485 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 07:42:34,486 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 07:42:34,486 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 07:42:34,720 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 07:42:34,741 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 07:42:34,743 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 07:42:34,744 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 07:42:34,748 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 07:42:34,749 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound5.i [2021-05-06 07:42:34,808 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2924ce38/9dbbfdfb362e40978d10e48565c2d68c/FLAG66c5f3963 [2021-05-06 07:42:35,192 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 07:42:35,193 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound5.i [2021-05-06 07:42:35,197 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2924ce38/9dbbfdfb362e40978d10e48565c2d68c/FLAG66c5f3963 [2021-05-06 07:42:35,595 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2924ce38/9dbbfdfb362e40978d10e48565c2d68c [2021-05-06 07:42:35,597 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 07:42:35,599 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 07:42:35,600 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 07:42:35,600 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 07:42:35,602 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 07:42:35,603 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:42:35" (1/1) ... [2021-05-06 07:42:35,604 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bc70e0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:42:35, skipping insertion in model container [2021-05-06 07:42:35,604 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:42:35" (1/1) ... [2021-05-06 07:42:35,608 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 07:42:35,620 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 07:42:35,719 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound5.i[959,972] [2021-05-06 07:42:35,736 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:42:35,743 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 07:42:35,755 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound5.i[959,972] [2021-05-06 07:42:35,769 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:42:35,782 INFO L208 MainTranslator]: Completed translation [2021-05-06 07:42:35,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:42:35 WrapperNode [2021-05-06 07:42:35,783 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 07:42:35,784 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 07:42:35,784 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 07:42:35,784 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 07:42:35,817 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:42:35" (1/1) ... [2021-05-06 07:42:35,817 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:42:35" (1/1) ... [2021-05-06 07:42:35,831 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:42:35" (1/1) ... [2021-05-06 07:42:35,832 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:42:35" (1/1) ... [2021-05-06 07:42:35,844 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:42:35" (1/1) ... [2021-05-06 07:42:35,848 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:42:35" (1/1) ... [2021-05-06 07:42:35,853 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:42:35" (1/1) ... [2021-05-06 07:42:35,857 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 07:42:35,858 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 07:42:35,858 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 07:42:35,859 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 07:42:35,859 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:42:35" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 07:42:35,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 07:42:35,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 07:42:35,944 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 07:42:35,945 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 07:42:35,945 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 07:42:35,945 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 07:42:35,945 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 07:42:35,945 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 07:42:35,945 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-06 07:42:35,945 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-06 07:42:35,946 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 07:42:35,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 07:42:35,946 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 07:42:35,946 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 07:42:35,946 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 07:42:35,946 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 07:42:35,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 07:42:35,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 07:42:35,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 07:42:35,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 07:42:35,948 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 07:42:35,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 07:42:36,215 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 07:42:36,215 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 07:42:36,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:42:36 BoogieIcfgContainer [2021-05-06 07:42:36,216 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 07:42:36,217 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 07:42:36,217 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 07:42:36,218 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 07:42:36,220 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:42:36" (1/1) ... [2021-05-06 07:42:36,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:42:36 BasicIcfg [2021-05-06 07:42:36,231 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 07:42:36,232 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 07:42:36,232 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 07:42:36,234 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 07:42:36,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 07:42:35" (1/4) ... [2021-05-06 07:42:36,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fb873ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:42:36, skipping insertion in model container [2021-05-06 07:42:36,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:42:35" (2/4) ... [2021-05-06 07:42:36,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fb873ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:42:36, skipping insertion in model container [2021-05-06 07:42:36,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:42:36" (3/4) ... [2021-05-06 07:42:36,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fb873ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 07:42:36, skipping insertion in model container [2021-05-06 07:42:36,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:42:36" (4/4) ... [2021-05-06 07:42:36,236 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_unwindbound5.iJordan [2021-05-06 07:42:36,240 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 07:42:36,243 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 07:42:36,255 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 07:42:36,268 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 07:42:36,269 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 07:42:36,269 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 07:42:36,269 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 07:42:36,269 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 07:42:36,269 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 07:42:36,269 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 07:42:36,269 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 07:42:36,278 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 07:42:36,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 07:42:36,283 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:42:36,284 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:42:36,284 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:42:36,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:42:36,288 INFO L82 PathProgramCache]: Analyzing trace with hash 2097950667, now seen corresponding path program 1 times [2021-05-06 07:42:36,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:42:36,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483624173] [2021-05-06 07:42:36,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:42:36,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:42:36,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 07:42:36,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:42:36,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:42:36,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:42:36,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483624173] [2021-05-06 07:42:36,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483624173] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:42:36,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:42:36,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 07:42:36,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791738510] [2021-05-06 07:42:36,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 07:42:36,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:42:36,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 07:42:36,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:42:36,441 INFO L87 Difference]: Start difference. First operand has 26 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:42:36,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:42:36,497 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2021-05-06 07:42:36,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 07:42:36,498 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 07:42:36,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:42:36,503 INFO L225 Difference]: With dead ends: 27 [2021-05-06 07:42:36,504 INFO L226 Difference]: Without dead ends: 22 [2021-05-06 07:42:36,505 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:42:36,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-06 07:42:36,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-05-06 07:42:36,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:42:36,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2021-05-06 07:42:36,527 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 12 [2021-05-06 07:42:36,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:42:36,528 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2021-05-06 07:42:36,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:42:36,528 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2021-05-06 07:42:36,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-06 07:42:36,528 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:42:36,528 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:42:36,529 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 07:42:36,529 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:42:36,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:42:36,529 INFO L82 PathProgramCache]: Analyzing trace with hash 923003056, now seen corresponding path program 1 times [2021-05-06 07:42:36,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:42:36,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300955937] [2021-05-06 07:42:36,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:42:36,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:42:36,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 07:42:36,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:42:36,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:42:36,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:42:36,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300955937] [2021-05-06 07:42:36,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300955937] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:42:36,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:42:36,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 07:42:36,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130410543] [2021-05-06 07:42:36,648 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 07:42:36,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:42:36,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 07:42:36,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:42:36,649 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:42:36,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:42:36,719 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2021-05-06 07:42:36,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 07:42:36,719 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-05-06 07:42:36,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:42:36,720 INFO L225 Difference]: With dead ends: 23 [2021-05-06 07:42:36,720 INFO L226 Difference]: Without dead ends: 23 [2021-05-06 07:42:36,720 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 61.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:42:36,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-06 07:42:36,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-06 07:42:36,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:42:36,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2021-05-06 07:42:36,723 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 14 [2021-05-06 07:42:36,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:42:36,724 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2021-05-06 07:42:36,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:42:36,724 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2021-05-06 07:42:36,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-06 07:42:36,724 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:42:36,724 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:42:36,725 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 07:42:36,725 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:42:36,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:42:36,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1207414063, now seen corresponding path program 1 times [2021-05-06 07:42:36,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:42:36,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355816314] [2021-05-06 07:42:36,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:42:36,739 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:42:36,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1822906413] [2021-05-06 07:42:36,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:42:36,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:42:36,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 07:42:36,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:42:36,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:36,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:36,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:36,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:36,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:36,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:36,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:36,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:36,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:42:36,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:42:36,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355816314] [2021-05-06 07:42:36,912 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:42:36,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822906413] [2021-05-06 07:42:36,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822906413] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:42:36,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:42:36,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 07:42:36,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13057711] [2021-05-06 07:42:36,913 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 07:42:36,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:42:36,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 07:42:36,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:42:36,914 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:42:36,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:42:36,929 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2021-05-06 07:42:36,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 07:42:36,930 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-05-06 07:42:36,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:42:36,930 INFO L225 Difference]: With dead ends: 27 [2021-05-06 07:42:36,930 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 07:42:36,930 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.2ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:42:36,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 07:42:36,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-05-06 07:42:36,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:42:36,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2021-05-06 07:42:36,933 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 15 [2021-05-06 07:42:36,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:42:36,933 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2021-05-06 07:42:36,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:42:36,934 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2021-05-06 07:42:36,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-06 07:42:36,934 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:42:36,934 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:42:37,151 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-06 07:42:37,151 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:42:37,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:42:37,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1208546121, now seen corresponding path program 1 times [2021-05-06 07:42:37,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:42:37,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574662636] [2021-05-06 07:42:37,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:42:37,164 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:42:37,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1801175645] [2021-05-06 07:42:37,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:42:37,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:42:37,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 07:42:37,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:42:37,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:37,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:37,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:37,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:42:37,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:42:37,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574662636] [2021-05-06 07:42:37,353 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:42:37,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801175645] [2021-05-06 07:42:37,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801175645] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:42:37,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:42:37,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 07:42:37,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687990227] [2021-05-06 07:42:37,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 07:42:37,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:42:37,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 07:42:37,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:42:37,355 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:42:37,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:42:37,400 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2021-05-06 07:42:37,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 07:42:37,400 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-05-06 07:42:37,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:42:37,401 INFO L225 Difference]: With dead ends: 33 [2021-05-06 07:42:37,401 INFO L226 Difference]: Without dead ends: 32 [2021-05-06 07:42:37,401 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 28.0ms TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:42:37,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-06 07:42:37,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-06 07:42:37,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 07:42:37,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2021-05-06 07:42:37,405 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 15 [2021-05-06 07:42:37,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:42:37,405 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2021-05-06 07:42:37,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:42:37,405 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2021-05-06 07:42:37,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 07:42:37,406 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:42:37,406 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:42:37,625 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:42:37,625 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:42:37,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:42:37,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1227316531, now seen corresponding path program 1 times [2021-05-06 07:42:37,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:42:37,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919978881] [2021-05-06 07:42:37,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:42:37,634 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:42:37,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1459652846] [2021-05-06 07:42:37,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:42:37,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:42:37,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 07:42:37,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:42:37,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:37,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:37,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:37,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:37,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:37,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:37,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:37,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:37,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:42:37,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:42:37,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919978881] [2021-05-06 07:42:37,749 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:42:37,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459652846] [2021-05-06 07:42:37,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459652846] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:42:37,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:42:37,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 07:42:37,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195949103] [2021-05-06 07:42:37,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 07:42:37,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:42:37,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 07:42:37,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:42:37,751 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:42:37,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:42:37,772 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2021-05-06 07:42:37,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 07:42:37,773 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-05-06 07:42:37,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:42:37,773 INFO L225 Difference]: With dead ends: 34 [2021-05-06 07:42:37,773 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 07:42:37,774 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 14.4ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:42:37,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 07:42:37,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-06 07:42:37,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 07:42:37,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2021-05-06 07:42:37,777 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 17 [2021-05-06 07:42:37,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:42:37,777 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2021-05-06 07:42:37,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:42:37,777 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2021-05-06 07:42:37,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 07:42:37,778 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:42:37,778 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:42:37,984 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:42:37,985 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:42:37,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:42:37,985 INFO L82 PathProgramCache]: Analyzing trace with hash 2051197196, now seen corresponding path program 1 times [2021-05-06 07:42:37,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:42:37,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530789975] [2021-05-06 07:42:37,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:42:37,994 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:42:37,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1023953497] [2021-05-06 07:42:37,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:42:38,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:42:38,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 07:42:38,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:42:38,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:38,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:38,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:38,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:38,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:38,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:38,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:38,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:38,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:38,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:38,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:38,118 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:42:38,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:42:38,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530789975] [2021-05-06 07:42:38,118 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:42:38,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023953497] [2021-05-06 07:42:38,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023953497] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:42:38,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:42:38,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 07:42:38,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704480673] [2021-05-06 07:42:38,119 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 07:42:38,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:42:38,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 07:42:38,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:42:38,122 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:42:38,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:42:38,159 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2021-05-06 07:42:38,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 07:42:38,159 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-05-06 07:42:38,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:42:38,161 INFO L225 Difference]: With dead ends: 39 [2021-05-06 07:42:38,161 INFO L226 Difference]: Without dead ends: 39 [2021-05-06 07:42:38,163 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 18.1ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:42:38,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-06 07:42:38,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2021-05-06 07:42:38,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 30 states have internal predecessors, (38), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 07:42:38,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2021-05-06 07:42:38,173 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 18 [2021-05-06 07:42:38,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:42:38,174 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2021-05-06 07:42:38,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:42:38,174 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2021-05-06 07:42:38,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 07:42:38,174 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:42:38,175 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:42:38,384 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:42:38,385 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:42:38,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:42:38,386 INFO L82 PathProgramCache]: Analyzing trace with hash 2052329254, now seen corresponding path program 1 times [2021-05-06 07:42:38,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:42:38,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727313167] [2021-05-06 07:42:38,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:42:38,394 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:42:38,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [799314912] [2021-05-06 07:42:38,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:42:38,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:42:38,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 07:42:38,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:42:38,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:38,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:38,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:38,550 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:42:38,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:42:38,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727313167] [2021-05-06 07:42:38,550 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:42:38,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799314912] [2021-05-06 07:42:38,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799314912] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:42:38,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:42:38,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 07:42:38,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463793494] [2021-05-06 07:42:38,551 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 07:42:38,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:42:38,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 07:42:38,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:42:38,552 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:42:38,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:42:38,638 INFO L93 Difference]: Finished difference Result 50 states and 61 transitions. [2021-05-06 07:42:38,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 07:42:38,640 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-05-06 07:42:38,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:42:38,641 INFO L225 Difference]: With dead ends: 50 [2021-05-06 07:42:38,641 INFO L226 Difference]: Without dead ends: 49 [2021-05-06 07:42:38,641 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.5ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:42:38,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-06 07:42:38,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2021-05-06 07:42:38,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 36 states have internal predecessors, (44), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 07:42:38,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2021-05-06 07:42:38,644 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 18 [2021-05-06 07:42:38,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:42:38,644 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2021-05-06 07:42:38,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:42:38,644 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2021-05-06 07:42:38,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-06 07:42:38,645 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:42:38,645 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:42:38,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-06 07:42:38,853 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:42:38,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:42:38,853 INFO L82 PathProgramCache]: Analyzing trace with hash 462666167, now seen corresponding path program 1 times [2021-05-06 07:42:38,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:42:38,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566994055] [2021-05-06 07:42:38,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:42:38,860 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:42:38,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [605828866] [2021-05-06 07:42:38,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:42:38,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:42:38,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 07:42:38,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:42:38,936 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:42:38,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:42:38,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566994055] [2021-05-06 07:42:38,937 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:42:38,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605828866] [2021-05-06 07:42:38,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605828866] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:42:38,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:42:38,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 07:42:38,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485749694] [2021-05-06 07:42:38,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 07:42:38,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:42:38,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 07:42:38,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:42:38,938 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:42:38,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:42:38,947 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2021-05-06 07:42:38,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 07:42:38,948 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2021-05-06 07:42:38,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:42:38,948 INFO L225 Difference]: With dead ends: 43 [2021-05-06 07:42:38,948 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 07:42:38,949 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:42:38,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 07:42:38,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 07:42:38,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 07:42:38,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2021-05-06 07:42:38,951 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 24 [2021-05-06 07:42:38,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:42:38,951 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2021-05-06 07:42:38,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:42:38,951 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2021-05-06 07:42:38,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-06 07:42:38,951 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:42:38,951 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:42:39,152 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:42:39,153 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:42:39,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:42:39,153 INFO L82 PathProgramCache]: Analyzing trace with hash -269721504, now seen corresponding path program 1 times [2021-05-06 07:42:39,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:42:39,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004925389] [2021-05-06 07:42:39,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:42:39,161 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:42:39,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2126653163] [2021-05-06 07:42:39,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:42:39,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:42:39,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 07:42:39,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:42:39,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:39,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:39,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:39,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:39,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:39,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:39,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:39,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:39,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:39,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:39,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:39,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:39,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:39,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:39,314 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:42:39,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:42:39,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004925389] [2021-05-06 07:42:39,315 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:42:39,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126653163] [2021-05-06 07:42:39,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126653163] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:42:39,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:42:39,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 07:42:39,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052704846] [2021-05-06 07:42:39,315 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 07:42:39,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:42:39,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 07:42:39,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:42:39,316 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:42:39,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:42:39,349 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2021-05-06 07:42:39,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 07:42:39,349 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2021-05-06 07:42:39,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:42:39,350 INFO L225 Difference]: With dead ends: 53 [2021-05-06 07:42:39,350 INFO L226 Difference]: Without dead ends: 53 [2021-05-06 07:42:39,350 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 21.5ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:42:39,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-06 07:42:39,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2021-05-06 07:42:39,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 36 states have (on average 1.25) internal successors, (45), 37 states have internal predecessors, (45), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 07:42:39,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2021-05-06 07:42:39,353 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 27 [2021-05-06 07:42:39,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:42:39,353 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2021-05-06 07:42:39,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:42:39,353 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2021-05-06 07:42:39,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-06 07:42:39,353 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:42:39,354 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:42:39,561 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:42:39,561 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:42:39,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:42:39,562 INFO L82 PathProgramCache]: Analyzing trace with hash -268589446, now seen corresponding path program 1 times [2021-05-06 07:42:39,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:42:39,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167174728] [2021-05-06 07:42:39,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:42:39,571 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:42:39,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [330933565] [2021-05-06 07:42:39,571 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